JPH0493617A - Measurement instrument device - Google Patents

Abstract

PURPOSE:To prevent a drop in the pointing accuracy of a luminous pointer by making the insertion section of a feed terminal electrically continuous to the external end of a spiral spring only via the caulking of the aforesaid insertion section after the external end of the spiral spring is inserted therein. CONSTITUTION:Terminals 51 and 52 are feed terminals and formed with conductive metal. In addition, the terminals 51 and 52 are fastened to a fixer plate 56 by caulking a pair of projections 51b and 52b formed on flat contact sections 51a and 52a in contact with the surface of the fixer plate 56. Also, the bent walls 51f and 52f, and 51g and 52g at the tip of arm plates 51c and 52c rising from the contact sections 51a and 52a, are used as insertion sections 51i and 52i for inserting the connection sections 41e and 42e of hair springs 41 and 42. The aforesaid insertion sections 51i and 52i are caulked with the connection sections 41e and 42e of the springs 41 and 42 inserted, thereby making the connection sections 41e and 42e electrically continuous to the insertion sections 51i and 52i.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an instrument device equipped with a self-luminous pointer that emits light when electric power is supplied.

[Prior Art] Conventionally, in order to improve the visibility and visual effect of the pointer, there has been a measuring device equipped with a self-luminous pointer having a light emitting element that emits light when energized.

Power is supplied to the light emitting element via a conductive spiral spring (hairspring).

The spiral spring has an inner peripheral end connected to a first power supply terminal fixed to a pointer boss that holds and fixes the self-luminous pointer, and an outer peripheral end connected to a second power supply terminal fixed to a fixing member. ing.

Conductivity between the second power supply terminal and the outer peripheral end of the spiral spring can be achieved by soldering the second power supply terminal and the outer peripheral end of the spiral spring, or by soldering after caulking the caulking part of the second power supply terminal. It was done by doing.

[Problems to be Solved by the Invention] However, when the second power supply terminal and the outer circumferential end of the spiral spring are made electrically conductive by soldering as in the conventional method, the soldering is done in a very small area. There was a possibility that the solder material (flux) would scatter. For this reason,
In a drive device that operates a cross coil that rotates a meter shaft according to the amount of current, if solder material that has been scattered from a soldering point adheres to the cross coil, the windings of the cross coil may become electrically conductive. There was a problem that the battery would get stuck, causing a short circuit. Therefore, since the magnetic force of the crossed coils changes, there is a possibility that the amount of drive of the meter shaft cannot be obtained in accordance with the amount of energization.

Additionally, there was a possibility that the solder material would adhere to the spiral portion of the hairspring, causing the hairspring to become stuck and unable to follow the meter axis. Furthermore, there is a possibility that the meter shaft will not rotate due to adhesion of solder material between the meter shaft and the fixing member.

Therefore, if the second power supply terminal and the outer circumferential end of the spiral spring are made electrically conductive by soldering, there is a problem in that problems occur in the rotating parts and electric parts, and the pointing accuracy of the self-luminous pointer decreases.

SUMMARY OF THE INVENTION An object of the present invention is to provide an instrument device that prevents a decrease in the indicating accuracy of a self-luminous pointer.

[Means for Solving the Problems] (Claim 1) The instrument device of the present invention includes a drive means for rotating a rotation shaft according to an input signal, and a light emitting element that emits light when electric power is supplied. a self-luminous pointer having a self-luminous pointer, a pointer fixing means for fixing the self-luminous pointer to the rotation shaft, a first power supply terminal fixed to the pointer fixing means and supplying power to the light emitting element, and an inner circumferential end portion thereof. A conductive spiral spring connected to the first power supply terminal; and a second power supply terminal connected to an outer peripheral end of the spiral spring to supply power to the spiral spring, the second power supply terminal comprising: It has an insertion part that is caulked when the outer peripheral end of the spiral spring is inserted, and a technical means is adopted in which conduction between the insertion part and the outer peripheral end of the spiral spring is achieved only by caulking the insertion part. .

[Function] (Claim 1) Conductivity between the insertion portion of the second power supply terminal and the outer peripheral end of the spiral spring is established by inserting the outer peripheral end of the spiral spring into the insertion portion of the second power supply terminal and then connecting the insertion portion to the outer peripheral end of the spiral spring. Since this is done only by tightening, no solder material is required. Therefore, the solder material does not adhere to the driving means, rotating parts such as the rotation shaft or spiral spring, or electrical parts such as the spiral spring. Therefore, the rotation shaft is rotated by a predetermined amount of rotation according to the input signal, and the spiral spring reliably follows the rotation axis.

(Claim 2) The locked portion provided radially outward of the spiral spring from the portion inserted into the insertion portion at the outer peripheral end of the spiral spring is a second locked portion.
The movement of the spiral spring in the radial direction is restricted by being locked to the locking portion of the power supply terminal.

Therefore, when the inserted portion of the second power supply terminal is caulked, there is no fear that the electrical connection between the inserted portion and the outer circumferential end of the spiral spring will shift.

[Effects of the invention] (Claim 1) Since the second power supply terminal and the outer peripheral end of the spiral spring can be electrically connected without using soldering, the pointing accuracy of the self-luminous pointer due to scattering of solder material is reduced. It is possible to prevent a decrease in

(Claim 2) Poor conduction between the insertion portion of the second power supply terminal and the outer peripheral end of the spiral spring can be prevented.

[Embodiment] A measuring device of the present invention will be explained based on an embodiment shown in FIGS. 1 to 28.

FIG. 1 is a diagram showing the main parts of the second power supply terminal, and FIG. 2 is a diagram showing an engine revolution meter.

The engine tachometer 1 is an instrument device of the present invention, which includes a drive device 2, a pointer assy 3, an insulator assy 4,
It is equipped with a fixer plate assembly 5 and an instrument panel 6 on which engine speed is displayed.

The drive device 2 is a drive means of the present invention, and includes a metal case 21, a crossed coil 22, a meter shaft 23, and a resin support member 24. The case 21 has a bowl shape, houses a crossed coil 22 therein, and has a support member 24 fixed to its outer periphery. The intersecting coil 22 rotates the meter shaft 23 by a predetermined amount depending on the amount of current supplied.

The meter shaft 23 is a rotating shaft of the present invention, and one end thereof is rotatably disposed within the cross coil 22 and rotates integrally with the pointer assembly 3 and the insulator assembly 4.

The support member 24 fastens the fixer plate assembly 5 with screws or the like.

3 to 7 are diagrams showing the pointer assy 3. FIG.

The pointer assembly 3 includes a self-luminous pointer 31 and a pointer fixing device 3.
2, and one and the other first terminal 33.3
It has 4.

The self-luminous pointer 31, as shown in Section 8 and FIG. 9,
It is composed of a discharge tube having a bulb 31a, an internal electrode 31b, and an external electrode 31c.

The bulb 31a is a light emitting element of the present invention, and has an elongated hollow rod shape, and is filled with an inert gas containing a mixture of xenon and neon. The outer peripheral surface of this bulb 31a is covered with a light-shielding coating 31 having a light-transmissible slit 31d.
covered by e.

The valve 31a has an internal electrode 31b and an external electrode 31c.
When power is supplied from the internal electrode 31b and the external electrode 3
1c, a glow discharge occurs, and the effect of the fluorescent coating 31f results in high-intensity visible light.

The internal electrode 31b is disposed at the end of the valve 31a on the axis side, and is supplied with current from the power receiving section 31g.

The external electrode 31c is formed by applying a conductive paste such as carbon phenol or silver paste to the outer peripheral surface of the bulb 31 in the longitudinal direction. This external electrode 31c
The pointer fixing device 32 is a pointer fixing means of the present invention, to which current is supplied via the power receiving section 31h,
It is composed of a pointer boss 32a, a pointer cover 32b, a weight 32c, and a holding member 32d.

The pointer boss 32a is made of resin such as polysulfone.
A cylindrical insertion part 32e that is fitted to the outer periphery of the tip of the meter shaft 23, and a cross-sectional shape that is provided to intersect orthogonally to the insertion part 32e and that holds the rear end of the self-luminous pointer 31 is open. It has an annular holding portion 32f. Three protrusions 32g that contact the rear end portion of the self-luminous pointer 31 are formed on the inner circumference of the holding portion 32f.

The pointer cover 32b is fixed to the pointer boss 32a so as to cover the opening of the pointer boss 32a.

The inner wall surface of the pointer cover 32b has two protrusions 32h formed on the outer periphery of the pointer boss 32a.
Two claw portions 32i are formed.

The weight 32 [: is used to balance the self-luminous pointer 31. The holding member 32d holds and fixes the weight 32c within the pointer cover 32b.

One and the other first terminals 33, 34 are first power supply terminals of the present invention, and are made of conductive metal. One and the other first terminals 33, 34 have substantially inverted Ω-shaped clamping parts 33a, 34a that sandwich and hold the external electrode 31c of the bulb 31a, and the clamping parts 33a, ? ) Arm portion 3 extending from Aa in the left-right direction in the drawing
3b, 34b, and connecting portions 33c, 34c that are suspended from the arm portions 33b, 34b in all directions. The connecting portions 33c and 34c are provided with a pair of pressing portions 33d and 34d for ensuring conduction.

10 to 13 are diagrams showing the insulator assembly 4. FIG.

The insulator assembly 4 has one and the other hair springs 41 , 42 , one and the other first terminal pins 43 , 44 , and an insulating plate (insulator plate) 45 .

14 and 15 are views showing one hairspring 41, and FIGS. 16 and 17 are views showing the other hairspring 42.

One and the other hair springs 41 and 42 are full springs of the present invention, and are made of conductive phosphor bronze and have a thickness of 0.0.
A thin plate of approximately 4+m is used to bias the meter shaft 23 and pointer assembly 3 in the direction of returning them to their starting points. Therefore, the meter shaft 23 and the pointer assembly 3 are always kept at the starting point due to the combined force of the spring force that causes the negative hairspring 41 to return to its natural length and the spring force that causes the other hairspring 42 to return to its natural length. Trying to go back.

The inner peripheral ends 41a, 42a of one and the other hair springs 41, 42 are connected to the first terminal pin 4 and the other first terminal pin 4, respectively.
3. Metal cylindrical members 41b into which 44 are inserted, respectively;
42b by press fitting. Moreover, the - side and the other hairsprings 41, 42 have spirally wound spiral parts 41c, 42c, and the spiral parts 41c, 42.
Outer peripheral ends 41d and 42d extending radially outward from c
Equipped with. These outer peripheral ends 41d and 42d are connected to connecting portions 41e and 42e that are connected to one and the other second terminals 51.52, respectively, which will be described later, and this connecting portion 41e.
, 42e are provided with locked portions 41f, 42f bent radially outward from the spiral portions 41c, 42c in a hook shape.

One and the other first terminal pins 43, 44 are made of conductive metal, and one end is inserted into the cylindrical member 41b, 42b, and the other end is connected to the one and the other first terminal 33, 44.
．． It is inserted into the connecting portions 33c and 34c of 34 to electrically connect the two.

The insulating plate 45 is made of insulating resin and has an annular shape, and is disposed between one hairspring 41 and the other hairspring 42 in order to insulate one hairspring 41 and the other hairspring 42. It is set up. This insulation board 4
Reference numeral 5 denotes a hole 45a into which the meter shaft 23 is inserted, one hollow boss portion 45b protruding upward in the figure from the front surface, and the other hollow boss portion 45c protruding downward in the figure from the back surface. Equipped with

The boss portions 45b and 45c on the one side and the other side are formed by protruding the tips of the first terminal pins 43.44 on the one side and the other side.
This is to hold and fix the rear end of the. In addition, insulation W, 4
A protruding stopper 45e having a step 45d on the opposite side of the rotating direction of the insulating plate 45 is provided on the outer peripheral edge of the insulating plate 45.

18 to 20 are diagrams showing the fixer plate assembly 5. FIG.

The fixer plate assembly 5 includes second terminals 51.52 on one side and the other side, third terminals 53.54 on one side and the other side, a second terminal pin 55 on one side, a second terminal pin (not shown) on the other side, and a fixer plate assembly 5. It has a wedge plate 56.

21 to 23 are views showing one second terminal 51, and FIGS. 24 to 26 are views showing the other second terminal 52.

One and the other second terminals 51, 52 are second power supply terminals of the present invention, and are made of conductive metal. One and the other second terminals 51 and 52 are formed on flat contact portions 51a and 52a that contact the surface of the fixer plate 56.
It is fixed to the fixer plate 56 by caulking b. Further, the distal ends of the arm plate portions 51c and 52c raised from the abutments N551a and 52a are provided with locked portions 41f of one and the other hair springs 41.42,
Groove-shaped locking portions 51d and 52d are formed to lock 42f. Extension portions 5te and 52e extending from the locking portions 51d and 52d toward the fixer plate 56 include folded walls 51f and 52f that are elastically deformable and folded back in the left-right direction, and the folded walls 51f. , 52f, and is folded back in the vertical direction.
g, 52g, and a bent wall 51h bent from the fixer plate 56 side end of the folded wall 51g and 52g,
52h is provided. In addition, the folding walls 51f, 5
2f and the folded walls 51g, 52g, the connection portion 41e of one and the other hairsprings 41.42 is formed between them.
, 42e are inserted into the insertion portions 51i, 52i. The insertion portions 51i, 52i are caulked with the connection portions 41e, 42e of one and the other hair springs 41.42 inserted.
Electrical connections are made between e and 42e and insertion portions 51i and 52i.

Note that the insertion portion 511 of one second terminal 51 is provided at a higher position than the insertion portion 52i of the other second terminal 52.

On the other hand, the connecting portion 51 vertically extends from the contact portions 51a and 52a.
j, 52j are one and the other third terminal 5
3.54 is connected.

The one and the other third terminals 53,54 are connected to the second
As shown in FIGS. 7 and 28, insertion portions 53a and 54a insert and hold and fix the connecting portions 51j and 52j of one and the other second terminals 51 and 52, and one second terminal pin 55 and It includes insertion parts 53b and 54b into which the other second terminal bin is inserted and held and fixed.

One second terminal pin 55 and the other second terminal pin are connected to one and the other second terminal 51 .
52.

The fixer plate 56 includes a rectangular plate portion 56a, first and second support portions 56b and 56c hanging from the plate portion 56a, and two support members 24 of the drive device 2.
and two mounting portions 56d that are fastened to each other by screws or the like.

The plate portion 56a has an insertion hole 56e in the center through which the meter shaft 23 is rotatably inserted, and a circular recess 56f formed around the outer periphery of the insertion hole 56e for housing the second hairspring 42. .

Axial holes 56g, 5 of first and second support parts 56b, 56c
Within 6h, one and the other second terminal 51.5
2 connection parts 51j, 52j, one and the other third terminals 53, 54, one second terminal pin 5
5 and the tip of the other second terminal bin are inserted.

The method of assembling the engine tachometer 1 of this embodiment will be explained based on the drawings.

A fixer plate assy 5 is assembled to the drive device 2, and then an insulator assy 4 is assembled to the fixer plate assy 5.

The insulator assembly 4 is assembled by press-fitting the meter shaft 23 protruding from the fixer plate 56 and the hole 45a of the insulating plate 45 of the insulator assembly 4, and attaching the insulator to the fixer plate assembly 5 using fasteners such as screws. The bamboo is fixed by fixing the Ash 4. At this time, the other hairspring 42 is disposed between the circular recess 56f of the fixer plate 56 and the insulating plate 45.

Then, insert the connecting portion 41e of one hairspring 41 into the insertion portion 51i of one of the second terminals 51,
Positioning is performed by locking the hook-shaped locked portion 4if of one hairspring 41 to the groove-shaped locking portion 51d of one of the second terminals 51. Therefore, movement of the outer peripheral end 41d of one hairspring 41 in the y direction is restricted. After that, by caulking the insertion portion 51j, the outer peripheral end 41d of one hairspring 41 is
, restricts movement in the vertical direction, and connects the outer peripheral end 41d of one hairspring 41 and one second terminal 5.
An electrical connection is made with 1.

Similarly, insert the connecting portion 42e of the other hairspring 42 into the insertion portion 52i of the other second terminal 52,
Positioning is performed by stopping the hook-shaped locked portion 42f of the other hairspring 42 in the groove-shaped locking portion 52d of the other second terminal 52. Therefore, movement of the outer peripheral end 42d of the other hairspring 42 in the y' direction is restricted. Thereafter, by caulking the insertion portion 52i, the outer peripheral end 42d of the other hairspring 42 is
, the movement in the Z direction is restricted, and the outer peripheral end 42d of the other hairspring 42 and the other second terminal 52
An electrical connection is made with the

Therefore, one and the other hairspring 41.4
The spiral portions 41c and 4 at the outer peripheral ends 41d and 42d of 2
Since the movement in the y direction, which is the radial direction of 2c, is restricted by M, the insertion portions 51 of one and the other second terminals 51 and 52
When staking i and 52i, it is possible to prevent the connecting portions Ale and 42e of one and the other hairsprings 41, 42 from shifting from the conductive location. As a result, the insertion portions 51i, 52i of the second terminals 51.52 on one side and the other side and the outer peripheral ends 41 of the hair springs 41.42 on the one side and the other side
d and 42d can be prevented.

Further, the electrical connection between the insertion portions 51i, 52i of the second terminals 51.52 on one side and the outer circumferential ends 41d, 42d of the hair springs 41.42 on the other side is established by caulking the insertion portions 51i, 52i. There is no need for soldering. For this reason, the flux is applied to electric parts such as the crossed coil 22 of the drive device 2, the spiral portions 41c and 42C of one and the other hair springs 41.42, and the meter shaft 23 and the spiral portions of one and the other hair springs 41.42. This prevents it from adhering to rotating parts such as 41c and 42c. Therefore, the meter shaft 23 rotates by a predetermined amount of rotation depending on the amount of current supplied to the crossed coil 22. Moreover, one hairspring 4 and the other hairspring 4
1.42 will surely follow the meter axis 23. As a result, the pointing accuracy of the self-luminous pointer 31 of the pointer assembly 3 can be improved.

(Modification) In this embodiment, the hairsprings are disposed on both sides of the insulator, but the hairsprings may be disposed only on one side of the insulator.

In this embodiment, both hairsprings and both second terminals are connected only by caulking, but one or the other hairspring and one or the other second terminal may be connected only by caulking.

In this embodiment, the outer peripheral end of the hairspring is inserted into two folded walls (insertion parts), but the outer peripheral end of the hairspring may be inserted into a cylindrical insertion part, a hook-shaped insertion part, or the like.

In this embodiment, the locking portion at the outer peripheral end of the second terminal is shaped like a groove, but the locking portion at the outer peripheral end of the second terminal may be a hole, a protrusion, or the like. Moreover, the design of the locked part at the outer peripheral end of the hairspring can be freely changed as long as it has a shape that can be locked by the locking part at the outer peripheral end of the second terminal.

[Brief explanation of the drawing]

1 to 28 show one embodiment of the present invention. 1st
The figure is a perspective view showing the main parts of the other second terminal.
The figure is a sectional view showing the main parts of the engine tachometer, Figure 3 is a perspective view showing the pointer assembly disassembled, and No. 4121
FIG. 2 is a diagram showing the main parts of the pointer assembly. Figure 5 is the 4th
FIG. 6 is a sectional view taken along line AA in the figure, FIG. 6 is a sectional view taken along line BB in FIG. 4, and FIG. 7 is a sectional view taken along line CC in FIG. FIG. 8 is a plan view of the self-luminous pointer, and FIG. 9 is a plan view showing the state of the self-luminous pointer before being coated with a light-shielding coating. Fig. 10 is a perspective view showing an exploded insulator assy, Fig. 11 is a sectional view showing the insulator assy, Fig. 12 is a plan view showing the insulator assy, and Fig. 12 is a plan view showing the insulator assy.
FIG. 3 is a back view of the insulator assembly. 1st
Fig. 4 is a plan view showing one hairspring, Fig. 15 is a sectional view showing one hairspring, Fig. 16 is a plan view showing the other hairspring, and Fig. 17 is a sectional view showing the other hairspring. It is. Figure 18 is a plan view showing the fixer plate assembly.
9 is a front view showing the fixer plate assembly, and FIG. 20 is a sectional view taken along line DD in FIG. 18. Figure 21 is a plan view showing one of the second terminals;
The figure is a front view showing one of the second terminals, and FIG. 23 is a plan view showing the main part 3 of one of the second terminals. 24th
The figure is a plan view showing the other second terminal, FIG. 25 is a front view showing the other second terminal, and FIG. 26 is a plan view showing essential parts of the other second terminal. FIG. 27 is a plan view showing one and the other third terminal, and FIG. 28 is a sectional view taken along the line E-E in FIG. 27. In the figure 1... Engine tachometer (instrument device) 2... Drive unit N (drive means) 23... Meter shaft (rotating shaft) 31.
・Self-luminous pointer 31a...bulb (light emitting element) 32・
・Pointer fixing bag M (pointer fixing means> 33...one first
Terminal (first power supply terminal) 34...Other first terminal (first power supply terminal) 41, one hairspring (
Spiral spring) 41d...Outer peripheral end portion 41f...Locked portion 42...Other hair spring (swirl spring) 42
d...Outer peripheral end 42f...Locked part 51...One second terminal (second power supply terminal) 51d...Locking part 51i...Insertion part/other second terminal (second power supply terminal) Terminal) 52d... Stop part 2i Insertion part agent Kenji Ishiguro 42... Other hair spring (spiral spring) 42d Outer peripheral end 42f... Locked part 52... Other second terminal (second terminal) 2 power supply terminal) 2d ・A system stop part Fig. 1 M Fig. 11 Fig. 12 Fig. 13 M ■) tD (1 terminal n- Fig. 27 Fig. 28

Claims (1)

[Scope of Claims] 1) A self-luminous pointer having a driving means for rotating a rotating shaft according to an input signal, a light-emitting element that emits light when electric power is supplied, and a self-luminous pointer that rotates a rotating shaft according to an input signal; a pointer fixing means fixed to the pointer fixing means; a first power feeding terminal fixed to the pointer fixing means and supplying power to the light emitting element; and a conductive spiral spring having an inner peripheral end connected to the first power feeding terminal. , a second power supply terminal connected to the outer circumferential end of the spiral spring and supplying power to the spiral spring, the second power supply terminal being inserted into the outer circumferential end of the spiral spring and swaged with the outer circumferential end of the spiral spring inserted. 1. A measuring instrument device, characterized in that the insertion portion and the outer circumferential end of the spiral spring are electrically connected to each other only by caulking the insertion portion. 2) The second power supply terminal has a locking part such as a groove, a hole, or a protrusion radially outward of the spiral spring from the insertion part, and the outer peripheral end of the spiral spring is inserted into the insertion part. 2. The instrument device according to claim 1, wherein the locking portion has a locked portion radially outward of the spiral spring from a portion where the spiral spring is moved in the radial direction.