JPH0248904Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a new connection link mounting structure. Specifically, the movable member is provided with a movable member and an operating lever, and the movable member is rotatably supported on the machine frame side, is always urged in one direction by an elastic means, and is connected via a connecting link. This invention relates to a structure for attaching a connecting link in a mechanism that is moved by a lever, and has a relatively simple structure that allows the work of attaching the connecting link between the movable member and the operating lever to be performed in approximately one operation. It is an object of the present invention to provide a new connecting link mounting structure that can be attached to the connecting link without using a special holding member.

PRIOR ART For example, in a mechanism including a movable member rotatably supported on a machine frame, an operating means for moving the movable member in a predetermined direction is a mechanism that is rotatably supported on the machine frame and An operating lever is often used, the rotating end of which is connected to the rotating end of the movable member. If such a control lever and a movable member cannot be directly connected for some reason, generally the rotating end of the movable member and the connecting rotating end of the operating lever are connected to an appropriate link. It is being done to connect them by twisting them.

Incidentally, the structure for attaching the connecting link between the movable member and the operating lever in such a mechanism has conventionally generally been of the following structure.

That is, connecting pins are provided protruding from the rotating end of the movable member and the connecting side rotating end of the operating lever, and insertion holes are formed at both ends of the connecting link, and the connecting pin is inserted into the insertion hole of the connecting link. It had a structure in which a pin was inserted so as to be rotatable, and a retaining member such as an E-ring was provided at the tip of the connecting pin.

Problems to be Solved by the Invention However, according to the above-mentioned conventional connection link mounting structure, the installation work requires at least the operation of inserting the connection pin on the movable member side into the insertion hole on one side of the connection link, and the operation. It is necessary to insert the connecting pin on the lever side into the insertion hole on the other side of the connecting link, and to attach the retaining member to the connecting pin.Moreover, the work of inserting the connecting pin into the insertion hole is surprisingly troublesome. It is something. That is, the conventional connecting link mounting structure has a problem in that the mounting work is troublesome. In particular, work requiring the above-mentioned operations becomes extremely troublesome when the connecting link is placed inside the side plate of the machine frame of the mechanism in question, and in such cases, Special jigs and tools may be required for installation.

Means for Solving the Problems Therefore, the mounting structure of the connecting link of the present invention was devised to solve the above-mentioned problems. It has a movable member that is always biased in one direction, an operating lever, and a connecting link that connects the movable member and the operating lever, and when the operating lever is operated, the A mounting structure for a connecting link in a mechanism capable of moving the movable member in a predetermined direction, wherein the movable member and the operating lever are each provided with an engaging portion, and both ends of the connecting link are engaged. forming a mating part, one engaging part of the connecting link is engaged with the engaging part of the movable member, and the other engaging part is engaged with the engaging part of the operating lever, and the movable member The engagement state between the engaging portion of the operating lever and the engaging portion of the connecting link is maintained by the pressing force of the elastic means, so that the connecting link is connected to the movable member and the operating lever. It is characterized by being attached between the two.

Effect Therefore, according to the present invention, one of the engaging portions of the connecting link is engaged with the engaging portion of the movable member, and
The connecting link can be installed between the movable member and the operating lever by an extremely simple operation such as engaging the other engaging part of the connecting link with the engaging part of the operating lever, so the installation work can be simplified. This can be done in approximately one operation.

The attached state of the connecting link installed between the movable member and the operating lever is such that the pressing force of the elastic means applied to the movable member pushes the engaging portion of the connecting link to each engaging portion of the movable member and the operating lever. It is held securely by pressing against it.

Embodiments Below, details of the mounting structure of the connecting link of the present invention will be explained according to embodiments shown in the accompanying drawings. still,
In the embodiment shown in the drawings, the connecting link mounting structure of the present invention is applied as a connecting link mounting structure installed between a print head and an operating lever in a print head mechanism of a printer.

1 in the figure is a printer to which the connecting link mounting structure of the present invention is applied.

2 is the outer casing of the printer 1, and its front panel 3
can be opened forward, and its top plate 4 can be opened upward.

Reference numeral 5 denotes a lower machine frame provided at the lower part of the portion of the outer casing 2 near the front plate 3, and an upper machine frame 6 is fixed onto the lower machine frame 5. The movable member 6 has a bottom plate 7 fixed to the lower machine frame 5, and side plates 8, 8' integrally formed upright from both left and right edges of the bottom plate 7, so that the movable member 6 has a general shape when viewed from the front and rear directions. It is formed.

9 is a platen. The platen 9 has both ends 10 of a platen shaft protruding from both left and right end surfaces thereof.
Bearing members 11, 1 10' are provided near the front edges of the left and right side plates 8, 8' of the upper machine frame 6.
1 (only the one provided on the left side plate 8 is shown in the drawing), and is rotatably supported by the
Platen gear 1 is attached to the right end 10' of the platen shaft.
2 is fixed.

Reference numeral 13 denotes a substantially rectangular gear board disposed inside the right side plate 8' of the upper machine frame 6 at a certain distance from the side plate 8'. Installed mounting boss 14,1
4, . . . are fixed to the side plate 8' by fastening screws 15, 15, . . . inserted into the side plate 8' from the outside. 16 is the gear board 13
It is a motor fixed to the surface on the opposite side plate 8' side,
The tip of the output shaft 17 penetrates the gear base plate 13 and projects toward the side plate 8', and an output gear 18 is fixed to the tip. 19 is gear board 1
3 is a transmission gear provided at a position near the front edge, and one end of the transmission gear 19 is supported by a bearing member (not shown) provided on the gear base plate 13, and
The other end is rotatably supported by a gear support shaft 20 supported in a bearing hole 21 provided in a side plate 8' of the machine frame 6, and is meshed with the platen gear 12 and output gear 18.

Therefore, when the motor 16 is rotated, the rotation is caused by the rotation of the output shaft 17 - output gear 18 - transmission gear 19.
- transmitted to the platen shaft via a path connected to the platen gear 12, thereby causing the platen 9 to rotate in the counterclockwise direction in FIG.

22 is a print head mechanism (see FIG. 1). The print head mechanism 22 includes a print head for printing, a pressing means for pressing the print head toward the platen 9, and an operating means for moving the print head away from the platen 9. Each of the above-mentioned parts constituting the print head mechanism 22 will be explained below.

23 is a print head. The print head 23 includes a head substrate 24 formed in a substantially plate shape.
, a heating element support 25 made of glass and having a substantially round bar shape fixed to a position near the front edge of the lower surface of the head board 24, and a heat sink attached to cover the head board 24 from above. 26, and a head shaft 27 extending in the left-right direction is provided at the rear end of the heat sink 26. still,
Although not shown in the drawings, the heating element support 25 is provided with a large number of resistor heating elements arranged in the axial direction thereof, and the head board 24 is provided with heat generating elements that operate to generate heat from the resistor heating elements. A predetermined control circuit is provided to control the.

Thus, the print head 23 is rotatably supported by the upper machine frame 6 at both ends of its head shaft 27, and the heating element support 25 is located at a portion substantially at the top of the outer peripheral surface of the platen 9. and are being contacted.

Reference numeral 28 denotes a spring mounting member formed so that its cross-sectional shape is approximately shaped, and the spring mounting member 28 has fixing pieces 29, 29' integrally formed at both ends in the longitudinal direction.
Body rear side pieces 30, 3 facing each other substantially parallel to each other
The slits 31, 3 are located near the left and right ends of 0'.
1' and 32, 32' are formed to face each other in the front-rear direction. Further, 33 and 34 are coil springs, and rings 33a and 34a at the upper ends of the coil springs 33 and 34
The diameter of the part is larger than that of other parts. One of the coil springs 33 has a ring 33a at the upper end of which a portion separated by approximately 180 degrees from each other is connected to a left slit 3 formed in the spring mounting member 28.
1 and 31', and the other coil spring 34 is engaged with the rings 34a at the upper end thereof, and the other coil spring 34 is engaged with the rings 34a at the upper end thereof.
The portions spaced apart by 180° are engaged with the right slits 32, 32' formed in the spring mounting member 28,
Thereby, the coil springs 33 and 34 are attached to the spring attachment member 28.

Thus, the lower ends of the coil springs 33 and 34 attached to the spring mounting member 28 are brought into contact with the front end of the print head 23 from above and are compressed by a predetermined amount. 29' are fixed to the left and right side plates 8, 8' of the upper machine frame 6 by screws 35, 35, . . . . As a result, the coil springs 33 and 34 are placed in a compressed state to create a predetermined spring pressure between the print head 23 and the spring mounting member 28, so that the print head 23
is pressed so that the heating element support 25 is brought into contact with the outer peripheral surface of the platen 9 with a predetermined pressure.

35 connects the print head 23 described above at any time.
This is an operating lever for moving to the side opposite to the platen 9. The operating lever 35 is arranged along a portion of the inner surface of the left side plate 8 of the upper machine frame 6 that is closer to the bottom plate 7, and is formed into a substantially L-shape when viewed from the left side. The bending point position is side plate 8
It is rotatably supported by a lever support shaft 36 projecting from the lever. Reference numeral 37 designates an engagement pin that protrudes substantially horizontally from the tip of the shorter arm 35a of the operating lever 35 toward the left side, and the engagement pin 37 has a large diameter stopper 38 integrated at its base end. A head 39 is integrally formed at the tip thereof.

Reference numeral 40 designates an engagement pin that projects approximately horizontally toward the left side from a position near the front end of the left side surface of the print head 23, and a head 41 is integrally formed at the tip of the engagement pin 40. has been done.

Reference numeral 42 denotes a guide slit formed in the left side plate 8 of the upper machine frame 6, and this guide slit 42 is for regulating the rotation range of the operating lever 35. The front end of the guide slit 42 is connected to the side plate 8.
An imaginary straight line ( (See Figure 1) 43
(Hereinafter, this line will be referred to as the "click boundary line.") It extends to a slightly more posterior position. The rear portion of the lower edge of the guide slit 42 is formed so as to substantially follow the locus of movement of the lower surface of the stopper 38 of the operating lever 35, which is rotated about the support shaft 36.

As shown by the solid line in FIG. When the stopper 38 reaches the rear end edge of the guide slit 42, as shown by the two-dot chain line in FIG. By coming to the position where it comes into contact with (hereinafter this position is referred to as the "push-up position"),
This prevents rotation in the counterclockwise direction.

44 indicates the print head 23 and the operating lever 3.
5, the connecting link 44 is curved forward at its middle portion, and has approximately U-shaped notches 45a, which are opened on both sides facing oppositely to each other. 45b is formed. Note that the width of these notches 45a and 45b is approximately equal to the outer diameter of each of the engagement pins 37 and 40.

Thus, the connecting link 44 is attached between the print head 23 and the operating lever 35, for example, in the following manner. That is, while the operating lever 35 is in the non-pushing position due to its own weight, for example, while lifting the front end of the print head 23 slightly upward, the lower notch 45a of the connecting link 44 is moved toward the operating lever 35 side. The engagement pin 37 is engaged with the portion between the stopper 38 and the head 39, and the upper notch 45b is engaged with the left side surface of the print head 23 and the head 41 of the engagement pin 40 on the print head 23 side. This removes the force that was lifting the print head 23 upward. In this state, the connecting link 44 is moved in the vertical direction with its notches 45a and 45b at both upper and lower ends engaged with the engaging pin 37 on the operating lever 35 side and the engaging pin 40 on the print head 23 side. Movement is prevented, and the lower end is engaged by the stopper 38 and the head 41 of the engagement pin 37, and the upper end is engaged by the head 41 of the engagement pin 40 and the left side of the print head 23. pin 3
7, 40 in the axial direction thereof.

Note that when the operating lever 35 is in the non-push-up position, the upper notch 4 of the connecting link 44
The lower end edge of the engagement pin 5b is slightly spaced apart from the outer circumferential surface of the engagement pin 40. This is because, in this state, the pressing force applied to the print head 23 by the coil springs 33 and 34 is applied to the print head 23.
This is to prevent it from being added to other members.

From the state shown by the solid line in FIG. 1, that is, the state in which the heating element support 25 of the print head 23 is in contact with the outer peripheral surface of the platen 9, the longer arm 35b of the operating lever 35 is moved, for example. When the stopper 38 is pressed upward with a fingertip or the like and rotated until it comes into contact with the rear edge of the guide slit 42, the stopper 41 comes to the rear of the click boundary line 43, so that the coil springs 33 and 34 The pressing force applied to the print head 23 thus acts as a force that tends to rotate the operating lever 35 in the counterclockwise direction in FIG.
As a result, as shown by the two-dot chain line in Figure 1,
The operating lever 35 is held in the pushed-up position, and the print head 23 is held in a position spaced upward from the platen 9. That is, the operating lever 3
Since the engagement pin 38 of No. 5 moves upward until it reaches the click boundary line 43, the notch 45b on the upper side of the connecting link 44 also moves upward.
This causes the front end of the print head 23 to be lifted upward. And engagement pin 3
8 moves slightly downward while moving from the click boundary line 43 to the rear end of the guide slit 42, since it is higher than in the non-pushed position. Also, from the state shown by the two-dot chain line in FIG.
The pressing force applied to the print head 23 by the printer 34 in turn acts as a force to rotate the operating lever 35 in the clockwise direction.
is returned to the position shown by the solid line in FIG. Reference numeral 46 denotes a print paper in the form of a roll paper, and the print paper 46 is loaded into a paper storage section inside the lower machine frame 5. Further, 47 (see FIG. 3) is a paper guide, and its upper end portion is arranged along a portion of the outer circumferential surface of the platen 9 between the rear part and the slightly lower part, and is arranged at a distance from this. The lower end portion thereof is disposed at a position slightly forward from the front edge of the bottom plate 7 of the upper machine frame 6.

Thus, the print paper 46 loaded in a predetermined paper storage section has a path along the front surface of the other end of the paper guide 47 and is wound around a portion of the outer peripheral surface of the platen 9 from the rear to the top. After being passed through, approximately the platen 9 of the front plate 3
The paper exits from the outer casing 2 through a paper ejection port (not shown) formed at a position corresponding to the front of the paper.

The printing paper 46 is loaded into the paper storage section with the front plate 3 of the outer casing 2 opened forward, and the work of passing the printing paper 46 through the above-mentioned path is carried out by moving the operating lever 35 as described above. By performing the above operations, the print head 23 is moved above the platen 9 as shown by the two-dot chain line in FIG. Although not shown, an ink ribbon with an ink layer formed on one side is loaded at a predetermined position in the outer casing 2. The surface of the print paper 46 is the platen 9.
The printing paper 46 is configured to come into contact with the portion wound around the upper portion of the outer peripheral surface of the printing paper 46 and run together with the printing paper 46.

When a print command is issued, the motor 16 is rotated, which rotates the platen 9, so that the print paper 36 is connected to the heating element support 25 of the print head 23 via an ink ribbon (not shown). They are driven in contact with each other. Then, at a position in contact with the heating element support 25, ink corresponding to a resistor heating element (not shown) that generates heat in accordance with a predetermined print signal is dissolved and transferred onto the printing paper 46, and thereby Then printing is done.

Effects of the invention As is clear from the above description, the mounting structure of the connecting link of the invention is rotatably supported on the machine frame side and is always urged in one direction by the resilient means. A movable member, an operating lever,
A connecting link in a mechanism that has a connecting link that connects the movable member and the operating lever, and the movable member can be moved in a predetermined direction via the connecting link by operating the operating lever. In the mounting structure, the movable member and the operating lever are each provided with an engaging portion, and
Engaging portions are formed at both ends of the connecting link, one engaging portion of the connecting link is engaged with the engaging portion of the movable member, and the other engaging portion is engaged with the engaging portion of the operating lever. The engaging portions of the movable member and the operating lever are maintained in the engaged state by the pressing force of the resilient means, thereby causing the connecting link to It is characterized in that it is attached between the movable member and the operating lever.

Therefore, according to the present invention, one of the engaging portions of the connecting link is engaged with the engaging portion of the movable member, and
The connecting link can be installed between the movable member and the operating lever by an extremely simple operation such as engaging the other engaging part of the connecting link with the engaging part of the operating lever, so the installation work can be simplified. This can be done in approximately one operation.

The attached state of the connecting link installed between the movable member and the operating lever is such that the pressing force of the elastic means applied to the movable member causes the engaging portion of the connecting link to engage with each of the movable member and the operating lever. The movable member is reliably held by acting in a manner such that it presses against the part, or by preventing the movable member from moving toward the side opposite to the operation lever due to the pressing force.

In the above-described embodiment, pins are provided as the engaging portions on the movable member (print head) side and the operating lever side, which are moved in a predetermined direction at any time, and a pin approximately U is provided as the engaging portion on the connecting link side.
Although the notch is formed in the shape of a letter, each engaging part in the present invention is such that the engaging state of the engaging part of the movable member and the operating lever and the engaging part of the connecting link is the same as that of the movable member. Any form may be used as long as it is held by the pressing force of the resilient means applied to the spring.

Furthermore, in the above-mentioned embodiments, the connecting link is arranged on the outside of the side plate of the machine frame, but in the present invention, the connecting link is arranged inside the side plate of the machine frame of the mechanism. The present invention can also be applied to other cases, and particularly in such cases, the present invention has excellent effects.

[Brief explanation of the drawing]

The drawings show an example of an embodiment in which the coupling link attachment structure of the present invention is applied as a coupling link attachment structure in a print head mechanism of a printer. FIG. 1 is an enlarged side view showing the print head mechanism with a portion cut away; Figure 2 is a front view showing the entire printer with a part of the outer casing cut away, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is a perspective view showing the main parts of the printer, and Figure 4 is a perspective view showing the main parts of the printer. FIG. 5 is an enlarged perspective view showing a partially exploded print head mechanism. Explanation of symbols, 6...Machine frame, 23...Movable member,
33, 34... explosive means, 35... operating lever,
37...Engagement part (of the operating lever), 40...Engagement part (of the movable member), 44...Connection link, 45
a, 45b...Engaging portion (of the connecting link).

Claims (1)

[Scope of claim for utility model registration] The firing means 3 is rotatably supported on the machine frame 6 side and
3 and 34, a movable member 23 that is always urged in one direction, an operating lever 35, and a connecting link 44 that connects the movable member 23 and the operating lever 35, the operating lever 35, the movable member 23 is connected to the movable member 23 and the operation lever 35, respectively. In addition to providing the connecting portions 40 and 37, engaging portions 45b and 45a are formed at both ends of the connecting link 44, and one engaging portion 45b of the connecting link 44 is engaged with the engaging portion 40 of the movable member 23. At the same time,
The other engaging portion 45a is engaged with the engaging portion 37 of the operating lever 35, and the engaging portions 40, 37 of the movable member 23 and the operating lever 35 are engaged with the engaging portion 4 of the connecting link 44.
5b, 45a is the resilient means 33,
A connecting link mounting structure characterized in that the connecting link 44 is attached between the movable member 23 and the operating lever 35 by being held by a pressing force of 34.