JPH0135935Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a mounting structure for a fulcrum shaft for rotatably mounting a lever, etc., and is particularly effective when used on a vibrating body such as an automobile. Regarding the shaft mounting structure.

[Technical background of the invention]

A conventional fulcrum shaft mounting structure is shown in FIG.

Reference numeral 1 denotes a fulcrum shaft, and grooves 3 are provided at both ends of the fulcrum shaft 1 for attaching, for example, an E-ring 2 as a retaining ring. Reference numeral 4 denotes a holder for attaching the fulcrum shaft 1, and side plates 6 having holes 5 into which the fulcrum shaft 1 is inserted are provided on the left and right sides of the holder 4. To attach the fulcrum shaft 1 to the holder 4, insert the fulcrum shaft 1 into the hole 5, and insert the fulcrum shaft 1 into the groove 3.
This is done by attaching an E-ring to the

[Problems with background technology]

However, in the conventional mounting structure described above, the fulcrum shaft 1 is prevented from coming out of the hole 5 by the E-ring 2.
Since the structure is only prevented by the fulcrum shaft 1 and the holder 4, the radial gap (hole 5
and the axial diameter of the fulcrum shaft 1) and the axial clearance (gap due to errors in the thickness of the E-ring 2, the width of the groove 3, the distance between the grooves, the spacing between the side plates, etc.) As a result, the fulcrum shaft 1 was rattling. Therefore, when a device having this type of mounting structure is attached to a vibrating body such as an automobile, abnormal noise is generated from inside the device due to rattling of the fulcrum shaft 1.

Furthermore, the E-ring 2 is difficult to grasp and is difficult to attach to the groove 3, resulting in a decrease in the efficiency of the attachment work of the fulcrum shaft 1. Furthermore, when attaching the E-ring 2, there are cases where the E-ring 2 is thrown into the equipment, and such E-rings remain inside the equipment and cause the equipment to malfunction.

[Purpose of invention]

The present invention has been developed in view of the above-mentioned drawbacks of the conventional fulcrum shaft, which does not generate abnormal noise even when used in vibrating bodies such as automobiles, and which has good efficiency when attaching the fulcrum shaft. The purpose is to provide a mounting structure for.

[Summary of the idea]

Therefore, in the mounting structure of the fulcrum shaft of the present invention, a threaded part having a screw head is formed on one end side, and the shaft diameter of the non-threaded part connected to this threaded part is the diameter of the screw hole into which the threaded part is screwed. a fulcrum shaft having a diameter smaller than an inner diameter; a first holding member having a threaded hole that is screwed into the threaded portion and holding the threaded portion side of the fulcrum shaft with the threaded hole; a second holding member which is provided at a distance from the first member, has a hole into which the non-threaded portion fits, and holds the non-threaded portion of the fulcrum shaft in the hole; Second
When the holding member is held, the distance between the surface of the first holding member that locks the screw head and the surface of the second holding member that faces the first holding member is the non-threaded holding member. The above objective is achieved by providing the length smaller than the length of the section.

[Example of idea]

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

FIG. 1 is an exploded perspective view showing a mounting structure of a fulcrum shaft in a mechanical latch unit for fixing a handset of a car telephone.

The holder 10 is provided with a handle lever (not shown) for fixing the handset (not shown), and when the handset is not in use,
The handset is secured to the cradle of a telephone mounted in a car by means of this foot lever. Reference numeral 12 denotes a release lever for releasing the fixation of the handset by pressing the foot lever. The release lever 12 is attached to the holder 1 by the fulcrum shaft 13.
0 is rotatably attached to the release lever 1.
By rotating the lever 2, the aforementioned foot lever is pressed.

Incidentally, in equipment attached to a vibrating body such as an automobile, abnormal noise generated by vibration becomes a problem. Therefore, in this embodiment, the release lever 12 and the fulcrum shaft 13 are attached in the following manner to prevent abnormal noise from occurring due to vibration. Incidentally, a similar configuration is adopted for a foot lever (not shown).

An elastic tongue piece 15 is provided on the side of the pressing plate 14 of the release lever 12 (this part presses the lever), and the release lever 12 is attached to the holding members 16 and 17 of the holder 10. The tongue piece 15 is configured to press the side surface 40 of the holding member 16 with a constant pressure when attached between the two. Therefore, although the release lever 12 is rotatable about the fulcrum shaft 13, the holder 10
The tongue piece 15 absorbs the rattling caused by the vibration, thereby preventing the generation of abnormal noise due to vibration. In addition, tongue piece 15
The diameter of the hole 19 formed in the hole 19 is larger than the outer diameter of a threaded portion 21, which will be described later. Therefore, when the lever 12 is attached to the holder 10 by the fulcrum shaft 13, the threaded part 21 is inserted into the hole 19, so the function of the tongue piece 15 that presses the holding member 16 is not impaired by the threaded part 21. do not have.

Next, the mounting structure of the fulcrum shaft 13 will be explained using FIGS. 2 and 3.

A threaded portion 21 having a screw head 20 is formed at one end of the fulcrum shaft 13, and the outer diameter of the threaded portion 21 is larger than the shaft diameter of the non-threaded portion 22.

On the other hand, the holding member 16 (first holding member) of the holder 10 has a screw hole 24 which is screwed into the threaded part 21.
A hole 25 having an inner diameter larger than the shaft diameter of the non-threaded portion 22 is formed in the holding member 17 (second holding member). Furthermore, a surface 26 of the holding member 16 that locks the screw head 20 when the fulcrum shaft 13 is inserted into the screw hole 24 from the direction of the arrow shown by the dashed line in FIG. The holding members 16 and 17 are positioned such that the distance X from the surface 27 is smaller than the length Y of the non-threaded portion 22.

The attachment of this support shaft 13 to the holder 10 is as follows:
Insert the fulcrum shaft 13 from the screw hole 24 side, hold the non-threaded part 22 in the screw hole 24 and the hole part 25 as shown in FIG. (Figure 3b).
As a result, the fulcrum shaft 13 is screwed to the holder 10 and is fixed to the holder 10 without wobbling. Therefore, due to the vibration of the vibrating body, the fulcrum shaft 13
does not move and make abnormal noises. Note that the distance X between the surfaces 26 and 27 described above is made larger than the length Y of the non-threaded portion 22 and smaller than the sum of the length Y of the non-threaded portion 22 and the length D of the threaded portion 21. The fulcrum shaft 13 can also be attached to the holder 10. However, in this case, when the threaded part 21 is locked in the threaded hole 24 (the state shown in FIG. 3a), the tip of the non-threaded part 22 is not inserted into the hole 25, and the threaded part 21 is screwed into the screw hole 24, the tip of the non-threaded portion 22 is inserted into the hole portion 25 for the first time. Therefore, due to parts errors or other causes, when the threaded part 21 is screwed in, the non-threaded part 2
2 may not be inserted into the hole 25 (therefore, the non-threaded portion 22 will come into contact with the surface 27). In this case, if the threaded part 21 is further screwed in, the tip of the non-threaded part 22 will press the holding member 17 with a strong force, and the holder 10 itself will be destroyed. In contrast, in this embodiment, as shown in FIG. 3a, the non-threaded part 22 can be inserted into the hole 25 before screwing in the threaded part 21, and the above problem can be completely avoided. can do. Further, a taper 30 is formed at the tip of the non-threaded portion 22, making it easier to insert the non-threaded portion 22 into the hole 25. In addition, 3
1 is a spring washer for ensuring that the fulcrum shaft 13 is screwed securely.

[Effects of the invention] As mentioned above, according to the fulcrum shaft mounting structure of the present invention, abnormal noise is not generated at the fulcrum shaft due to vibration, and it is suitable for use in equipment that is attached to vibrating bodies such as automobiles. If so, the problem of abnormal noise caused by vibration will be solved. Furthermore, the efficiency of the work of attaching the fulcrum shaft is significantly improved compared to conventional structures.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams explaining the mounting structure of the fulcrum shaft of the present invention. Figure 1 is an exploded perspective view showing the holder, the fulcrum shaft attached to the holder, and the release lever, and Figure 2 is the same as above. FIG. 3 is a partial sectional view showing a method for attaching a fulcrum shaft to a holder; FIG. 4 is a partial sectional view showing a conventional fulcrum shaft mounting structure. 13... Fulcrum shaft, 16... First holding member, 1
7... Second holding member, 20... Screw head, 21...
...Threaded part, 22... Non-threaded part, 24... Threaded hole,
25... Hole portion, 26... Surface of first holding member, 2
7... Surface of the second holding member.

Claims (1)

[Scope of utility model registration request] a fulcrum shaft in which a threaded part having a screw head is formed on one end side and a shaft diameter of a non-threaded part connected to the threaded part is smaller than an inner diameter of a screw hole into which the threaded part is screwed;
a first holding member formed with a screw hole that engages with the threaded portion; and a first holding member provided at a distance from the first holding member, and provided in the screw hole on a surface facing the first holding member. A hole portion into which the non-threaded portion fits is formed at an opposing position, and the first hole portion locks the screw head when the fulcrum shaft is inserted from the surface and the screw hole side toward the hole portion. and a second holding member positioned at a distance smaller than the length of the non-threaded portion from the surface of the holding member.