JPS631246Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bimetallic indicator.

FIG. 1 shows an example of a conventional bimetallic indicator of this type.A shaft 3 is erected on a frame 2 of this bimetallic indicator 1, and a collar 4 is attached to this shaft 3.
A pointer 5 is fitted to the upper end of the collar 4 via a separate cylindrical member 5a, and a link plate 6 is fixed to the lower end of the collar 4. A pin 9 provided at the tip of the bimetal 8 is engaged with a slot 7 provided in the plate 6, and the curvature of the bimetal 8 due to the heat generated by the hot wire 10 wound around the bimetal 8 is directed to the pointer 5 via the pin 9. The pointer 5 performs an instruction operation by transmitting the command to the user. 11
1 is a dial plate, 12 is a housing case for the bimetal indicator 1, and 13 is an insertion hole for a pointer shaft provided in the dial plate 11.

By the way, the dial 11 of such a bimetal indicator 1 is provided with a small insertion hole 13 in order to reduce restrictions on its design, and a separate pointer is inserted into the collar 4 through this insertion hole 13. 5 is fitted.

However, in such a device, when fitting the pointer 5 to the collar 4, the direction of the pointer 5 with respect to the direction of the slot 7 is set in a predetermined direction (in the drawing, the direction of the pointer 5 is set in advance), as shown in FIG. 5 may deviate from the position (parallel to the slot 7), and if such a deviation occurs, the movement trajectory of the pointer 5 will not correspond to the movement trajectory of the pin 9 with predetermined indicating characteristics. For this reason, conventionally, a jig is used to fit the pointer 5 into the collar 4 so that the direction of the pointer 5 matches the direction of the slot 7, for example.
This has the disadvantage that the efficiency of the work of fitting the pointer 5 is reduced.

The object of the present invention is to provide a bimetallic indicator which can eliminate the drawbacks of the conventional ones as described above.

The present invention will be explained below based on the embodiments shown in FIGS. 3 to 7.

3 to 5, a shaft 23 is supported in an upright state on a frame 22 of a bimetallic indicator 21, and a collar 24 is rotatably inserted and held in this shaft 23. 43 is Wasshya. Reference numeral 25 denotes a pointer fitted into the collar 24, and is integrally molded with the cylindrical portion 32. A link plate 26 is integrally formed with the collar 24, and a slot 27 is formed in the link plate 26. 28 is a bimetal whose one end is fixed to the frame 22 and has a pin 29 protruding from the other end, and a heating wire 30 is wound around this bimetal 28. Also pin 2 above
9 is loosely fitted into the slot 27 of the link plate 26. Reference numeral 31 denotes a dial of the instrument, and the dial 31 has a through hole 33 through which the cylindrical portion 32 of the pointer 25 is inserted. 35
is an engagement protrusion integrally formed at the base of the collar 24, and an engagement recess 36 corresponding to this engagement protrusion 35
is formed at the lower end of the cylindrical portion 32, and the engagement protrusion 35 and engagement recess 36 engage the pointer 2.
5 and the link plate 26 are positioned. Further, a retaining protrusion 37 is formed on the engaging protrusion 35, a retaining recess 38 is formed on the edge of the engaging recess 36, and the retaining protrusion 37 and the retaining recess 38 are engaged with each other. The fitting between the pointer 25 and the collar 24 is maintained by this. Note that 34 indicates a part of the housing case.

In this embodiment, as described above, the cylindrical portion 32 of the pointer 25
has an engaging recess 36 and a link plate 26.
An engaging protrusion 35 is formed on the collar 24 that is integrated with the
When the pointer 25 is fitted into the link plate 26, its engagement recess 36 engages the engagement protrusion 35, thereby causing the link plate 26, that is, the slot 2
The direction of the pointer 25 with respect to the direction of 7 is regulated, accurate positioning is achieved, and the intended purpose is achieved.

In the embodiment shown in FIG. 5, it has been described that the retaining protrusion 37 and the retaining recess 38 are provided, but this retaining means is not necessary, and the cylindrical portion remains fitted in the collar. The above-mentioned retaining means may be omitted if it can be held securely.

As described above, the present invention provides a link plate 26 having a slot 27 into which a pin 29 installed upright at the tip of a bimetal 28 is displaced by heat generated in accordance with a measured value, and a collar 24 which extends in a right angle direction, is fixed to the frame 22, and is rotatably held through a pointer shaft 23 whose tip is swaged;
an engaging protrusion 3 that connects the outer peripheral surface of the base of the collar 24 with the link plate 26 and extends in the axial direction of the collar 24;
The cylindrical portion 32 of the pointer 25 is integrally formed of a resin material and has an engaging recess 36 at its end, and is fitted onto the outer periphery of the collar 24 so as to wrap around the end of the pointer shaft 23. The cylindrical portion 32 is attached to the collar 24.
When the needle is fitted into the link plate, the engagement recess 36 engages with the engagement protrusion 35 to restrict the direction of the pointer 25 with respect to the direction of the slot 27. When the pointer is fitted into the link plate, the direction of the pointer relative to the direction of the slot of the link plate is extremely easily and accurately regulated, and furthermore, the indexing characteristics of the pointer can be easily adjusted. In addition, fitting the cylindrical portion of the pointer to the collar is extremely easy, and the positioning of both is done at the same time as the fitting, resulting in improved assembly work efficiency and improved work efficiency.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional bimetal indicator.
Fig. 2 is a plan view of the main parts of the above, Fig. 3 is a sectional view showing an embodiment of the bimetal indicator according to the present invention, Fig. 4 is a perspective view of the same, and Fig. 5 is a main part of the same. FIG. 21... Bimetal indicator, 22... Frame, 23... Pointer shaft, 24... Color, 25...
Pointer, 26... Link plate, 27... Slot, 28... Bimetal, 29... Pin, 30...
... Heating wire, 31 ... Dial plate, 32 ... Cylindrical part, 3
3...Through hole, 34...Accommodation case, 35...Engagement protrusion, 36...Engagement recess, 37...Retaining protrusion, 38...Receiving recess, 43...Washer.

Claims (1)

[Scope of utility model registration request] a link plate 26 having a slot 27 into which a pin 29 installed upright at the tip of a bimetal 28 is displaced by heat generated in accordance with a measured value;
extending perpendicularly to the link plate 26;
A collar 24 is fixed to the frame 22 and is rotatably held by passing through a pointer shaft 23 whose tip is swaged, and connects the outer peripheral surface of the base of the collar 24 to the link plate 26 and connects the collar 24 in the axial direction. The pointer 2 is integrally formed of a resin material with an engaging protrusion 35 extending therein, and an engaging recess 36 is provided at the end.
The cylindrical portion 32 of No. 5 is fitted onto the outer periphery of the collar 24 so as to wrap around the end of the pointer shaft 23, and when the cylindrical portion 32 is fitted onto the collar 24, the engaging protrusion 35 engages with the engaging protrusion 35. A bimetallic indicator in which a concave portion 36 engages to restrict the direction of the pointer 25 with respect to the direction of the slot 27.