JPH07263U - Elastic joining means for scissors blades - Google Patents

Abstract

(57) [Abstract] [Purpose] It can be applied to hinge connection of scissors blades in particular, it is inexpensive, greatly reduces the assembly time, achieves a reliable connection, To provide a joining means for two rocking members, which makes it possible to adjust the tightening of the two parts. The joining means comprises one member 2 including a hinge connecting pin 4 provided with a holding collar 6, and this pin 4
It is applied to a rocker part consisting of another member 3 provided with a hole 8 for passing through, the pin 4 cooperating with a fixing finger part 9, the shaft 9a of this finger part being Hole 5 in pin 4
It is inserted in the state of being clamped inside. Its head 9b
Has a bowl-like shape with the recess facing the axis 9a,
It has a circular edge 10 with a diameter larger than the outer diameter of the collar 6 and the contact of this edge 10 with the member 3 prevents axial translational movement of these two members 2, 3. In addition, the friction adjustment of these members 2 and 3 is performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to elastic joining means for scissors blades.

[0002]

[Prior art]

 Conventionally, the blade of scissors is fixed with a stepped screw, and the thread part of this stepped screw is screwed into the female thread of one blade and fixed, and the stepped part prevents translational movement by the head of this screw. It is housed playfully in the appropriate hole in the other blade, which has been cut.

This commonly used hinge connection structure is not suitable for scissors made of synthetic material, because this material has a low coefficient of friction and promotes screw loosening. Furthermore, although the use of synthetic material blades is aimed at obtaining inexpensive goods, the installation of screws requires assembly work which increases the cost of the final product.

In US Pat. No. 4,0075,24, two scissors made of synthetic material by bending the ends of a split-well shaped pin protruding from one blade and fitted into the hole of the other blade are described. A description of the permanent connection between the blades has been given. This technique makes it impossible to control the tightening of the two blades due to manufacturing tolerances and then to make adjustments to this tightening to compensate for wear, which results in It has the disadvantage that the sharpness of the scissors gradually deteriorates over time.

[0005]

[Problems to be solved by the device]

 INDUSTRIAL APPLICABILITY The present invention can be applied especially to hinged connection of scissors blade, which is inexpensive, greatly reduces the assembly time, provides a reliable connection, and these two parts even during assembly and after use. It is an object of the invention to eliminate the above-mentioned disadvantages by providing a connecting means for two rocking members which makes it possible to adjust the tightening of the.

[0006]

[Means for Solving the Problems]

 According to the invention, the above-mentioned object is to provide an elastic joining means for the two rocker members, in particular one comprising a hinge connecting pin of the retaining collar and the other with a hole for passing said pin. Is an elastic joining means of scissors blades made of molded synthetic material, in which the pin cooperates with a locking finger, the shaft of which is clamped in the hole of the pin The head part of this finger-shaped part has a bowl-like shape with the recess facing in the axial direction, and has a circular edge with a diameter larger than the outer diameter of the collar. By contacting the hinged members, axial translational movements of these two members are prevented and the friction of these members is adjusted.

[0007]

[Effect of device]

 In the present invention, the pin cooperates with a locking finger having a shaft that can be clamped into the hole of the pin. The head of this finger-shaped part has a bowl-like shape with the recess facing in the axial direction, and also has a circular edge with a diameter larger than the outer diameter of the collar, and this edge is the hinge. By contacting the connected members, they act as an axial translational movement preventing means for these two members as well as a friction adjusting member for these members. As a result, in order to join these two members, the pin of the first member only has to be fitted into the hole of the second member, which causes the pin to be elastically deformed. The collar is radially compressed, and then as soon as this collar is repositioned in the hole by the elastic force, the locking finger is fitted into the hole and the connection obtained is solid. At the end of this force-fitting insertion, the pin is unable to deform radially and the head of the finger is supported via its peripheral edge on the intermediate member, As a result, it contributes to the prevention of translational motion.

Due to the elasticity of the head, this fixing to prevent the translational movement is elastic and the manufacturing tolerances of the two parts, in particular the tolerances during molding, make it difficult to avoid these two parts. Whatever the dimensional difference may be, a connection and a sufficient tightening of these two parts can be guaranteed.

[0009]

【Example】

 The invention can be more clearly understood by the description given below with reference to the drawings, which shows one embodiment of this joining means when applied to the joining of two branches of scissors.

In FIG. 1, the scissors are constituted by two blades 2 and 3 obtained by molding a synthetic material. The blade 2 is integrated with a hinge connecting pin 4 including an axial hole 5 penetrating therethrough. The pin 4 integrally has an external collar 6 at its free end. The pin 4 includes a groove 7 in the longitudinal direction communicating with the hole 5 in a portion protruding from the blade 2. The number of these grooves 7 is 2 to 8, and when the pin 4 is fitted into the hole 8 provided in the blade 3 including the chamfered portion 3a (FIG. 3) for facilitating fitting, It allows the wall of the pin to be deformed.

As shown in FIG. 3, when the pin 4 is fitted into the hole 8, the collar 6 of the pin 4 is ejected from this hole 8 (when it is ejected, the natural elasticity of the pin 4 causes The pin 4 can be set to the initial position again by spreading the collar 6 on the upper surface of the blade 3. The hole 8 is radially restrained. At this stage of assembly, the blade 3 is rotatably connected to the blade 2 and the collar 6 prevents translational movement of the blade 3 relative to this blade 2.

In the present invention, the connection between the blade 2 and the blade 3 is finished by inserting the fixing finger-shaped component 9 into the hole 5. The cylindrical shaft 9a of this finger-like part is press-fit in the bore 5 against any radial contraction of the pin 4. The head portion 9b of the finger-shaped component 9 has a bowl-shaped overall shape in which the concave portion faces the direction of the shaft 9a. The edges of this bowl-shaped part form a circular edge 10 having a diameter larger than that of the color 6 and, as a result, is shown in FIG. As described above, the aforementioned edge 10 is supported on the outer surface of the blade 3.

In this position, due to the elastic properties of the head 9b, the fixing finger 9 is provided with an axial elastic clamping which allows these scissors to function satisfactorily even after a long time. It is transmitted to the blade and contributes to preventing translational movement of the blade 3 with respect to the blade 2.

The head 9b also serves as a decorative part and can have any concave or convex motif which gives it a screw head or other shape.

Although described above in the context of its application to the connection of two blades of scissors, such joining means are also used to join any rocking part that can be joined in pairs. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of scissors in an assembled state.

FIG. 2 is a partial cross-sectional view showing a pin of a first blade.

FIG. 3 is a partial cross-sectional view showing the joining of two blades.

FIG. 4 is a partial cross-sectional view showing fixing of joining of two blades.

[Explanation of symbols]

 2 blade 3 blade 3a chamfer 4 pin 5 hole 6 collar 7 groove 8 hole 9 finger part 9a shaft 9b head 10 circular edge

Claims (1)

[Scope of utility model registration request] 1. An elastic joining means for two rocking members, in particular a hinge connecting pin (4) of which one is a retaining collar (6).
Hole for receiving the pin (8), the other containing the pin (8)
Is a resilient joining means of the scissors blades (2, 3) made of molded synthetic material comprising a pin (4) cooperating with a fixing finger (9), ) Axis (9
a) is inserted into the hole (5) of the pin (4) in a tightened state, and the head (9) of this finger-like component (9) is inserted.
b) has a bowl-like shape in which the recess faces the axis (9a) direction, and has a circular edge (10) having a diameter larger than the outer diameter of the collar (6). The contact of 10) with the hinged members (3) prevents axial translation of these two members (2, 3) and regulates the friction of these members (2, 3). An elastic joining means for scissors blades, characterized in that: