JPH0820281B2 - Instrumentation - Google Patents

Description

Description: [Industrial field of use] The present invention relates to an instrument device having a self-luminous indicator that emits light when power is supplied.

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

The electric power is supplied to the light emitting element through a conductive spiral spring (hair spring).

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

The second power supply terminal and the outer peripheral end of the spiral spring are electrically connected to each other by soldering the second power supply terminal and the outer peripheral end of the spiral spring, or after caulking the caulked portion of the second power supply terminal. It was done by doing.

[Problems to be Solved by the Invention] However, in the case where the second power supply terminal and the outer peripheral end of the spiral spring are electrically connected by soldering as in the conventional case, the soldering location is too small, so There was a possibility that the material (flux) would be scattered. Therefore, in the drive device having the cross coil that rotates the meter shaft according to the energization amount, when the solder material scattered from the soldering point adheres to the cross coil, the windings of the cross coil are electrically connected to each other. There was a problem that it caused a short circuit. Therefore, since the magnetic force of the cross coil changes, there is a possibility that the drive amount of the meter shaft corresponding to the energization amount cannot be obtained.

In addition, the solder material may adhere to the spiral portion of the hair spring, and the hair spring may be fixed so that it does not follow the meter shaft. Further, the solder material may adhere between the meter shaft and the fixing member, and the meter shaft may not rotate.

Therefore, when the second power supply terminal and the outer peripheral end of the spiral spring are electrically connected by soldering, there is a problem in that the rotating component or the electrical component becomes defective and the pointing accuracy of the self-luminous indicator is lowered.

An object of the present invention is to provide an instrument device that prevents a decrease in the pointing accuracy of a self-luminous indicator.

[Means for Solving the Problems] (Claim 1) A measuring device according to the present invention includes a driving unit that rotates a rotating shaft according to an input signal, and a light emitting element that emits light when power is supplied. A light emitting pointer, a pointer fixing means for fixing the self-luminous pointer to the rotating shaft, a first feeding terminal fixed to the pointer fixing means for supplying electric power to the light emitting element, and an inner peripheral end portion of the first pointer. 1 is provided with a conductive spiral spring connected to a power supply terminal, and a second power supply terminal connected to an outer peripheral end portion of the spiral spring and supplying electric power to the spiral spring, wherein the second power supply terminal is the spiral. In the insertion portion into which the outer peripheral end portion of the spring is inserted, a folded-back portion elastically deformable so that a biasing force acts on the outer peripheral end portion side of the spiral spring, and between the folded-back portion, Caulking part that crimps the outer peripheral edge with the outer peripheral edge inserted Has, conduction between the outer peripheral end portion of the spiral spring and the insertion portion of the second power supply terminal adopts the technical means that are performed only by the crimping of the crimping portion.

[Operation] (Claim 1) Conduction between the insertion portion of the second power supply terminal and the outer peripheral end portion of the spiral spring is conducted after the outer peripheral end portion of the spiral spring is inserted into the insertion portion of the second power supply terminal. Since soldering is performed only by tightening, no solder material is required. Therefore, the solder material does not adhere to the driving means, the rotating shaft, the rotating parts such as the spiral spring, and the electric parts such as the spiral spring. Therefore, the rotation shaft is rotated by a predetermined rotation amount according to the input signal, and the spiral spring surely follows the rotation shaft.

Further, since the folded portion is provided in the insertion portion into which the outer peripheral end portion of the spiral spring is inserted, even after the outer peripheral end portion of the spiral spring is crimped by the caulking portion, the urging force of the folded portion causes It is generated so that the outer peripheral end of the spiral spring is pressed against the caulked portion.

According to a second aspect of the present invention, the locked portion provided radially outward of the spiral spring with respect to the portion inserted into the insertion portion at the outer peripheral end of the spiral spring is locked by the locking portion of the second power supply terminal. Radial movement of the spring is restricted. Therefore, when the insertion portion of the second power supply terminal is caulked, there is no fear that the conductive portion between the insertion portion and the outer peripheral end of the spiral spring is displaced.

EFFECTS OF THE INVENTION (Claim 1) Since it is possible to establish electrical continuity between the insertion portion of the second power supply terminal and the outer peripheral end portion of the spiral spring without using soldering, a self-luminous indicator due to scattering of the solder material. It is possible to prevent a decrease in the instruction accuracy of.

Also, since the folded portion is provided in the insertion part where the outer peripheral end of the spiral spring is inserted, the repulsion in the direction in which the caulked part opens temporarily with the aging after the outer peripheral end of the spiral spring is caulked by the caulked part. Even if a force is generated, it is possible to prevent the holding and fixing of the outer peripheral end of the spiral spring from being loosened by the biasing force of the folded portion.

(Claim 2) It is possible to prevent defective conduction between the insertion portion of the second power supply terminal and the outer peripheral end portion of the spiral spring.

[Embodiment] An instrument device of the present invention will be described based on an embodiment shown in Figs. 1 to 28.

FIG. 1 is a diagram showing a main part of a second power supply terminal, and FIG. 2 is a diagram showing an engine tachometer.

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

The drive device 2 is the drive means of the present invention, and has a metal case 21, a cross coil 22, a meter shaft 23, and a resin support member 24. The case 21 has a bowl shape, the cross coil 22 is housed inside, and the support member 24 is fixed to the outer peripheral edge.
The cross coil 22 rotates the meter shaft 23 by a predetermined amount according to the amount of energization. The meter shaft 23 is a rotating shaft of the present invention, and one end thereof is rotatably disposed in 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 views showing the pointer assembly 3.

The pointer assembly 3 includes a self-luminous pointer 31, a pointer fixing device 3
2, and one and the other first terminal 33, 34.

The self-luminous pointer 31, as shown in FIGS. 8 and 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 a shape of an elongated hollow rod, and is filled with an inert gas in which xenon and neon are mixed. The outer peripheral surface of the bulb 31a is covered with a light-shielding coating 31e having a slit 31d capable of transmitting light. When electric power is supplied from the internal electrode 31b and the external electrode 31c to the bulb 31a, glow discharge occurs between the internal electrode 31b and the external electrode 31c, and the fluorescent coating 31f.
By the action of, it becomes a high-luminance visible light.

The internal electrode 31b is arranged at the end of the bulb 31a on the axial center side, and is supplied with current from the power receiving portion 31g. The external electrode 31c is
A conductive paste such as a noble metal paste such as carbon phenol or silver is applied in the longitudinal direction of the outer peripheral surface of the valve 31a. A current is supplied to the external electrode 31c via the power receiving unit 31h.

The pointer fixing device 32 is the pointer fixing means of the present invention,
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 portion 32e fitted to the outer periphery of the tip end portion of the meter shaft 23, and a cross-sectional shape that is provided so as to intersect the insertion portion 32e in a direction orthogonal to the opening portion and that holds the rear end portion of the self-luminous indicator 31 are open. It has an annular holding portion 32f. On the inner circumference of the holding portion 32f, there are three protrusions 32g that come into contact with the rear end of the self-luminous indicator 31.
Are formed.

The pointer cover 32b is fixed to the pointer boss 32a so as to cover the opening of the pointer boss 32a. On the inner wall surface of the pointer cover 32b, two claw portions 32i that engage with the two protrusions 32h formed on the outer periphery of the pointer boss 32a are formed.

The weight 32c balances the self-luminous pointer 31. The holding member 32d covers the weight 32c with the pointer cover.
It is to be held and fixed in 32b.

The one and the other first terminals 33, 34 are the first power supply terminals of the present invention, and are made of a conductive metal. The one and the other first terminals 33, 34 have substantially inverted Ω-shaped holding portions 33a, 34a for holding and fixing the outer electrode 31c of the valve 31a, and extended from the holding portions 33a, 34a in the left-right direction in the drawing. Arms 33b and 34b and these arms 33b and 34b
And connecting portions 33c and 34c hanging downward from the drawing.
The connecting portions 33c and 34c are provided with a pair of pressing portions 33d and 34d for surely establishing electrical continuity.

10 to 13 are views showing the insulator assembly 4.

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

FIGS. 14 and 15 are views showing one hair spring 41, and FIGS. 16 and 17 are the other hair spring 41.
FIG.

The one and the other hair springs 41 and 42 are spiral springs of the present invention, and are thin plates made of conductive phosphor bronze with a thickness of about 0.04 mm, and are arranged in a direction to return the meter shaft 23 and the pointer assembly 3 to the starting point. Energize. For this reason, the meter shaft 23 and the pointer assembly 3 are always returned to the starting point by a combined force of the spring force of one hair spring 41 returning to the natural length and the spring force of the other hair spring 42 returning to the natural length. To try.

Inner peripheral end portion 41 of one and the other hair spring 41, 42
The a and 42a are press-fitted and connected to metal cylindrical members 41b and 42b into which the first and the other first terminal pins 43 and 44 are respectively inserted. Also, one and the other hairspring
41 and 42 are spiral parts 41c and 42c that are spirally wound,
Outer peripheral end portions 41d and 42d extending radially outward from the spiral portions 41c and 42c are provided. The outer peripheral end portions 41d, 42d are connecting portions 41e, 42e respectively connected to one and the other second terminals 51, 52 described later, and radially outward of the spiral portions 41c, 42c from the connecting portions 41e, 42e. And hooked portions 41f and 42f that are bent in a hook shape.

The one and the other first terminal pins 43, 44 are made of a conductive metal, and one ends thereof are inserted into the tubular members 41b, 42b,
The other end is inserted into the connecting portions 33c and 34c of the first and second first terminals 33 and 34 to electrically connect the two.

The insulating plate 45 has an annular shape made of an insulating resin, and is arranged between the one hair spring 41 and the other hair spring 42 in order to insulate the one hair spring 41 from the other hair spring 42. It is set up. The insulating plate 45 includes a hole portion 45a into which the meter shaft 23 is inserted, one hollow boss portion 45b projecting upward from the surface in the figure, and the other hollow boss portion 45b projecting downward from the back surface in the figure. A boss portion 45c is provided.
The one and the other boss portions 45b and 45c hold and fix the rear end portions of the one and the other first terminal pins 43 and 44 in a state where the tip portions of the one and the other first terminal pins 43 and 44 are projected. Is. Further, on the outer peripheral edge of the insulating plate 45,
A protruding stopper 45e having a step 45d is provided on the opposite side of the rotating direction of the insulating plate 45.

18 to 20 are views showing the fixer plate assembly 5.

The fixer plate assembly 5 includes a second one of the one and the other.
Terminals 51 and 52, one and the other third terminal 5
3, 54, one second terminal pin 55, the other second terminal pin (not shown) and a fixer plate 56.

21 to 23 are views showing one second terminal 51, and FIGS. 24 to 26 are the other second terminal 51.
It is a figure which shows 52.

The one and the other second terminals 51 and 52 are the second power supply terminals of the present invention, and are made of a conductive metal. The one and the other second terminals 51 and 52 are flat plate-shaped contact portions 51 a and 5 that contact the surface of the fixer plate 56.
It is fixed to the fixer plate 56 by caulking the pair of protrusions 51b, 52b formed on the 2a. Further, at the tips of the arm plate parts 51c, 52c raised from the contact parts 51a, 52a, groove-shaped engagements for engaging the engaged parts 41f, 42f of the one and the other hair springs 41, 42 are formed. Stops 51d and 52d are formed. Then, from the locking portions 51d and 52d, the fixer plate
The extension portions 51e and 52e extended to the 56 side are provided to be elastically deformable, and are provided with folding walls 51f and 52f as folding portions that are folded back in the left-right direction and facing the folding walls 51f and 52f. And the folded wall as a crimped part that is folded up and down
51g, 52g and this folded wall 51g, 52g fixer plate
Bending walls 51h and 52h bent from the end portion on the 56 side are provided. Also, the folding walls 51f and 52f and the folding walls 51g and 52g
And between these one and the other hairspring 4
Insertion parts 51i, 52i into which the connection parts 41e, 42e of 1, 42 are inserted
It has been. The insertion portions 51i, 52i are caulked with the connection portions 41e, 42e of the one and the other hair springs 41, 42 being inserted, so that the connection portions 41e, 42e and the insertion portions 51i, 52i are electrically connected. Is done. The insertion portion 51i of the second terminal 51 on one side is provided at a position higher than the insertion portion 52i of the second terminal 52 on the other side.

On the other hand, the connection parts 51j and 52j hung from the contact parts 51a and 52a.
Are connected to one and the other third terminal 53, 54.

As shown in FIGS. 27 and 28, one and the other third terminals 53 and 54 are inserted to hold and fix the connecting portions 51j and 52j of the one and the other second terminals 51 and 52. The parts 53a and 54a and the insertion parts 53b and 54b for inserting and holding and fixing the one second terminal pin 55 and the other second terminal pin are provided.

The one second terminal pin 55 and the other second terminal pin are connected to the one and the other second terminals 51, 52.
To supply power.

The fixer plate 56 includes a rectangular plate portion 56a,
First and second support portions 56 depending from the plate portion 56a
b and 56c, and two attachment portions 56d that are fastened to the two support members 24 of the drive device 2 with screws or the like.

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

In the axial holes 56g and 56h of the first and second support portions 56b and 56c, the connecting portion 51 of the one and the other second terminals 51 and 52 is provided.
j, 52j and one and the other third terminal 53, 54
Then, one of the second terminal pins 55 and the tip of the other second terminal pin are inserted.

A method of assembling the engine tachometer 1 of this embodiment will be described with reference to the drawings.

The fixer plate assembly 5 is assembled to the drive device 2, and then the insulator assembly 4 is assembled to the fixer plate assembly 5.

The insulator assembly 4 is assembled by press-fitting the meter shaft 23 projecting from the fixer plate 56 and the hole portion 45a of the insulating plate 45 of the insulator assembly 4 and fixing the insulator plate 45 to the insulator plate assembly 5 with a fastener such as a screw. This is done by fixing the assembly 4. At this time, the other hair spring 42 is a fixer plate.
It is arranged between the circular recess 56f of 56 and the insulating plate 45.

Then, the connection portion 41e of the one hair spring 41 is inserted into the insertion portion 51i of the one second terminal 51, and the hooked locked portion 41f of the one hair spring 41 is formed into the groove shape of the one second terminal 51. Positioning is performed by engaging with the engaging portion 51d. For this reason, one hairspring 41
The movement of the outer peripheral end portion 41d in the y direction is restricted. After that, by caulking the insertion portion 51i, the movement of the outer peripheral end 41d of the one hair spring 41 in the x direction and the vertical direction is restricted, and the outer peripheral end 41d of the one hair spring 41 is regulated.
And the second second terminal 51 on one side is electrically connected.

Similarly, the connection portion 42e of the other hair spring 42 is inserted into the insertion portion 52i of the other second terminal 52, and the hooked locked portion 42f of the other hair spring 42 is inserted into the groove of the other second terminal 52. Positioning is performed by locking the locking portion 52d. Therefore, the other hairspring 42
The movement of the outer peripheral end portion 42d in the y direction is restricted. After that, by caulking the insertion portion 52i, the movement of the outer peripheral end portion 42d of the other hair spring 42 in the x and z directions is restricted, and the outer peripheral end portion 42d of the other hair spring 42 and the other second terminal. An electrical connection with 52 is made.

Therefore, one and the other hairspring 41, 42
Since the movement of the spiral portions 41c, 42c in the outer circumferential end portions 41d, 42d in the y direction, which is the radial direction, is restricted, when caulking the insertion portions 51i, 52i of the one and the other second terminals 51, 52, Connection part 41 of one and the other hairspring 41, 42
It is possible to prevent the shift of the e and 42e from the conductive portion. As a result,
Insertion portions 51i, 5 of one and the other second terminals 51, 52
2i and the outer peripheral ends of the one and the other hair springs 41 and 42
It is possible to prevent defective conduction with 41d and 42d.

The folding wall 51f of the insertion portion 51i of the second terminal 51 on one side is provided on the outer peripheral end portion 41d side of the one hair spring 41 to be crimped, so that the insertion portion 51i is inserted.
After the caulking, the folding wall 51f generates a repulsive force in the direction of the folding wall 51g existing on the opposite side. That is, the repulsive force is generated so as to be pressed toward the folding wall 51g side, so that even if the repulsive force is generated in the opening direction of the folding wall 51g with the aging after caulking, the folding walls 51f, 5
Outer edge of one hairspring 41 sandwiched between 1g
There is no fear that the holding and fixing of 41d will loosen. As a result, the outer peripheral end portion 41d of the one hair spring 41 is securely held semi-permanently between the folding walls 51f and 51g due to the presence of the folding wall 51f.

Similarly, since the folded wall 52f of the insertion portion 52i of the other second terminal 52 is provided on the outer peripheral end portion 42d side of the other hair spring 42 to be caulked, the insertion portion 52i is inserted.
After the caulking is performed, the folded wall 52f generates a repulsive force in the direction of the folded wall 52g existing on the opposite side. That is, the repulsive force is generated so as to be pressed toward the folding wall 52g side, and even if the repulsive force is generated in the opening direction of the folding wall 52g due to the change over time after caulking, the folding walls 52f, 5
The outer edge of the other hairspring 42 sandwiched between 2g
There is no fear that the holding and fixing of 42d will loosen. As a result, the outer peripheral end portion 42d of the other hair spring 42 is securely held semi-permanently between the folding walls 52f and 52g due to the presence of the folding wall 52f.

Further, since the electrical connection with the outer peripheral end portions 41d, 42d of the one and the other hair springs 41, 42 is performed only by caulking the insertion portions 51i, 52i, soldering is unnecessary. Therefore, the flux has electric components such as the cross coil 22 of the drive device 2 and the spiral parts 41c and 42c of the one and the other hair springs 41 and 42, and the meter shaft 23 and the spiral parts of the one and the other hair springs 41 and 42. It is possible to prevent attachment to rotating parts such as 41c and 42c. Therefore, the meter shaft 23 rotates by a predetermined rotation amount according to the amount of electricity supplied to the cross coil 22. Moreover, the one and the other hair springs 41 and 42 reliably follow the meter shaft 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 hair springs are arranged on both sides of the insulator, but the hair springs may be arranged only on one side of the insulator.

In the present embodiment, both hair springs and both second terminals are connected only by caulking, but one or the other hair spring and one or the other second terminal may be connected by only caulking.

In this embodiment, the engaging portion at the outer peripheral end of the second terminal is formed in a groove shape, but the engaging portion at the outer peripheral end of the second terminal may be a hole or a protrusion. Further, the locked portion at the outer peripheral end portion of the hair spring can be freely designed and modified as long as it has a shape that is locked to the lock portion at the outer peripheral end portion of the second terminal.

[Brief description of drawings]

1 to 28 show an embodiment of the present invention. 1 is a perspective view showing the main part of the other second terminal, FIG. 2 is a sectional view showing the main part of the engine tachometer, and FIG. 3 is a perspective view showing a disassembled pointer assembly. FIG. 3 is a diagram showing a main part of a pointer assembly. FIG. 5 shows A in FIG.
-A sectional view, FIG. 6 is a BB sectional view of FIG. 4, and FIG. 7 is a CC sectional view of FIG. FIG. 8 is a plan view of the self-luminous pointer, and FIG. 9 is a plan view showing a state before the light-shielding coating of the self-luminous pointer is applied. FIG. 10 is a perspective view showing a disassembled insulator assembly, and FIG. 11 is a sectional view showing the insulator assembly.
FIG. 12 is a plan view showing the insulator assembly, and FIG. 13 is a rear view showing the insulator assembly. FIG. 14 is a plan view showing one hair spring, FIG. 15 is a sectional view showing one hair spring, FIG. 16 is a plan view showing the other hair spring, and FIG. 17 is a sectional view showing the other hair spring. It is a figure. 18 is a plan view showing the fixer plate assembly, FIG. 19 is a front view showing the fixer plate assembly, and FIG.
It is the DD sectional view of a figure. FIG. 21 is a plan view showing one second terminal, FIG. 22 is a front view showing one second terminal, and FIG. 23 is a plan view showing an essential part of one second terminal. FIG. 24 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 an essential part 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 EE of FIG. In the figure, 1 ... Engine tachometer (measuring device), 2 ... Driving device (driving means), 23 ... Meter shaft (rotating shaft), 31 ... Self-luminous pointer, 31a ... Bulb (light emitting element), 32 ... Pointer fixing device (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 part, 42 ... Other hairspring (spiral spring), 42d ... Outer peripheral end portion, 42f
...... Locked part, 51 ...... One second terminal (second power supply terminal), 51d ...... Locking part, 51f ...... Folded wall (folded part), 51g ...... Folded wall (crimped part), 51i …… Insert part,
52 ... The other second terminal (second power supply terminal), 52d ...
… Locking part, 52f …… Folding wall (folding part), 52g …… Folding wall (caulking part), 52i …… Inserting part

Claims (2)

[Claims] 1. A drive means for rotating a rotating shaft in response to an input signal, a self-luminous indicator having a light emitting element that emits light when electric power is supplied, and the self-luminous indicator is fixed to the rotating shaft. A pointer fixing means, a first feeding terminal fixed to the pointer fixing means for supplying power to the light emitting element, a conductive spiral spring having an inner peripheral end portion connected to the first feeding terminal, and the spiral. A second power supply terminal connected to an outer peripheral end of the spring and supplying electric power to the spiral spring, wherein the second power supply terminal is inserted in the outer peripheral end of the spiral spring into the insertion portion. A fold-back portion that is elastically deformable so that a biasing force is exerted on the outer-circumferential-edge end side of the coil spring, and the outer-peripheral end portion of the spiral spring is inserted between the fold-back portion and the fold-back portion. A portion of the second power supply terminal and the swirl Continuity between the outer peripheral edge portion of the meter unit, characterized in that it is made only by caulking of the caulking portion. 2. The second power supply terminal has a locking portion such as a groove, a hole or a projection, which is located radially outward of the spiral spring with respect to the insertion portion, and an outer peripheral end portion of the spiral spring has the insertion portion. The instrument according to claim 1, wherein the locking portion has a locked portion that is restricted in radial movement of the spiral spring from a portion inserted into the portion in a radial direction of the spiral spring. apparatus.