CN111403193A - Travel switch - Google Patents

Abstract

The present application provides a travel switch, which relates to the technical field of travel control equipment, and includes a first trigger member and a second trigger member, both of which include a first trigger portion and a second trigger portion; a moving member that can move and is equipped with a magnet a blocking member formed with a blocking portion; in the first position of the moving member, the magnet is defined by the blocking portion in such a way that the magnetic field of the magnet acting on the first trigger portion and the second trigger portion is blocked, so that the first trigger portion and the second trigger portion are blocked. The second trigger parts are separated from each other; when the moving member moves to the second position and the third position, the first trigger parts and the second trigger parts of the two trigger members respectively contact each other under the action of the magnetic field of the magnet. The above-mentioned travel switch realizes effective control of the magnetic field of the magnet, and to a certain extent solves the difficulty in controlling the timing when the reeds of the reed switch in the prior art are pulled in and disconnected from each other, resulting in a decrease in the accuracy of the control device and an increase in the stroke of the magnet. technical issues.

Description

Limit switch

technical field

The present application relates to the technical field of travel control equipment, and in particular, to a travel switch.

Background technique

Reed switch, under the action of the magnetic field of the magnet, after the reed is pulled in, the magnet is kept away from the reed switch. The magnet is disconnected further away from the reed switch, which results in an increase in the reed switch's travel and a decrease in control accuracy.

However, in the prior art, the strength of the magnetic field generated by the magnet cannot be accurately controlled, making it difficult to control the timing of the reeds of the reed switch being pulled in and disconnected from each other, resulting in a decrease in the precision of the control device and an increase in the stroke of the magnet.

SUMMARY OF THE INVENTION

In view of this, the present application provides a travel switch, the purpose is to solve to a certain extent the reed switch in the prior art, the magnetic field intensity generated by the magnet cannot be accurately controlled, so that the reeds of the reed switch are attracted and disconnected from each other. The timing is difficult to control, resulting in technical problems such as the decrease in the accuracy of the control equipment and the increase in the stroke.

The present application provides a travel switch, the travel switch includes a first trigger member and a second trigger member, and the first trigger member and the second trigger member each include a first trigger portion and a second trigger portion separated from each other ;

Under the action of the magnetic field, the first trigger part and the second trigger part can be in contact with each other; the travel switch further includes:

a moving member, capable of movement and mounted with a magnet;

a blocking member formed with a blocking portion;

In the first position of the moving member, the magnet is bounded by the blocking portion in such a way that the magnetic field of the magnet acting on the first triggering portion and the second triggering portion is blocked, so that the the first trigger part and the second trigger part are separated from each other;

When the moving member moves to the second position, the first trigger portion and the second trigger portion of the first trigger member contact each other under the action of the magnetic field of the magnet;

When the moving member moves to the third position, the first trigger portion and the second trigger portion of the second trigger member contact each other under the action of the magnetic field of the magnet.

Preferably, the travel switch includes:

a first mounting member, the first trigger member is mounted on the first mounting member;

a second mounting member facing the first mounting member, the second trigger member being mounted to the second mounting member;

defining a surface of the first mounting member facing the second mounting member as a first trigger surface, and defining a surface of the second mounting member facing the first mounting member as a second trigger surface;

The blocking member is mounted such that the blocking portion is located between the first trigger surface and the second trigger surface.

Preferably, the blocking part is formed as a blocking through hole, and in the first position of the moving member, the magnet is located inside the blocking through hole; in the second position and the third position of the moving member, all the at least a portion of the magnet is located outside the blocking through hole;

The moving direction of the moving member is perpendicular to the first trigger surface, and the first mounting member and the second mounting member are each formed with a hole corresponding to the blocking through hole for the moving member to penetrate department.

Preferably, the travel switch further includes:

a third magnetic conductive member covering the side of the blocking member facing the first trigger surface, the third magnetic conductive member is connected with the first mounting member;

a fourth magnetic conductive member covering the side of the blocking member facing the second trigger surface, the fourth magnetic conductive member is connected with the second mounting member;

a hole portion of the third magnetic conductive member and the fourth magnetic conductive member corresponding to the blocking through hole, through which the moving member passes;

When viewed along the direction of motion of the moving member:

The third magnetic conductive member overlaps with the first trigger member, and a portion of the fourth magnetic conductive member overlaps with the second trigger member.

Preferably, the travel switch further includes:

a first magnetic conductive member covering the side of the magnet facing the first trigger surface;

a second magnetic conductive member covering the side of the magnet facing the second trigger surface;

The sum of the dimensions of the third magnetically conductive member, the blocking member and the fourth magnetically conductive member in the moving direction of the moving member is greater than or equal to the first magnetically conductive member, the magnet and the The sum of the dimensions of the three second magnetically conductive members in the moving direction of the moving member.

Preferably, the third magnetically conductive member, the fourth magnetically conductive member and the blocking member are integrally formed; or

The third magnetically conductive member, the fourth magnetically conductive member and the blocking member are assembled and formed as a whole.

In a second aspect, the present application provides a travel switch, including a first trigger member, the first trigger member including a first trigger portion and a second trigger portion separated from each other; under the action of a magnetic field, the first trigger portion can be in contact with the second trigger part; the travel switch further includes:

a moving member, capable of movement and mounted with a magnet;

a blocking member formed with a blocking portion;

In the first position of the moving member, the magnet is limited by the blocking portion in such a way that the magnetic field of the magnet acting on the first trigger member is blocked, so that the first trigger portion is connected to the first trigger member. The two trigger parts are separated from each other;

When the moving member moves to the second position, the first trigger member makes the first trigger part contact the second trigger part under the action of the magnetic field of the magnet.

Preferably, the travel switch further includes:

a first mounting member, the first trigger member is mounted on the first mounting member;

The blocking member and the first mounting member face each other, and a plane on which a surface of the first mounting member facing the blocking member is defined is a first trigger surface.

Preferably, the blocking portion is formed as a blocking through hole, and in the first position of the moving member, the magnet is located inside the blocking through hole, and in the second position of the moving member, at least one of the magnets is located inside the blocking through hole. part outside the blocking via;

The moving direction of the moving member is perpendicular to the first trigger surface, and the first mounting member is formed with a hole portion corresponding to the blocking through hole through which the moving member penetrates.

Preferably, the travel switch further includes:

A third magnetic conductive member covers the side of the blocking member facing the first trigger surface, the third magnetic conductive member is connected to the first mounting member, and is formed with a through hole connected to the blocking member a corresponding hole through which the moving member passes; and a first magnetic conductive member covering the side of the magnet facing the first trigger surface.

When viewed along a direction perpendicular to the first trigger surface, a portion of the third magnetically permeable member overlaps the first trigger member;

The third magnetically conductive member and the blocking member are integrally formed; or both the third magnetically conductive member and the blocking member are assembled to form an integral body.

In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the preferred embodiments are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings.

In the travel switch provided by the present application, in the first position of the moving member, the magnet is defined by the blocking portion of the blocking member, so that the two triggering portions are separated from each other, and in the second position of the moving member, the two triggering portions of the first triggering member are in The magnets are in contact with each other under the action of the magnetic field, and at the third position of the moving member, the two triggering parts of the second triggering member are in contact with each other under the action of the magnetic field of the magnet, thereby realizing the effective control of the magnetic field of the magnet, thereby to a certain extent In the reed switch in the prior art, the intensity of the magnetic field generated by the magnet cannot be accurately controlled, which makes it difficult to control the timing of the reeds of the reed switch being pulled in and disconnected from each other, resulting in a decrease in the accuracy of the control device and an increase in the stroke of the magnet. question.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 shows a schematic diagram of the first embodiment of the travel switch of the present application;

FIG. 2 shows another schematic diagram of the first embodiment of the travel switch of the present application.

Reference number:

100-first trigger member; 200-second trigger member; 1-first reed; 2-second reed; 3-feedback lever; 4-magnet; 5-blocking ring; 6-first magnetic conductive pad; 7- The second magnetic pad; 8- The first magnetic plate; 9- The second magnetic plate; 10- The first mount; 10a- The first trigger surface; 11- The second mount; 11a- The second trigger surface; h-thickness of magnetic components; H-thickness of magnetic resistance.

Detailed ways

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection claimed in this application.

Fig. 1 shows a schematic diagram of the first embodiment of the travel switch of the present application; Fig. 2 shows another schematic diagram of the first embodiment of the travel switch of the present application.

1 and 2, the first embodiment of the travel switch provided by the present application includes a first trigger member, a second trigger member, a moving member, a magnet, a blocking member, a first magnetically conductive member, a second magnetically conductive member, a first Three magnetic conductive members, a fourth magnetic conductive member, a first mounting seat and a second mounting seat. The connection relationship and working principle of the above components will be described in detail below.

In the embodiment, the first trigger member 100 and the second trigger member 200 both include a first trigger portion and a second trigger portion, and the first trigger portion and the second trigger portion may be the first reed 1 and the second reed, respectively 2. Taking the first reed 1 as an example, the first reed 1 may be formed of a metal material that can be magnetized and has elasticity, so that the first reed 1 can be bent under the action of a magnetic field of a certain strength. Similarly, the properties of the second reed 2 may be the same as those of the first reed 1 , which will not be repeated here. In the embodiment, as shown in FIGS. 1 and 2 , taking the first reed 1 and the second reed 2 of the first trigger member 100 as an example, the first end of the first reed 1 and the second reed 2 The first ends of the can be connected via an intermediary portion, the intermediary portion being formed of an insulating material, the purpose of which will be described later, so that the two are formed in a state of being separated from each other. The first trigger member 100 including the first reed 1 , the second reed 2 and the intermediate portion can be inserted into the first mount 10 such that the portion of the first reed 1 exposed to the outer side of the first mount 10 and the portion of the second leaf spring 2 exposed to the outer side of the first mount 10 facing each other.

In this way, due to the above-mentioned properties of the first reed 1 and the second reed 2, when the first reed 1 and the second reed 2 are acted on by a magnetic field, they are magnetized to bend toward each other and then attract contact, so that when the first reed 1 and the second reed 2 are electrically connected to the circuit respectively, the two parts of the circuit are turned on, on the contrary, as the first reed 1 and the second reed 2 two When the magnetic field strength of the other is insufficient, the two reset and separate from each other to disconnect the two parts of the circuit. That is to say, the purpose of forming the above-mentioned intermediary part with insulating material is to prevent the first reed 1 and the second reed 2 from conducting the corresponding electrical connection circuit when the first reed 1 and the second reed 2 are separated from each other.

In order to facilitate the description of the positions of the following components, referring to the orientation shown in FIG. 1 , the lower surface of the first mounting seat 10 may be defined as the first trigger surface 10a, and the upper surface of the second mounting seat 11 may be defined as the second trigger surface surface 11a. The first mount 10 and the second mount 11 may be mounted facing each other so that the first trigger surface 10a and the second trigger surface 11a are parallel. Furthermore, the first reed 1 and the second reed 2 shown in FIG. 1 may both be parallel to the first trigger surface 10a. The description of component positions will be further described below in the orientation shown in FIG. 1 .

In an embodiment, the third magnetically permeable member may be mounted on the first trigger surface 10a, and the fourth magnetically permeable member may be mounted on the second trigger surface 11a. In the embodiment, the third magnetic conductive member may be the first magnetic conductive plate 8, the fourth magnetic conductive member may be the second magnetic conductive plate 9, and both the first magnetic conductive plate 8 and the second magnetic conductive plate 9 are composed of The magnetic conductive material is formed, and the two surfaces facing each other may be parallel. As shown in FIG. 1 , parts of the first magnetic conductive plate 8 and the second magnetic conductive plate 9 both extend into the space between the first trigger member and the second trigger member. The purpose is to make the following magnets The effect of the magnetic field is further transmitted to the first reed 1 and the second reed 2 of the first trigger member 100 via the first magnetic conductive plate 8 , and to the first reed 2 of the second trigger member 200 via the second magnetic conductive plate 9 . The reed 1 and the second reed 2 make up for the effect of the magnetic field reduced by the distance between the magnet and the first reed 1 and the second reed 2 to ensure the precise triggering of the triggering member.

In an embodiment, a blocking member may be installed between the first trigger surface 10a and the second trigger surface 11a, and the blocking member may be a blocking ring 5 . The blocking ring 5 is formed with blocking parts, and the magnets mounted on the moving member can be defined by the blocking parts, which will be described in detail below.

The blocking part may be a blocking through hole, the blocking through hole may penetrate the blocking part in a vertical direction, and the cross-section of the blocking through hole may be circular, that is, the blocking through hole is formed in a cylindrical shape. In the embodiment, the first magnetic conductive plate 8 and the second magnetic conductive plate 9 may be formed with holes whose size is greater than or equal to the inner diameter of the blocking through hole, and the first mounting seat 10 and the second mounting seat 11 may also be formed with a size The hole portion larger than or equal to the inner diameter of the blocking through hole enables both ends of the blocking through hole to communicate with the external environment when the blocking ring 5 is installed between the first magnetic conducting plate 8 and the second magnetic conducting plate 9 .

In an embodiment, the moving member may be a feedback rod 3, and the feedback rod 3 may be formed as a cylindrical rod member whose outer diameter may be slightly smaller than the inner diameter of the blocking through hole. One end of the feedback rod 3 (hereinafter referred to as the magnet end) may be formed with a cavity that can be sealed, the magnet 4 may be installed in the cavity, and the magnet 4 may preferably be a permanent magnet.

In an embodiment, the blocking ring 5 may be formed of a magnetically conductive material. When the magnet end of the feedback rod 3 is located in the blocking through hole (ie, the first position of the feedback rod 3), when the magnet 4 can be completely accommodated in the blocking through hole, the magnetic field of the magnet 4 forms a magnetic field loop through the blocking ring 5, so that The magnetic field is equivalent to being blocked by the blocking ring 5 and does not act on any set of the first reed 1 and the second reed 2 . When the magnet end of the feedback lever 3 moves toward the outside of the blocking through hole (ie, moves downward or upward), the magnet gradually moves out of the blocking through hole, and when the part of the magnet is located outside the blocking through hole (ie, the second position and third position, the feedback lever 3 has a second position reached by moving upward relative to the blocking ring 5 and a third position reached by moving downward), taking the second position as an example, the magnetic field of the magnet passes through the first guide. The magnetic plate 8 acts on the first reed 1 and the second reed 2 of the first trigger member 100 through transmission, so that the first reed 1 and the second reed 2 are attracted together by magnetic force. Similarly, the feedback lever The situation is similar when 3 is in the third position. The blocking through hole is located between the first triggering surface 10a and the second triggering surface 11a. The clamping method of installation makes the comparison of the up and down stroke of the feedback rod 3 stronger, which is beneficial to the troubleshooting when the stroke accuracy is faulty. In the embodiment, the feedback rod 3 can be installed on the motion mechanism, and the motion mechanism can have the same movement direction as the axial direction of the feedback rod 3 (ie, the axial direction of the blocking through hole), and the feedback rod 3 is driven to move by the motion mechanism, so that the stroke The switch completes the on-off process described above.

In the embodiment, the upper side and the lower side of the magnet 4 located in the cavity of the feedback rod 3 may also be respectively covered with a first magnetic conductive pad 6 and a second magnetic conductive pad 7 . Both of the two magnetic conductive pads 7 may be formed of magnetic conductive material. When the magnet is accommodated in the blocking through hole of the blocking ring 5, the first magnetic conductive pad 6 and the second magnetic conductive pad 7 can also be accommodated in the blocking through hole, and both participate in the conduction of the magnetic field circuit, and further The ground prevents the magnetic field of the magnet 4 from acting on the outside of the blocking ring 5 . In the embodiment, as described above, the distance moved by the feedback lever 3 from the first position to the second position (third position) can be understood as the stroke of the travel switch. In the absence of the first magnetic conductive pad 6 and the second magnetic conductive pad 7, it is possible that the barrier ring 5 does not sufficiently block the magnetic field, resulting in the first reed 1 and the second reed in the first position. 2 can still be pulled in under the action of the magnetic field, therefore, the arrangement of the first magnetic conductive pad 6 and the second magnetic conductive pad 7 increases the control precision of the travel switch and ensures the reliability of the travel switch.

It should be noted that when the feedback lever 3 in this embodiment is in the first position, the first reed 1 and the second reed 2 may be completely unaffected by the magnetic field of the magnet 4, or the first reed may be The effect of the blocked magnetic field on the first reed 1 and the second reed 2 is not enough to make the first reed 1 and the second reed 2 attract each other.

In the embodiment, FIGS. 1 and 2 show a movement of the feedback lever 3 , which has been specifically described in the above description. In this movement mode, the movement direction of the feedback rod 3 can be perpendicular to the first trigger surface 10a (of course also perpendicular to the second trigger surface 11a, the first magnetic conducting plate 8 and the second magnetic conducting plate 9). , which is beneficial to the design of the stroke of the feedback rod 3 according to the actual needs, so as to standardize the design.

In the embodiment, the sum of the dimensions of the first magnetic conductive pad 6 , the magnet 4 and the second magnetic conductive pad 7 in the movement direction of the feedback rod 3 can be defined (that is, in FIGS. 1 and 2 , the first magnetic conductive pad The distance between the upper end surface of the pad 6 and the lower end surface of the second magnetic conductive pad 7) is the thickness h of the magnetic assembly, and the first magnetic conductive plate 8, the blocking ring 5 and the second magnetic conductive plate 9 are in the movement direction of the feedback rod 3 The size of (ie, the distance between the first trigger surface 10a and the second trigger surface 11a in FIG. 1 and FIG. 2 ) is the magnetic resistance thickness H. In the embodiment, the magnetic resistance thickness H may be greater than or equal to the magnetic component thickness h, so as to effectively block the magnetic field of the magnet 4 , and at the same time, the stroke of the feedback rod 3 can be adjusted for the magnetic resistance thickness H.

That is to say, when the feedback rod 3 is in the first position, the parts of the first magnetic conductive plate 8 and the second magnetic conductive plate 9 that are in contact with the blocking ring 5 are allowed to participate in the magnetic resistance to the magnet 4, that is, the first magnetic conductive plate The plate 8 and the second magnetic conductive plate 9 have two functions: to transmit the magnetic field to the two reeds belonging to the same trigger member and to resist the magnetic field when the feedback lever 3 is in the first position. The first magnetic conductive plate 8 And the second magnetic conductive plate 9 is further beneficial to improve the accuracy of the travel switch, making the on-off switch (the two reeds of a certain trigger member are pulled together) and off (the two reeds of a certain trigger member are separated) more sensitive . In this case, it can be understood that in the first position of the feedback lever 3, the part of the magnet 4 may also be accommodated in the blocking part, for example, the lower end face of the magnet 4 extends beyond the lower end of the blocking through hole, but is still higher than The second trigger surface 11a. It can also be understood that, under the condition that the above relationship between the magnetic resistance thickness H and the magnetic component thickness h is satisfied, in the first position of the feedback lever 3, as long as the first reed 1 and the second reed 2 are separated from each other, It is not specifically limited whether the magnet and the magnetic conductive pad installed on the magnet are completely accommodated in the blocking through hole. On the contrary, when the feedback lever 3 is in the second position, as long as the first reed 1 and the second reed 2 are attracted to each other , does not specifically limit whether the magnet and the magnetic conductive pad installed on the magnet 4 are completely separated from the blocking through hole.

Advantageously, if the first magnetic conductive pad 6 passes through the first trigger surface 10a at a shorter distance, so that the two reeds of the first trigger member 100 are pulled together, the travel switch is more suitable for small travel scenarios, so The more precise the control that can be done, the same is true for the second magnetically conductive pad 7 .

Still taking the first position and the second position of the feedback rod 3 in the first embodiment as an example to continue the description, in the embodiment, the adjustment of the magnetic resistance thickness H can mainly be to adjust the depth of the blocking through hole. The blocking part can be relatively simple to adjust the stroke of the feedback rod 3 .

In addition, the travel switch provided by the present application also includes a second embodiment (not shown in the figure), which will be described below. The difference between the second embodiment and the first embodiment is that the second embodiment is a single-position travel switch. Only one first trigger member is included, and the first reed and the second reed are deformed under the action of the magnetic field to pull in and make the circuit conduct. Therefore, in the embodiment, a first mounting seat and a first magnetic conductive plate mounted on the mounting seat are also provided correspondingly.

In this embodiment, the manner in which the first reed is mounted on the first mounting seat may be the same as that in the first embodiment, and the definition of the first trigger plane is also the same, which will not be repeated here. The first magnetic conductive plate can be installed on the first trigger plane, that is, the lower end surface of the first mounting seat, and the installation method can also be the same as that in the first embodiment, and the blocking ring can be kept on the lower end surface of the first magnetic conductive plate. . In this embodiment, the travel switch may only include the first magnetic conductive pad, and the first magnetic conductive pad may be disposed on the upper end surface of the magnet. That is to say, in this embodiment, the blocking ring, the first magnetic conductive pad and the first magnetic conductive plate only need to jointly block the magnetic field of the magnet toward the first trigger member side (for example, when the movement direction of the feedback rod is perpendicular to the first magnetic field) when triggering the surface). In addition, in the second embodiment, the above description still applies to the accommodating relationship between the magnet, the magnetic conductive pad mounted on the magnet, and the blocking portion.

According to the features described above, part of the manufacturing process and usage scenarios of the travel switch will be specifically described below. Taking the first embodiment of the travel switch as an example to illustrate, in the embodiment, the first magnetic conductive pad 6 and the second magnetic conductive pad 7 can be installed on the magnet 4 by fasteners such as screws, or by rolling. For installation, the blocking ring 5, the first magnetic conductive plate 8, and the second magnetic conductive plate 9 can also be formed as a whole in the above-mentioned way. More room for adjustment by technicians. Alternatively, the blocking ring 5, the first magnetic conductive plate 8 and the second magnetic conductive plate 9 can be formed into an integral molding structure, which is suitable for situations where the requirements for the stroke are relatively fixed, and the assembly time is reduced. Similarly, the manufacturing process of the blocking ring and the first magnetic conducting plate in the second embodiment can also be similar to the above-mentioned one-piece molding or separate assembly, and the beneficial effects thereof are the same, which will not be repeated here.

For the usage scenario, the holding area of the magnetic induction limit switch in the prior art (the magnet 4 is located in this area, the action of the magnetic field makes the two reeds insufficient to attract) in the induction area (when the magnet 4 is located in this area, the two Except for one reed pull-in), the range of the holding area is usually 3mm to 8mm, so the stroke of the magnet 4 must be increased to control the normal on-off of the circuit, so it cannot be used in small stroke scenarios. In addition, in the face of harsh environments such as high temperature, high pressure, and irradiation, it is necessary to isolate these environments from the components of the limit switch to form a shielded structure. In the shielded structure, the limit switch is usually caused by the invisible magnet 4. After installation, it needs to be debugged many times, which wastes manpower and material costs and increases security risks.

The travel switch provided in this embodiment is actually equivalent to realizing the sudden increase and disappearance of the magnetic field around the reed, so that the holding area is located within the sensing area, which effectively reduces the travel required by the feedback lever 3, so it can be applied to Small stroke application scenarios, while making it possible to use magnets with higher magnetic field strengths. In addition, due to the accuracy, no adjustment is required after installation, which saves time and cost. By using a high-permeability magnetic material and a suitable magnet 4, the stroke of the travel switch in this embodiment can be controlled to be less than is equal to the range of 1mm.

The above are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Under the innovative conception of the present application, the equivalent structure transformation made by the contents of the description and drawings of the present application, or the direct/indirect application All other related technical fields are included in the protection scope of this application.

Claims (10)

1. A travel switch comprising a first trigger member and a second trigger member, the first trigger member and the second trigger member each comprising a first trigger portion and a second trigger portion separated from each other; Under the action of the magnetic field, the first trigger part and the second trigger part can be in contact with each other; it is characterized in that the travel switch further comprises: a moving member, capable of movement and mounted with a magnet; a blocking member formed with a blocking portion; In the first position of the moving member, the magnet is bounded by the blocking portion in such a way that the magnetic field of the magnet acting on the first triggering portion and the second triggering portion is blocked, so that the the first trigger part and the second trigger part are separated from each other; When the moving member moves to the second position, the first trigger portion and the second trigger portion of the first trigger member contact each other under the action of the magnetic field of the magnet; When the moving member moves to the third position, the first trigger portion and the second trigger portion of the second trigger member contact each other under the action of the magnetic field of the magnet. 2. The travel switch according to claim 1, wherein the travel switch comprises: a first mounting member, the first trigger member is mounted on the first mounting member; a second mounting member facing the first mounting member, the second trigger member being mounted to the second mounting member; defining a surface of the first mounting member facing the second mounting member as a first trigger surface, and defining a surface of the second mounting member facing the first mounting member as a second trigger surface; The blocking member is mounted such that the blocking portion is located between the first trigger surface and the second trigger surface. 3. The travel switch according to claim 2, characterized in that, The blocking part is formed as a blocking through hole, and in the first position of the moving member, the magnet is located inside the blocking through hole; in the second position and the third position of the moving member, the magnet at least partially outside the blocking via; The moving direction of the moving member is perpendicular to the first trigger surface, and the first mounting member and the second mounting member are each formed with a hole corresponding to the blocking through hole for the moving member to penetrate department. 4. The travel switch according to claim 3, wherein the travel switch further comprises: a third magnetic conductive member covering the side of the blocking member facing the first trigger surface, the third magnetic conductive member is connected with the first mounting member; a fourth magnetic conductive member covering the side of the blocking member facing the second trigger surface, the fourth magnetic conductive member is connected with the second mounting member; a hole portion of the third magnetic conductive member and the fourth magnetic conductive member corresponding to the blocking through hole, through which the moving member passes; When viewed along the direction of motion of the moving member: The third magnetic conductive member overlaps with the first trigger member, and a portion of the fourth magnetic conductive member overlaps with the second trigger member. 5. The travel switch according to claim 4, wherein the travel switch further comprises: a first magnetic conductive member covering the side of the magnet facing the first trigger surface; a second magnetic conductive member covering the side of the magnet facing the second trigger surface; The sum of the dimensions of the third magnetically conductive member, the blocking member and the fourth magnetically conductive member in the moving direction of the moving member is greater than or equal to the first magnetically conductive member, the magnet and the The sum of the dimensions of the three second magnetically conductive members in the moving direction of the moving member. 6. The travel switch according to claim 5, characterized in that, The third magnetic conductive member, the fourth magnetic conductive member and the blocking member are integrally formed; or The third magnetically conductive member, the fourth magnetically conductive member and the blocking member are assembled and formed as a whole. 7. A travel switch, comprising a first trigger member, the first trigger member comprising a first trigger portion and a second trigger portion separated from each other; under the action of a magnetic field, the first trigger portion can interact with the second trigger portion It is characterized in that, the travel switch further includes: a moving member, capable of movement and mounted with a magnet; a blocking member formed with a blocking portion; In the first position of the moving member, the magnet is limited by the blocking portion in such a way that the magnetic field of the magnet acting on the first trigger member is blocked, so that the first trigger portion is connected to the first trigger member. The two trigger parts are separated from each other; When the moving member moves to the second position, the first trigger member makes the first trigger part contact the second trigger part under the action of the magnetic field of the magnet. 8. The travel switch according to claim 7, wherein the travel switch further comprises: a first mounting member, the first trigger member is mounted on the first mounting member; The blocking member and the first mounting member face each other, and a plane on which a surface of the first mounting member facing the blocking member is defined is a first trigger surface. 9. The travel switch according to claim 8, characterized in that, The blocking portion is formed as a blocking through hole, in the first position of the moving member, the magnet is located inside the blocking through hole, and in the second position of the moving member, at least part of the magnet is located in the moving member. the outside of the blocking through hole; The moving direction of the moving member is perpendicular to the first trigger surface, and the first mounting member is formed with a hole portion corresponding to the blocking through hole through which the moving member penetrates. 10. The travel switch according to claim 9, wherein the travel switch further comprises: A third magnetic conductive member covers the side of the blocking member facing the first trigger surface, the third magnetic conductive member is connected to the first mounting member, and is formed with a through hole connected to the blocking member a corresponding hole through which the moving member passes; a first magnetic conductive member covering the side of the magnet facing the first trigger surface; When viewed along a direction perpendicular to the first trigger surface, a portion of the third magnetically permeable member overlaps the first trigger member; The third magnetically conductive member and the blocking member are integrally formed; or both the third magnetically conductive member and the blocking member are assembled to form an integral body.

Images