JPH0129647Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a shaft holding structure for a counter.

[Conventional technology]

In general, the shaft holding structure of this type of counter is such that, for example, a hole large enough to allow the shaft to be inserted is formed in one side wall of the opposite side wall of the counter frame, and a hole larger in diameter than the shaft is formed in the other side wall. First insert the shaft holding the counter through the large diameter hole, insert the other shaft side into a hole with approximately the same diameter as the shaft, fit the substantially cylindrical bush inserted into the shaft into the large diameter hole, A snap spring, wedge, etc. is fitted onto the shaft located on the side edge of the bush to prevent the bush from slipping out through the large diameter hole provided in the frame, and another snap spring, wedge, etc. is used to secure the shaft. In addition to regulating the position in the slicing direction, the shaft is supported and held on the counter frame.

[Problem that the invention attempts to solve]

However, in this case, the parts to be assembled are small and the assembly work may require time and effort.

In this regard, as disclosed in Japanese Utility Model Publication No. 57-25324, the applicant of the present application has provided a bearing groove-shaped hole with one end open on at least one side of the frame, and a shaft made of synthetic resin is inserted into the groove-shaped hole. The shaft is mounted on the frame by bayonet-coupling the shaft support plates. This makes it possible to eliminate the conventional snap springs and wedges located on the bushing side, which has the effect of reducing the number of parts to be assembled.

However, since a snap spring or a wedge is required on the other side wall of the frame to regulate the thrust direction of the shaft, the assembling process remains troublesome.

Furthermore, as disclosed in Japanese Utility Model Publication No. 44-12419, for example, small assembly parts such as the above-mentioned snap springs and wedges are eliminated, and grooves are formed on both side walls of the counter frame.
Both ends of the shaft are fitted into this groove and the shaft is attached and fixed by bending and caulking. Incidentally, in this case, although the shaft can be easily assembled, it is difficult to remove it when replacing parts, for example, and the replacement work cannot be easily performed.

In addition, examples that take this point into consideration include, for example, Utility Model Publication No. 51-3721 or Utility Model Publication No. 53-48586.
As disclosed in the above publication, a groove is formed in the counter frame, the end of the shaft is locked in this groove, and then the groove is closed from the opening side using a stopper formed in a substantially U-shape. The shaft is fitted and held at the end of the side wall of the frame, and this stopper prevents the shaft from coming off. In this case, since the shaft is supported and held between the groove and the stopper, there is a risk that the shaft may float due to variations in dimensional accuracy due to the positional relationship between the groove and the stopper.

[Means for solving problems]

The purpose of this invention is to support and hold the countershaft in a stable state while facilitating assembly work.The characteristic configuration for achieving this purpose is to provide a recess in at least one of the opposite side walls of the frame. A clip member formed in a substantially U-shape is attached to the side wall of the frame so that a groove is provided and the end side of the shaft, in which the counter is inserted and held, is locked in the groove of the frame, and the opening side of the groove is closed and closed. In the counter shaft holding structure, which is inserted from the end to fix the side wall and the clip member, an elastic piece is formed in a part of the clip member, and this elastic piece is installed on the side wall of the frame. The purpose is to apply a resilient force to the peripheral surface of the shaft in the depth direction from the opening side of the frame.

〔Example〕

Next, an embodiment based on the above characteristics will be described with reference to the accompanying drawings.

FIGS. 1 to 5 show an embodiment of this invention, which will be explained here by taking as an example a mileage accumulating counter provided in a vehicle speedometer.

In the figure, reference numeral 1 denotes a frame in which a speedometer body (not shown) is housed, and in this case, the frame 1 is commonly used as a frame for assembling the speedometer body and a mileage accumulating counter.

In the opposing side walls 2 and 3 of the frame 1, a shaft hole 4 is formed in one side wall 2, and a groove 5 is formed in the other side wall 3.

In addition, a character wheel 7 serving as a plurality of counters is inserted into a counter shaft 6 installed on the opposing side walls 2 and 3 of the frame 1, and a character gear 8 that transmits rotational drive from a speedometer mechanism (not shown) is inserted. This character gear 8 and the least significant digit of the character 7 are connected and arranged. Further, a pinion holder 9 is interposed between each of the character wheels 7, and the end portion of the pinion holder 9 is held by a plate 10 attached to the opposite side walls 2 and 3 of the frame 1 so as not to rotate.

Further, the side wall 3 in which the groove 5 is formed has an engaging portion 11 integrally formed on the outer surface and the inner surface thereof, and a guide wall facing in the depth direction at a location somewhat apart from the groove 5. 12 are provided protrudingly.

In this embodiment, the clip member 13 that holds the shaft 6 on the side wall 3 is made of a metal such as a stainless steel plate, a phosphor bronze plate, or a carbon tool steel plate.
An arm piece 15 with both sides bent in substantially perpendicular directions.
is formed, and a base 1 is formed in the middle of each arm piece 115.
A long groove 16 is formed toward the fourth side, and
A hook-shaped engaging pawl 17 is formed on the distal end side of the arm piece 15.

Further, one side of the base portion 14 of the clip member 13 has a base portion 14 along the width direction of the clip member 13.
A continuous elastic piece 18 is formed.

Further, an annular groove 19 that is slightly wider than the wall thickness of the side wall 3 is formed in the shaft 6, and the movement of the shaft 6 in the axial direction is restricted by utilizing the step of the shaft 6 caused by this groove 19. That's what I do. Although not shown in the drawings, means for restricting the movement of the shaft 6 in the axial direction may include forming an annular protrusion on the circumferential surface of the shaft 6, reducing the diameter of the shaft at both ends of the shaft 6, or forming a shaft at two locations. An annular groove may be formed to hold the stepped portion of the shaft 6 in contact with the side walls 2, 3 of the frame 1 or the clip member 13, and to restrict its movement in the axial direction.

The assembly of the above configuration will be explained.
First, the shaft hole 4 formed in the side wall 2 of the frame 1 is connected to one end of the shaft 6 on which the character wheel 7 etc. are assembled.
the end of the other shaft 6 into the side wall 3.
It is locked in the concave groove 5 of. At this time, an annular groove 19 formed in the shaft 6 is disposed along the concave groove 5 of the side wall 3 so as to restrict movement of the shaft 6 in the axial direction.

Next, the clip member 13 is attached to the side wall 3 of the frame 1.

At this time, the long groove 16 of the clip member 13 is aligned with the shaft 6, and the engaging claw 17 formed on the arm piece 15
The clip member 13 is pressed until it fits into the engaging portion 11 formed on the side wall 3 of the frame 1, the engaging claw 17 is fitted into the engaging portion 11, and the clip member 13 is attached to the side wall 3 of the frame 1.
to be fixed.

At the same time as this clip member 13 is fitted and fixed, an elastic piece 1 is formed on the base 14 side of the clip member 13.
8 elastically biases the circumference of the shaft 6 as shown in FIG. That is, rattling of the shaft 6 can be prevented.

That is, this can be done by a simple one-touch operation of press-fitting the clip member 13 to the side wall 3 of the frame 1, and the shaft can also be fitted with a shaft in which the elastic piece 18 formed on the clip member 13 is locked in the groove 5 of the side wall 3. By pressing against the circumferential surface of 6,
The shaft 6 can be placed in a proper state and installed on the frame 1 side.

Further, when the clip member 13 is press-fitted to the side wall 3 of the frame 1, the guide wall 12 formed on the side wall 3 of the frame 1 allows the clip member 13 to be fed along. In this case, although the guide walls 12 are provided at four locations on the side wall 3 of the frame 1 in this embodiment, it is not necessarily necessary to provide the guide walls 12 on the side wall 3 depending on the shape, depth, positional relationship, etc. of the groove 5.

6 and 7 show a second embodiment of this invention, in which an elastic piece 18A formed on the clip member 13 is connected at one end to the base 14 along the length direction of the clip member 13. The guide wall 12A of the side wall 3 is connected to the engaging portion 1.
It extends further in the depth direction from 1.

Therefore, the clip member 13 is guided and fed along the guide wall 12A until the engaging pawl 17 of the clip member 13 fits into the engaging portion 11 formed on the side wall 3 of the frame 1, and the engaging portion 11 and the engaging pawl are inserted. 17, the elastic piece 18A elastically urges the circumferential surface of the shaft 6 as shown in FIG.
The pressure contact force prevents the shaft 6 from lifting up.

8 and 9 show a third embodiment of this invention, in which an elastic piece 18B formed on the clip member 13 is moved from the side of the base 14 corresponding to the long groove 16 of the clip member 13 almost laterally. In this case, the elastic piece 1
The protrusion direction of 8B is formed to extend along the longitudinal direction of the shaft 6.

Therefore, when the engaging claw 17 of the clip member 13 is fitted into the engaging portion 11 formed on the side wall 3 of the frame 1, the elastic piece 18B protrudes in the longitudinal direction of the shaft 6 as shown in FIG. elastically presses the circumferential surface of the shaft 6, and the shaft 6 is supported and held in pressure contact with the groove 5 formed in the side wall 3 of the frame 1, thereby preventing the shaft 6 from lifting up.

10 and 11 show a fourth embodiment of this invention, in which both ends of the clip member 13 are bent in substantially orthogonal directions to form an arm piece.
At the same time, a long groove 16 is formed in the middle of each arm piece 15 toward the base 14 side, and one arm piece 15 has a hook-shaped engagement claw 1 on its tip side.
7 is formed, and the other arm piece 15 is formed with a crimp piece 15A whose tip side is bent into a dogleg shape.

Also, a clip member 13 is attached to the one arm piece 15 side.
An elastic piece 18C is formed to protrude substantially laterally from the base 14 side of the shaft 6, and in this case, the elastic piece 18C is formed to extend along the longitudinal direction of the shaft 6.

Further, in correspondence with the elastic piece 18C of the clip member 13, an engaging portion 11 is integrally formed on one side of the side wall 3 of the frame 1.

Therefore, when attaching the clip member 13 to the side wall 3 of the frame 1, first attach the clip member 13 to the side wall 3 of the frame 1.
The long groove 16 is aligned with the shaft 6 and the arm piece 15 is aligned with both wall surfaces of the side wall 3.
The clip member 13 is pressed until the engaging claw 17 formed on the side wall 3 fits into the engaging portion 11 formed on the side wall 3, and the engaging claw 17 is fitted and held in the engaging portion 11 to attach the clip member 13 to the side wall 3 of the frame 1. Fix it. During this assembly or fixation, the crimp piece 15A formed on the other arm piece 15 presses toward the wall surface of the side wall 3, and especially when the clip member 13 is fixed, the crimp piece 15A is pressed against the wall surface of the side wall 3.
Due to the pressing action of 5A, the clip member 13 and the side wall 3 of the frame 1 are tightly fitted, and the attachment thereof can be improved.

Further, as shown in FIG. 11, the elastic piece 18C protruding in the longitudinal direction of the shaft 6 elastically presses the circumferential surface of the shaft 6, so that the shaft 6 enters the groove 5 formed in the side wall 3 of the frame 1. The shaft 6 is supported and held in a press-contact state, and can prevent the shaft 6 from lifting up.

In each of the embodiments described above, the clip member 13 is made of a metal material, but the same effects can be obtained even if the clip member 13 is integrally molded from a synthetic resin material. Alternatively, grooves 5 may be formed in both side walls 2 and 3 of the frame 1, and both ends of the shaft 6 may be supported and held by clip members 13 of this type.

Further, in the embodiment, an engaging portion 11 is formed protruding from the side wall 3, and an engaging claw 17 is formed on the clip member 13, and the engaging claw 17 is fitted into the engaging portion 11 to prevent it from coming off. However, it is also possible to form a recessed portion in the side wall 3 and fit the engaging claw 17 of the clip member 13 into this recessed portion to prevent it from coming off.
Further, if each arm piece 15 of the clip member 13 is crimped and clamped to the side wall 3 of the frame 1, and held by this crimping to prevent it from coming off, there is no need to provide an engaging portion on the side wall.

[Effect of idea]

As described above, according to the present invention, a groove is provided in at least one of the opposite side walls of the counter frame, and the end side of the shaft, into which the counter is inserted and held, is locked in the groove of the frame, and the opening of the groove is In the shaft holding structure of the counter, a clip member formed in a substantially U-shape so as to close the side is inserted from the side wall end of the frame to fix the side wall and the clip member. An elastic piece is formed in a part, and this elastic piece is elastically biased toward the depth direction from the opening side of the frame on the circumferential surface of the shaft installed on the side wall of the frame, thereby making assembly easy. It is possible to provide a shaft holding structure for a counter that can prevent rattling of the shaft.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of this invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a side view showing the main parts of Fig. 2, and Fig. 4 is an exploded view of Fig. 3. Perspective view, 5th
The figure is an enlarged sectional view of the main part of Fig. 2, Fig. 6 is an exploded perspective view of the main part showing the second embodiment of this invention, and Fig. 7 is an enlarged sectional view of the main part shown in the assembled state of Fig. 6. ,
Fig. 8 is an exploded perspective view of the main parts showing a third embodiment of this invention, Fig. 9 is an enlarged sectional view of the main parts showing the assembled state of Fig. 8, and Fig. 10 is a fourth embodiment of this invention. FIG. 11 is an enlarged sectional view of the main parts showing the assembled state of FIG. 10. Frame...1, Side wall...2,3, Groove...
5. Shaft...6. Letter wheel...7. Engagement part...
11, Guide wall...12, 12A, Clip member...13, Base...14, Arm piece...15, Crimping piece...15A, Engagement claw...17, Elastic piece...18,
18A, 18B, 18C.

Claims (1)

[Scope of utility model registration request] A groove is provided in at least one of the opposite side walls of the frame, and the end side of the shaft, into which the counter is inserted and held, is locked in the groove of the frame, and the opening side of the groove is closed and closed in a substantially U-shape. In the counter shaft holding structure in which the formed clip member is inserted from the side wall end of the frame to fix the side wall and the clip member, an elastic piece is formed on a part of the clip member, and the elastic piece is A shaft holding structure for a counter, characterized in that a piece is elastically biased toward the circumferential surface of a shaft installed on a side wall of the frame in a depth direction from an opening side of the frame.