JPH09180796A - Connecting terminal and indicating instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excellently hold the electrical connecting condition at the time of inserting a terminal by enlarging the diameter of the inserting direction in the vertical direction, and relaxing the stress by the insertion of the terminal to be connected, while maintaining the contact condition with the terminal to be connected. SOLUTION: One end of a connecting terminal is fixed, and the other end thereof is provided with an opening 28 and an insertion part 29 continued to the opening 28. A main body part 26A of the connecting terminal is formed of a coil spring so as to realize the following condition at the time of inserting a pin terminal 20 as a terminal to be connected into the insertion part 29. Namely, when the pin terminal 20 is inserted in the direction X, while maintaining the contact condition with the pin terminal 20, inner diameter of the main body 26A is enlarged in the direction Y. Furthermore, the main body 26A of the connecting terminal is bent in the direction for relaxing the stress, which is to be generated by the insertion of the terminal pin 20. Consequently, this connecting terminal can easily cope with a positional displacement between the terminals and a dimensional displacement, and the stress with the terminal connection is relaxed and the electrical contact condition is surely held. Furthermore, since the influence of the mechanical vibration or the like can be lowered, this indicating instrument is appropriate for an on-vehicle instrument.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal for electrically connecting electric circuits and an indicating instrument using the connection terminal, and more particularly to a movement and a wiring board on which the movement is mounted. The present invention relates to a connection terminal for ensuring electrical connection between the terminals and a cross-coil type indicating instrument using the connection terminal.

[0002]

2. Description of the Related Art Conventionally, a current that is converted according to a measured amount is applied to a pair of coils that generate magnetic fields orthogonal to each other, and a magnet rotor is generated in a direction of a composite magnetic field obtained by combining the magnetic fields generated by the pair of coils. 2. Description of the Related Art There is known a cross-coil type indicating instrument in which a (rotator) is rotated and a measurement amount is displayed by a pointer which rotates with the magnet rotor. First Conventional Example FIG. 8A shows an external view of a main part of a cross coil type indicating instrument of a first conventional example.

[0003] The movement 101 of the indicating instrument has a cylindrical shield case 102 having an open upper end, and a coil bobbin 103 is accommodated inside the shield case 102. A conductive wire R is wound around the coil bobbin 103 so that two coils (not shown) are orthogonal to each other, and a rotating shaft 104 attached to the center of a disc-shaped magnet rotor (not shown) is rotatably arranged. A pointer (not shown) is attached to the tip of the rotating shaft 104.

A pair of holding flanges 106 projecting outward from the shield case 102 are integrally formed at diametrically symmetrical positions on the periphery of the coil bobbin 103, and each holding flange 106 has an upper end. Part 107A
One end of a conducting wire R constituting each coil is connected to the terminal, and a pin terminal 107 extending in the vertical direction along the peripheral surface of the shield case 102 is fitted.

[0005] The pin terminal 107 has a receptacle terminal 112, which has a leading end 107 A to which a conductor R forming a cross coil is tangled and soldered, and which is soldered to an HPC (Hard Printed Circuit) substrate 110 side by solder 111.
(Female side terminal). Second Conventional Example FIG. 8B shows an external view of the main part of the cross coil type indicator of the second conventional example.

[0006] The movement 121 of the indicating instrument has a cylindrical shield case 122 having an open upper end, and a coil bobbin 123 is accommodated inside the shield case 122. A conductive wire R is wound around the coil bobbin 123 so that two coils (not shown) are orthogonal to each other, and a rotating shaft 124 attached to the center of a disk-shaped magnet rotor (not shown) is rotatably arranged. A pointer (not shown) is attached to the tip of the rotating shaft 124.

[0007] A pair of holding flanges 126 projecting outward from the shield case 102 are integrally formed at symmetrical positions in the diameter direction of the peripheral edge portion of the coil bobbin 123. Part 127A
Is connected to one end of a conducting wire R constituting each coil, and is fitted with a pin terminal 127 extending vertically along the peripheral surface of the shield case 122.

The pin terminal 127 has a tip 127A to which a conductor R of a cross coil is entangled and soldered,
A round terminal 113 (male side terminal) brazed by solder 111 on the substrate 110 side is fitted.

[0009]

When the above-mentioned conventional movement 101 or movement 121 is inserted or fitted into the terminal on the HPC board side, the movement 1
When a shift occurs between the terminal positions 01 and 121 and the corresponding terminal position provided on the HPC board 110 side, the stress caused by the shift concentrates on the terminal contact portion (terminal contact portion) and the electrical connection is poor. There was a problem that it might cause.

Therefore, an object of the present invention is to prevent connection failure and improve reliability when electrically connecting a movement and a substrate on which the movement is to be mounted. Another object of the present invention is to provide a cross-coil type indicating instrument using this connection terminal.

[0011]

According to the first aspect of the present invention,
One end is fixed and has an opening provided on the other end side and an insertion portion continuous with the opening, and when the connected terminal is inserted into the insertion portion through the opening, While the contact state is maintained, the connecting means is capable of expanding in a direction perpendicular to the insertion direction and bending in a direction that alleviates the stress generated by the insertion of the connected terminal.

According to the first aspect of the present invention, the connecting means maintains the contact state with the connected terminal and is perpendicular to the inserting direction when the connected terminal is inserted into the insertion portion through the opening. By expanding the diameter in any direction and bending in a direction that alleviates the stress generated by the insertion of the connected terminals, the electrical connection is reliably retained.

According to a second aspect of the present invention, in the first aspect of the invention, the insertion portion is configured to have a substantially trumpet shape in cross section. According to the invention described in claim 2, in addition to the function of the invention described in claim 1, since the insertion portion has a substantially trumpet shape in cross section, the connected terminal can be easily inserted.

According to a third aspect of the present invention, in the first or second aspect of the invention, the connecting means is constituted by a coil spring in which a steel wire is formed into a coil shape. According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, since the connecting means is constituted by a coil spring in which a steel wire is formed in a coil shape, the contact state is maintained. At the same time, the electrical connection is relaxed by easily bending the stress associated with the insertion of the connected terminal.

According to a fourth aspect of the present invention, in an indicating instrument including a movement and a wiring board mounted in a state where the movement is electrically connected, the movement is any one of the first to third aspects. The connection terminal according to claim 1 is provided, and the connected terminal corresponding to the connection terminal is arranged on the wiring board.

According to a fourth aspect of the invention, the movement has the connection terminal according to any one of the first to third aspects, and a connected terminal corresponding to the connection terminal is provided on the wiring board. Since it is arranged, when attaching the movement to the wiring board, the connection terminal expands in the direction perpendicular to the insertion direction while maintaining the contact state with the connected terminal and bends due to the insertion of the connected terminal, The stress generated can be relaxed.

Therefore, the electrical connection between the movement and the wiring board is surely made, and it is less susceptible to mechanical vibration. According to a fifth aspect of the present invention, in an indicating instrument including a movement and a wiring board mounted in a state where the movement is electrically connected, any one of the first to third aspects on the wiring board. The connection terminal according to claim 1 is arranged, and the movement is configured to have a connected terminal corresponding to the connection terminal.

According to the invention of claim 5, the connection terminal according to any one of claims 1 to 3 is arranged on the wiring board, and the movement is connected to the connection terminal corresponding to the connection terminal. Since it has a terminal, when mounting the movement on the wiring board, the connection terminal expands in the direction perpendicular to the insertion direction while maintaining the contact state with the connected terminal, and it bends due to the insertion of the connected terminal. By alleviating the applied stress, the electric connection between the movement and the wiring board is surely made, and it becomes less susceptible to mechanical vibration and the like.

[0019]

Preferred embodiments of the present invention will now be described with reference to the drawings. First Embodiment FIG. 1 is an external perspective view of a cross coil type indicator of the first embodiment during assembly of a movement and a wiring board.

The movement 11 of the indicating instrument has a cylindrical shield case 12 having an open upper end,
A coil bobbin 13 is accommodated inside the shield case 12. A conductor R is wound around the coil bobbin 13 so that the two coils are orthogonal to each other, and a rotary shaft 14 attached to the center of a disk-shaped magnet rotor (not shown) is rotatably arranged. A pointer (not shown) is attached to the tip of the rotary shaft 14. Further, a spiral spring 15 for zeroing is attached to the rotary shaft 14 for returning a pointer (not shown) to the zero position when no voltage is applied to the coil.

A pair of holding flanges 16 projecting outward from the shield case 12 are integrally formed at diametrically symmetrical positions on the peripheral edge of the coil bobbin 13. The holding flange 16 is provided with through holes (not shown) for inserting and inserting the four pin terminals 20, and the tip end portion 20A side of the pin terminals 20 from the lower opening side of the through holes toward the upper opening side. Has been inserted.

Further, the lead wire 20 of the cross coil is entangled and soldered to the pin terminal 20. On the other hand, on the movement mounting surface 25A of the HPC board 25, which is a wiring board, at four positions corresponding to the four pin terminals 20 of the movement 11, four coil springs functioning as connection terminals of the present invention are formed. A female side connection terminal 26 is provided.

Here, the female-side connecting terminal 26 will be described with reference to FIGS. Female side connection terminal 26
As shown in FIG. 2, the HPC has a terminal main body portion 26A having a substantially trumpet-shaped cross section and a hook shape so that the pin terminal 20 can be easily inserted and the assembly process can be simplified.
It is provided with a mounting portion 26B for mounting on the substrate 25.

Terminal body portion 26A of female side connection terminal 26
Includes an opening 28 for inserting the pin terminal 20 and an insertion portion 29 communicating with the opening 28.
The attachment portion 26B of the female-side connection terminal 26 is provided on the HPC board 25.
Is inserted into the mounting opening 25B provided in the mounting area 25B, is brazed and fixed by solder 27 to the wiring pattern 25C provided on the surface opposite to the movement mounting surface 25A, and is electrically connected. Has been done.

As shown in FIG. 3 (a), the movement 1
The pin terminal 20 of No. 1 is inserted into the insertion portion 29 through the opening 28 of the female-side connecting terminal 26 in the direction of the arrow X, and the pin terminal 2
The tip portion of 0 comes into contact with the inner surface side of the female-side connecting terminal 26. When the tip portion of the pin terminal 20 is in contact with the inner surface side of the female-side connecting terminal 26 and the pin terminal 20 is further pressed in the X direction, the inner diameter of the terminal body portion 26A becomes
It becomes larger (expands in diameter) in the direction indicated by the arrow Y in FIG. 9B (direction substantially perpendicular to the insertion direction).

That is, the inner surface of the terminal main body portion 26A of the female-side connecting terminal 26 is expanded while maintaining the contact state. Therefore, the female-side connection terminal 26 can secure a predetermined contact pressure (contact pressure) with the pin terminal 20 and maintain a good electrical connection state.

FIG. 4 is an external perspective view of the movement of the cross coil type indicator and the wiring board after assembly. As shown in FIG. 4, the movement 11 has a good electrical connection state and is stably held on the HPC board 25.
In this case, since the female-side connecting terminal 26 also functions as a shock absorber, it is suitable to use a cross-coil type indicating instrument for vehicle mounting.

By the way, even if the pin terminal 20 is tilted by θ with respect to the insertion direction X as shown in FIG. 5, the female-side connecting terminal 26 is bent according to the tilt θ. The female-side connection terminal 26 can secure a predetermined contact pressure (contact pressure) with the pin terminal 20 and can maintain a good electrical connection state.

Furthermore, the female-side connecting terminal 26 relieves the stress applied by bending and is less likely to cause stress concentration.
The electrical connection state can be maintained well. Also,
The female-side connecting terminal 26 can also be deformed by changing the inner diameter of the insertion portion 29 according to the shape of the pin terminal 20, so that it is possible to adapt to dimensional deviation due to ambient temperature or the like that occurs after assembly. .

As described above, according to the first embodiment, it is possible to easily adapt to the positional deviation between terminals, the dimensional deviation of terminals, etc., and to relieve the stress associated with terminal connection.
It is possible to maintain the electrical connection state well, reduce the influence of mechanical vibration, etc., and improve the reliability. Second Embodiment In the first embodiment, the female-side connection terminal formed of the coil spring is provided on the HPC board side, but in the second embodiment, the female-side connection terminal is provided on the movement side. It is an embodiment of.

FIG. 6 is an external perspective view showing the movement of the cross coil type indicator of the second embodiment and the wiring board during assembly. The indicating instrument movement 31 has a cylindrical shield case 32 having an open upper end, and the coil bobbin 3 is provided inside the shield case 32.
3 are accommodated.

A conductor R is wound around the coil bobbin 33 so that the two coils are orthogonal to each other, and
A rotary shaft 34 attached to the center of a disk-shaped magnet rotor (not shown) is rotatably arranged, and a pointer (not shown) is attached to the tip of the rotary shaft 34. Further, a spiral spring 35 for zeroing is attached to the rotary shaft 34 for returning a pointer (not shown) to the zero position when no voltage is applied to the coil.

Further, a pair of holding flanges 36 projecting outward from the shield case 32 are integrally formed at diametrically symmetrical positions on the peripheral edge of the coil bobbin 33. The holding flange 36 is provided with a through hole (not shown) for inserting and inserting the four pin terminals 40, and the tip portion 40A side of the pin terminal 40 from the lower opening side of the through hole toward the upper opening side. Has been inserted.

Further, at the tip portion 40A of the pin terminal 40,
The conducting wire R of the crossing coil is entangled and soldered.
On the base side of the pin terminal 40, four female side connecting terminals 41 formed by a coil spring functioning as a connecting terminal of the present invention are brazed to the tip portion 40A side of the pin terminal 40 by soldering or the like, and electrically. It is provided in a connected state.

On the other hand, four round pin terminals 46 are provided on the movement mounting surface 45A of the HPC board 45, which is a wiring board, at positions corresponding to the four female-side connection terminals 41 of the movement 31. . Here, the operation at the time of assembly will be described.

When the opening of the female-side connecting terminal 41 of the movement 31 is fitted in the round pin terminal 46 in the direction of arrow X, the tip of the round-pin terminal 46 comes into contact with the inner surface of the female-side connecting terminal 41. . When the movement pin 31 is further pressed in the X direction with the tip portion of the round pin terminal 46 in contact with the inner surface side of the female-side connecting terminal 41, the inner diameter of the terminal main body portion of the female-side connecting terminal increases (diameter expansion). To).

That is, the inner surface of the terminal body of the female-side connecting terminal 41 is expanded while maintaining the contact state. Therefore, the female side connection terminal 41 is the round pin terminal 46.
It is possible to secure a predetermined contact pressure (contact pressure) with respect to and to maintain a good electrical connection state.

FIG. 7 is an external perspective view of the movement of the cross coil type indicator and the wiring board after assembly. As shown in FIG. 7, the movement 31 is in a good electrical connection state and can be stably held on the HPC substrate 45.
In this case, since the female-side connection terminal 41 also functions as a shock absorber, it is suitable to use a cross-coil type indicating instrument for vehicle mounting. Even in this case, even if the round pin terminal 46 is tilted by a predetermined angle with respect to the insertion direction X, the female-side connection terminal 41 will bend in accordance with the predetermined angle, and the female-side connection terminal 41.
Can secure a predetermined contact pressure (contact pressure) to the round pin terminal 46 and maintain a good electrical connection state.

Further, the female-side connecting terminal 41 relaxes the stress applied by bending and reduces the occurrence of stress concentration.
The electrical connection state can be maintained well. Furthermore, the influence of external mechanical vibration can be reduced.
Also, depending on the shape of the round pin terminal 46, the female-side connection terminal 4
Since No. 1 can also be deformed by changing the inner diameter of the insertion portion, it is possible to adapt to dimensional deviation due to ambient temperature or the like that occurs after assembly.

As described above, according to the second embodiment, it is possible to easily adapt to the positional deviation between terminals, the dimensional deviation of terminals, etc., and to relieve the stress associated with terminal connection.
The electrical connection state can be maintained well, and the reliability can be improved.

[0041]

According to the first aspect of the present invention, the connecting means maintains the contact state with the connected terminal while inserting the connected terminal into the insertion portion through the opening, and inserts the connecting direction. By expanding the diameter in the direction perpendicular to and bending in the direction that relieves the stress generated by the insertion of the connected terminal, the electrical connection can be reliably held and mechanical vibration, etc. can be applied. However, the connection state can be maintained and reliability can be improved.

According to the second aspect of the invention, in addition to the function of the first aspect of the invention, since the insertion portion has a substantially trumpet shape in cross section, the connected terminal can be easily inserted.
Assembling work can be simplified. According to the invention described in claim 3, in addition to the action of the invention described in claim 1 or claim 2, since the connecting means is constituted by a coil spring in which a steel wire is formed into a coil shape, it has a simple structure. While maintaining the electrically connected state, the stress associated with the insertion of the connected terminal can be easily bent and relieved, and the reliability can be improved.

According to a fourth aspect of the invention, the movement has the connection terminal according to any one of the first to third aspects, and the connected terminal corresponding to the connection terminal is provided on the wiring board. Since it is arranged, when attaching the movement to the wiring board, the connection terminal expands in the direction perpendicular to the insertion direction while maintaining the contact state with the connected terminal and bends due to the insertion of the connected terminal, The generated stress can be relieved, the electrical connection can be surely maintained, and the connection state can be maintained even when mechanical vibration or the like is applied, so that the reliability can be improved.

According to the invention of claim 5, the connection terminal according to any one of claims 1 to 3 is arranged on the wiring board, and the movement is connected to the connection terminal corresponding to the connection terminal. Since it has a terminal, when mounting the movement on the wiring board, the connection terminal expands in the direction perpendicular to the insertion direction while maintaining the contact state with the connected terminal, and it bends due to the insertion of the connected terminal. It is possible to relieve the applied stress and reliably maintain the electrical connection, and it is possible to maintain the connected state even when mechanical vibration or the like is applied, thereby improving reliability.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a first embodiment during assembly.

FIG. 2 is a cross-sectional view of a female-side connection terminal.

FIG. 3 is an operation explanatory diagram when assembling the female-side connection terminal and the pin terminal.

FIG. 4 is an external perspective view of the first embodiment after assembly.

FIG. 5 is an explanatory view of a fitted state of the female-side connection terminal when the pin terminal is inclined.

FIG. 6 is an external perspective view of the second embodiment during assembly.

FIG. 7 is an external perspective view of the second embodiment after assembly.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 11, 31 Movement 12, 32 Shield Case 13, 33 Coil Bobbin 14, 34 Rotating Shaft 15, 35 Whirlpool Spring 16, 36 Holding Flange 20, 40 Pin Terminal 20A, 40A Tip 25, 45 HPC Board 25A, 45A Movement Placement Surface 26, 41 Female-side connection terminal 26A Terminal body portion 26B Mounting portion 46 Round pin terminal R Conductor wire

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area H01R 4/48 H01R 4/48 C

Claims (5)

[Claims] 1. When one end is fixed and has an opening portion provided on the other end side and an insertion portion continuous with the opening portion, when a connected terminal is inserted into the insertion portion through the opening portion,
A connecting means capable of expanding the diameter in a direction perpendicular to the insertion direction while maintaining a contact state with the connected terminal and bending in a direction for relaxing stress generated by the insertion of the connected terminal. A connection terminal characterized by being provided. 2. The connection terminal according to claim 1, wherein the insertion portion has a substantially trumpet shape in cross section. 3. The connection terminal according to claim 1 or 2, wherein the connection means is constituted by a coil spring formed of a steel wire in a coil shape. 4. An indicator instrument comprising a movement and a wiring board mounted in a state where the movement is electrically connected, wherein the movement is the connection terminal according to any one of claims 1 to 3. An indicating instrument characterized in that a connected terminal corresponding to the connecting terminal is arranged on the wiring board. 5. An indicating instrument comprising a movement and a wiring board mounted in a state in which the movement is electrically connected, wherein the wiring board has any one of claims 1 to 3. And a connection terminal corresponding to the connection terminal, the indicating instrument.