JPH0725623Y2 - Plate positioning device for instruments - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a plate positioning device for instruments,
More specifically, the present invention relates to a positioning device for mounting a sub plate on which components are mounted on a main plate in an instrument.

[Conventional technology]

Conventionally, when a sub-plate on which parts and the like are mounted is attached to a main plate provided in a measuring instrument, its accurate positioning is performed as follows, for example. That is, as shown in FIG. 5, the bottom portion 42 of the shaft 41 provided on the sub-plate 40 is configured to project to the back surface of the sub-plate 40, and the bottom portion 42 of the shaft 41 is fitted to the main plate 44. A hole of the same diameter is provided. Further, a caulking portion 43 is provided near the bottom portion 42 of the shaft 41, and the shaft 41 is caulked to the sub plate 40 to
41 is fixed to the sub plate 40. Further, the main plate 44 is provided with a concave step portion 45 at a position facing the caulking portion 43 so as not to hinder the attachment of the sub plate 40 in close contact. Then, the bottom portion 42 of the shaft is fitted into the hole provided in the main plate 44, and the sub plate
Positioning is performed when the 40 is attached to the main plate 44.

[Problems to be solved by the device]

However, since the plate positioning device as described above requires the caulking portion 43, the step portion 45 is formed on the main plate 44.
Must be provided, and the length of the hole into which the bottom portion 42 of the shaft 41 fits becomes short due to the limitation of the thickness of the main plate 44. For this reason, the contact area between the bottom portion 42 of the shaft 41 and the hole is reduced, the positioning of the sub plate 41 with respect to the attachment to the main plate 44 may be inaccurate, and the verticality of the shaft 41 may be impaired. In addition, a step on the main plate 44
The processing of 45 complicates the manufacturing process of the main plate 44 and leads to an increase in cost.

Then, this invention aims at provision of the positioning device of the plate in instruments which solved the said subject.

[Means for Solving the Problems]

Referring to FIGS. 3 and 4, the present invention shows a shaft 23 arranged and fixed on the sub plate 21 when the sub plate 21 is positioned and attached to the main plate 4 provided in the instrument. A plate positioning device in an instrument in which a bottom portion 23c of the sub-plate 21 is projected to the rear surface of the sub-plate 21 and the bottom portion 23c and a hole provided in the main plate 4 are fitted to determine a mounting position of the sub-plate 21. In, the bottom portion 23 of the shaft 23 protruding to the back surface of the sub plate 21
The bush 27 is fitted and fixed to c, and the main plate is provided with a hole corresponding to the diameter of the bush 27.
27 is fitted in the hole to determine the mounting position of the sub-plate 21.

[Action]

Based on the above configuration, when mounting the sub plate to the main plate, the positioning is performed by fitting the bush fitted and fixed to the bottom of the shaft protruding on the back surface of the sub plate into the hole provided in the main plate. Let me do it. In this case, since the diameter of the bottom of the shaft to be fitted is increased by the amount of the bush, the contact area with the hole provided in the main plate is increased, the positioning of the sub-plate is accurate, and the verticality of the shaft is also accurate. .

〔Example〕

FIG. 4 is a perspective view of an operation recorder in which the plate positioning device according to the present invention is implemented, and details thereof are omitted. A cover 2 is attached to the case 1 by a hinge 3 so as to be openable and closable, and has a fixing portion 1a therein. A main plate 4 is fixed to the fixing portion 1a with screws or the like, and main components such as an integrating meter and an operation meter are mounted on the plate 4. For example, two guide arms 5 and 6 are provided on the main plate 4, and one guide arm 6
A guide plate 8 on which a recording needle 7 is attached is slidably attached to. The tip 8a of the guide plate 8 is engaged with a heart cam 9, and the heart cam 9 is connected to a vehicle transmission by a drive gear 10.

Further, 11 is a pinion connected to a speedometer (not shown) provided on the front side of the cover 2 and includes a main plate 4
It is rotationally driven via a drive shaft by a speed detection drive unit 12 provided below. Further, the drive shaft 13 is connected to the transmission of the vehicle and also drives the drive gear portion 10 described above.

Further, reference numeral 20 is an electromagnetic recording device for recording ON / OFF of the engine, etc., and is assembled on the sub-plate 21 as shown in detail in FIG. The sub plate 21
As shown in FIG. 2, holes 21a to 21e are formed in the sub-plate 21, and the holes 21a and 21b connect the sub-plate 21 to the main plate 4.
The holes 21c, 21d, and 21e are for mounting the solenoid 22.

Further, a shaft 23 is attached to the sub-plate 21, and a section of the portion taken along the line III-III has a bottom portion 23c of the shaft 23 protruding through the sub-plate 21 as shown in FIG. A bush 27 is fitted in the bottom portion 23c, and the end of the bottom portion 23c is caulked so that the bush 27 does not fall out. Further, the tip portion 23b of the shaft 23 has a smaller diameter than the central portion, and the tip portion 23b is further provided with a groove 23d in its outer peripheral portion.

Then, as shown in FIG.
The solenoid 22 is attached. The solenoid 22 is attached at a mounting position by aligning a protrusion (not shown) provided on the frame of the solenoid with the holes 21c and 21e of the sub plate 21 and further inserting a screw 29 through the hole 21d. This is done by stopping the frame from below (see FIG. 1 (c)).

Further, a movable plate 26 having a U-shaped cross section is inserted into the shaft 23 from above, the diameter of the lower hole of the movable 26 is larger than the diameter of the shaft 23, and the diameter of the upper hole is larger than that of the shaft 23. Axis smaller than diameter
The diameter is larger than the diameter of the tip portion 23b of 23. Therefore,
The upper portion of the movable plate 26 is supported at a step between the tip portion 23d of the shaft 23 and the central portion, and the movable plate 26 is prevented from coming off by fitting the sleeve 28 into the groove 23d provided in the shaft 23. Has been done.

Further, one end of the movable plate 26 is located at the tip of the solenoid 22, and the movable plate 26 is attracted or separated from the solenoid 22 when the current to the solenoid 22 is turned on and off. The movable plate 26 is biased by a spring (not shown) so as to separate from the tip of the solenoid 22. A recording needle support arm 24 is screwed to the other end of the movable plate 26, and a recording needle 25 is attached to the tip of the arm. When the solenoid 22 is turned on and off, the movable plate 26 is rotated about the shaft 23, and the recording needle supporting arm 24 is also rotated based on this, so that the position of the recording needle 25 is moved and is not shown. The on / off state of the solenoid is recorded on the recording paper.

1 (b) is a side view of FIG. 1 (a), and FIG. 1 (c) is an end view of line cc of FIG. 1 (a).

On the other hand, the main plate 4 has a shaft 23 of the sub plate 21.
It is provided in a hole having a diameter that matches the diameter of the bush 27 attached to the bottom portion 23c. When the electromagnetic recording device 20 mounted on the sub plate 21 is attached to the main plate 4,
First, the bush 27 shown in FIG. 3 is fitted into the hole of the main plate. Furthermore, the sub-plate 21 shown in FIG.
The sub-plate 21 is screwed to the main plate 4 using the holes 21a and 21b of the sub-plate 21 to accurately position the sub-plate 21.

As described above, when the sub-plate 21 is attached to the main plate 4, the outer peripheral portion of the push 27 is used for the positioning, so that the contact area with the hole provided in the main plate 4 becomes large and the positioning becomes accurate. At the same time, the verticality of the shaft 41 can be secured. Further, since it is not necessary to crimp the shaft 23 on the surface of the sub plate 21, it is not necessary to punch a concave step portion for the crimp portion, and it is possible to reduce the cost by reducing the manufacturing process.

[Effect of device]

As described above, according to the present invention, the bush is fitted and fixed to the bottom portion of the shaft protruding to the back surface of the sub plate, and the bush is fitted into the hole provided in the main plate. Since it is used as a positioning device when the sub plate is mounted on the main plate, the contact area between the bush and the hole provided in the main plate is increased, so that the sub plate can be accurately positioned and the verticality of the shaft can be secured.

[Brief description of drawings]

 FIG. 1 is a diagram showing an electromagnetic recording device, FIG. 2 is a diagram showing a sub-plate using the present invention, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. FIG. 5 is a divided perspective view of the meter, and FIG. 5 shows a positioning device which has been conventionally used. 4 …… Main plate 21 …… Sub plate 23 …… Shaft 23c …… Bottom 27 …… Bush

Claims (1)

[Scope of utility model registration request] 1. When positioning and attaching a sub-plate to a main plate provided in an instrument, a bottom portion of a shaft arranged and fixed on the sub-plate is projected to the back surface of the sub-plate, and the bottom portion and the In a plate positioning device for instruments that fits the holes provided in the main plate to determine the mounting position of the sub plate, fit and fix the bush on the bottom of the shaft protruding to the back surface of the sub plate. A poet positioning device for measuring instruments, further comprising a hole formed in the main plate, the hole being matched with the diameter of the bush, and the bush being fitted in the hole to determine a mounting position of the sub plate.