JP2511337Y2 - Counter spindle mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a support shaft mounting structure for a counter that sequentially shifts a plurality of display wheels from a lower digit to an upper digit to display, for example, a walking distance of a vehicle. .

[Prior Art] Generally, for example, an inner pinion type counter used in a vehicle totalizer or the like has a spindle 2 horizontally provided between opposing side walls 1A and 1B of a frame body 1 as shown in FIG. A plurality of display wheels 3 are rotatably supported on the support shaft 2, and each display wheel 3 is supported.
A pinion (not shown) interposed between and supported by a holder is relayed, and the display wheel 3 is sequentially rotated from the lower digit to the upper digit to rotate and display the walking distance.
Further, the side walls 1A and 1B are provided with a pair of notch grooves 4 which are opened at the end edges for supporting the support shaft 2, and both end portions of the support shaft 2 are inserted into the notch grooves 4 to form notch grooves. The support shaft 2 is fixed to the frame body 1 by swaging the peripheral edge portion of the opening 4. Further, in this case, in order to attach the respective display wheels 3 which are inserted through the support shaft 2 to predetermined positions, the support shaft 2 is provided with, for example, the one side wall 1A.
A pair of recessed grooves 5 are provided with an interval corresponding to the plate thickness, and a clip ring 6 is fitted into the recessed grooves 5 and the side wall 1A is held by each clip ring 6 to restrict the thrust movement of the spindle 2. I am trying to do it.

[Problems to be Solved by the Invention] In the above-mentioned conventional example, since the clip ring 6 prepared separately for restricting the thrust movement of the support shaft 2 is used, not only the number of parts increases but also the groove 5 is clipped. It takes a lot of trouble to fit the ring 6,
There is a problem in workability, and the support shaft 2 easily slips out from the notch groove 4 until the support shaft 2 is fixed by crimping, and there is a surface lacking in stability when assembling automatically.

Therefore, an object of the present invention is to provide a counter spindle mounting structure capable of reducing the number of parts, preventing the thrust movement of the spindle, and suppressing the fall of the spindle to facilitate the assembly work. .

[Means for Solving the Problem] A counter spindle mounting structure in which a plurality of display wheels are rotatably supported on a spindle, and both ends of the spindle are laterally provided on opposing side walls of a frame body. In the above, the frame body is made of synthetic resin, and a pair of notch grooves that open at the end edges of the opposing side walls of the frame body are provided, and a projection is formed on the inner surface of at least one of the notch grooves. A groove is formed at the end of the shaft so as to be inserted into and engaged with the protrusion, and an elastic arm is provided at the opening edge of the notch so as to elastically press the upper portion of the support shaft to prevent the arm from coming out of the notch. Further, both edges of the open end of the cutout groove are formed as heat-welded portions.

[Operation] According to the present invention, when the groove formed in the support shaft is inserted into the protrusion of the notch groove, the thrust movement of the support shaft is restricted by the engagement between the groove and the protrusion, and the notch is formed. The support shaft inserted in the groove is elastically pressed by the elastic arm and temporarily held in the cutout groove so that the support shaft does not come off from the cutout groove.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention, and 11 is a frame body made of synthetic resin in which an integrating meter unit and a speedometer unit are incorporated, and a substantially rectangular base portion of the frame body 11. An inner pinion type total counter 13 and an outer pinion type trip counter 14 which are main components of the totalizer and a trip counter 14 of an outer pinion type are arranged in parallel on the upper part of the side wall 12, and side walls to which both counters 13 and 14 are attached and fixed. 11A and 11B are provided on both sides so as to face each other,
Both ends of the support shafts 13A, 14A of the counters 13, 14 are inserted from above into a notch groove 11C opened at the upper ends of the side walls 11A, 11B, and are fixed by caulking or the like.

Further, a frame-shaped connecting portion 15 is provided at the center of the base portion 12 so as to be located between the counters 13 and 14, and the connecting portion 15 is provided.
In the lower part of the counter 13, a curved shape is formed so as to substantially follow the outer peripheral surfaces of both counters 13 and 14, and the lower end peripheral edge is connected to the base portion 12, and a dial 16 is attached to the upper surface of the connecting portion 15 by a screw 17. Installed and fixed.

Reference numeral 18 is a speedometer using a crossed coil type movable magnet type instrument serving as the speedometer unit. The speedometer 18 is a bobbin main body 19 made of synthetic resin and divided into two parts.
A movable magnet 20 provided inside the movable magnet 20, a pointer shaft 21 press-fitted and fixed to the movable magnet 20, and a coil 22 wound around the outer peripheral portion of the bobbin main body 19, and the bobbin main body 19 is a metal magnetic shield cover from the front side 23
And the leg 19A is attached to the lower end of the bobbin main body 19 outward from the rear opening of the magnetic shield cover 23.
Is formed to project. Then, the speedometer 18 is disposed on the rear surface side of the frame body 11 and the pointer shaft 21 is inserted into the hole 24 provided in the connecting portion 15, and the mounting leg of the bobbin main body 19 is attached.
Attach 19A to the rear surface of the base 12 with screws 25,
The speedometer 18 is assembled and fixed to the frame body 11. Further, the pointer 26 is press-fitted into the tip of the pointer shaft 21, and the pointer 26
The measured amount is indicated and displayed by comparison with a display unit (not shown) such as a scale or a number provided on the dial 16.

A gear box 27, which is located in the central portion of the counters 13 and 14 and houses a step motor (not shown), is attached and fixed to one side of the frame body 11 by a screw 28. 29 rotations are formed to be transmitted to the counters 13 and 14, respectively.

A circuit board 30 is disposed on the rear surface of the frame body 11, and a screw 33 is screwed into a mounting leg portion 32 projecting on the rear surface of the frame body 11 through a through hole 31 formed in the circuit board 30. The frame body 11 and the circuit board 30 are fixed by attaching the frame body 11 to the connector 34 mounted on the circuit board 30.
And the terminal pins 35 of the gearbox 27 are inserted and connected, and the gearbox 27 of the speedometer 18 and the circuit board 30 are electrically connected.

Further, each of the counters 13 and 14 supports a plurality of display wheels 36 on their support shafts 13A and 14A so as to be free to rotate, and in the inner pinion type total counter 13, the inside of the inner peripheral surface of the display wheel 36 is A pinion (not shown) for shifting the gear is interposed between the display wheels 36 and a holder 37 for supporting the pinion is interposed between the display wheels 36. On the other hand, in the outer pinion type total counter 14, the spindle 39A of the zeroing member 39 is provided between the side walls 11A and 11B of the frame 11 in parallel with the spindle 14A of each display wheel 36.
Is horizontally installed, and a pinion 38 for shifting is axially supported on the support shaft 39A, which is located outside between the display wheels 36.

When the rotation from the gear box 27 is transmitted to the least significant digit display wheel 36 of each counter 13, 14 through the gear 29, each pinion sequentially moves from the least significant digit display wheel 36 to the most significant digit display wheel 36. It is configured so as to rotate by a digit via 38.

Further, a small-diameter groove 40 is formed at one end of each of the support shafts 13A, 14A of the counters 13, 14, and a projection 41 is opposed to the inner surface of the cutout groove 11C corresponding to the groove 40. And a pair of left and right elastic arms 42 formed in a cylindrical shape on the outer opening edge of the cutout groove 11C.
It is projected integrally from. The elastic arm 42 is formed such that the inner end side thereof enters the inside of the cutout groove 11C.
Then, by inserting the support shafts 13A and 14A into the cutout grooves 11C so that the recessed grooves 40 of the support shafts 13A and 14A fit into the protrusions 41 of the cutout grooves 11C during assembly, The thrust movement of each of the support shafts 13A and 14A is restricted by the engagement between the support shaft 13A and the protrusion 41, the display wheel 36 of each of the counters 13 and 14 can be attached at a predetermined position, and each support shaft 13A into the notch groove 11C is also attached. , 14A
By the insertion of, the upper ends of both ends of the support shafts 13A, 14A protruding outward from the side walls 11A, 11B of the frame body 11 are elastically restrained by the elastic arms 42 and temporarily held, and the support shafts 13A, 14A It is prevented from coming off, so that each spindle 13 from the notch groove 11C
It is possible to prevent the A and 14A from falling off.

Further, by forming both ends of the notch groove 11C on the opening side as the heat-welded portions 43 of the support shafts 13A, 14A, the support shafts 13A, 14A in the temporarily fixed state described above are formed by the heat-welded portion 43 of the frame body 11. It can be securely fixed.

As described above, in the present invention, the thrust movement of each support shaft 13A, 14A is regulated by the engagement of the projection 41 provided in the notch groove 11C and the concave groove 40 provided in each support shaft 13A, 14A. The number of parts can be reduced without the need for a separate part such as a clip ring as in the example, and the support shafts 13A and 14A can be inserted into the notch groove 11C by combining the protrusion 41 and the concave groove 40. The thrust movement of the support shafts 13A and 14A can be restricted by such a simple work, and the assembling work can be easily performed, and the elastic arms 42 projecting from the side walls 11A and 11B of the frame body 11 temporarily hold and hold them. As a result, the support shafts 13A and 14A are retained and retained, and there is no risk that the support shafts 13A and 14A will fall out during the assembly work until the caulking and fixing by the heat-welding portion 43, and the assembly work is stable. In addition, automatic instrument assembly can be performed easily.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above embodiment, a pair of left and right elastic arms are provided on the outer surface side of the frame body. However, if there is enough space, the elastic arm 42 may be provided on the inner surface side of the frame body 11 as shown in FIG. Further, the elastic arms do not necessarily have to be provided in a pair on the left and right, and the elastic shaft may be elastically suppressed by one elastic arm to hold and hold the support shaft. Further, the shape is not limited to the cylindrical shape, and the shape shown in FIG. As shown, each support shaft 13A is formed by a prismatic elastic arm 44 having a curved surface 44A along the outer peripheral surface of each support shaft 13A, 14A on the lower surface side of the heat-welded portion 43A provided at the opening side end of the notch groove 11C. , 14A may be retained and retained, and the shape, number, forming position, etc. may be appropriately selected.

In addition, the type of instrument unit to be attached to the frame body,
For the structure etc., various types of instruments may be selected appropriately, and it is not always necessary to incorporate instruments into the frame body.
Only the counter may be assembled to the frame body.

[Advantage of the Invention] The present invention provides a counter spindle mounting structure in which a plurality of display wheels are rotatably supported on a spindle, and both ends of the spindle are laterally provided on opposite side walls of a frame body. The frame body is made of synthetic resin, and a pair of cutout grooves are provided at the end edges of the side walls of the frame body that face each other, and a projection is formed on the inner surface of at least one cutout groove. A concave groove that is inserted into and engaged with the protrusion is formed at an end of the elastic groove, and an elastic arm that elastically presses the upper part of the support shaft to restrict the slip-out from the groove is provided at the opening edge of the groove. Moreover, since both edges of the opening end of the cutout groove are configured as heat-welded portions, the number of parts is reduced, and
It is possible to provide a counter shaft support mounting structure that prevents the support shaft from sliding and prevents the support shaft from falling off and facilitates assembly work.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is an exploded perspective view showing a part of the invention, FIG. 2 is a front view of an essential part, and FIG. 3 is a plan view of the essential part. FIG. 4 is an overall sectional view, FIGS. 5 and 6 show another embodiment of the present invention, FIG. 5 is a plan view of an essential part, FIG. 6 is a front view of the essential part, and FIG. [Fig. 4] is an exploded perspective view showing a conventional example. 11 …… Frame body, 11A, 11B …… Side wall 11C …… Notch groove, 13,14 …… Counter 13A, 14A …… Spindle, 36 …… Display wheel 40 …… Recessed groove, 41 …… Protrusion 42,44 ...... Elastic arm, 43,43A ...... Heat weld

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 56-29417 (JP, U) Real public Hei 2-22743 (JP, Y2) Real public Sho 60-27927 (JP, Y2) Real public Sho 57- 27091 (JP, Y2) Actual public Sho-57-27077 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of display wheels are rotatably supported on a support shaft,
In a counter spindle mounting structure in which both ends of the spindle are laterally provided on opposite side walls of the frame body, the frame body is made of synthetic resin, and the edges of the opposite side walls of the frame body are respectively formed. A pair of notched grooves that open are provided, a protrusion is formed on the inner surface of at least one of the notched grooves, and a groove is formed at the end of the support shaft so as to be inserted into and engaged with the protrusion. An elastic arm for elastically pressing the upper portion of the support shaft to regulate the slip-out from the notch groove is provided at the opening edge of the counter, and both edges of the opening end of the notch groove are configured as heat-welded portions. Support shaft mounting structure.