JP2003332123A - Solenoid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid wherein the loosening or drop-off of a lead wire can be prevented in a terminal block structure needing no solder connection at the user side. <P>SOLUTION: The solenoid is provided with a terminal block 10 that is fixed on one end face of a bobbin 2 wound with a coil winding 1 and a rear cover 20 covering the rear side of the terminal block 10, and it is also provided with, on the rear side of the terminal block 10, grooves 13 and 14 for inserting a lead wire end that are formed from one side edge 10f of a central part 10a side, elastic terminal pieces 11 and 12 that are positioned and housed, and projections 10d and 10e for bending stop for regulating the limitation of elastic bending deformation of the terminal piece from its one end side to the central part side. The terminal piece is provided with tip divided parts 11a and 12a projecting in a roughly transverse direction toward a position facing the insertion groove, on its one end side, as well as connection parts A and B wound by a lead wire 1a from the coil winding, on the other end side. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid used in a solenoid plunger or the like, and more particularly to a terminal block structure for a solenoid.

[0002]

2. Description of the Related Art As shown in FIG. 4, for example, a solenoid used for a solenoid plunger has a collar-shaped terminal block 3 fixed to one end surface of a bobbin 2 formed by winding a coil winding 1, It has a pin terminal 4 planted on the side surface 3 a of the terminal base 3. The lead wire 1a from the coil winding 1 is wound around the side surface 3a of the pin terminal 4 to form a entangled portion (connection portion) 5, which is soldered to the entangled portion 5 to connect the coil winding 1 and the pin terminal 4 to each other. Making a connection. For example, on the user's side, the core wire portion 34 from which the outer cover 32 is removed at the wire end of the lead wire 30 connected to the printed wiring board or the like is applied to the tip portion of the pin terminal 4 for soldering, and the printed wiring board or the like and the solenoid Has achieved the connection.

Further, as another solenoid, as shown in FIG. 5, a collar-shaped terminal block 3 fixed to one end surface of a bobbin 2 formed by winding a coil winding 1, and along this terminal block 3 It has a long pin terminal 7 inserted, and the lead wire 1a from the coil winding wire 1 is wound around the terminal portion 7a in the recess 8 of the one side surface 6a to form a entangled portion (connection portion) 8, and this entanglement The coil winding 1 and the pin terminal 7 are connected by soldering to the portion 8. For example, on the user side,
The female connector 16 at the wire end of the lead wire 30 connected to the printed wiring board or the like is inserted into the concave portion 9 formed as the male connector portion on the other side surface of the terminal block 3, and the printed wiring board and the solenoid are connected. Has achieved a connection with.

[0004]

However, the above solenoid has the following problems.

In the solenoid terminal block structure shown in FIG. 4, in the solder connection of the lead wire 30 on the user side, heat is transferred from the pin terminal 4 to the terminal block 3 due to overheating, and the entangled portion 5 Not only does the solder pile melt and tunnel solder or the like occurs, leading to poor electrical conduction, but also the pin terminals 4 are connected to the terminal block 3.
It causes the problem of loosening from.

On the other hand, in the terminal block structure of the solenoid shown in FIG. 5, the solder connection work on the user side can be eliminated, but since the connector structure is an insertion-extraction type and press-fit connection, for example, under vibration. There is a risk that the female connector 16 may come loose or come off, resulting in poor contact or the like and lacking reliability.

Therefore, in view of the above problems, the first aspect of the present invention
It is an object of the present invention to provide a solenoid that can suppress loosening or disconnection of lead wires and eliminate contact failure in a terminal block structure that does not require soldering work on the user side. A second object of the present invention is to provide a solenoid which can easily pull out a lead wire.

[0008]

In order to solve the above-mentioned problems, a first means of the present invention is a solenoid having a terminal block fixed to one end surface of a bobbin formed by winding a coil winding. In the terminal block, the lead wire terminal insertion space formed from one side edge to the center side, the elastic terminal piece that is positioned and housed, and the elasticity of one end side of the elastic terminal piece toward the center side And a bending stop portion for limiting the bending deformation. The elastic terminal piece has, at the one end side thereof, a cracked portion which extends in a substantially transverse direction to a position facing the lead wire terminal insertion empty portion. In addition, the elastic terminal piece,
The other end has a entwined portion formed by winding a lead wire from the coil winding wire.

In such a terminal block structure, for example, when the lead wire is connected to the solenoid on the user side, when the end of the lead wire is inserted into the empty space for inserting the lead wire terminal,
The terminal slips through the tip of the elastic terminal piece and is sandwiched between them, and the tip cracks the terminal, and even if pulling force is applied to the lead wire, the terminal bites into the tip crack due to the wedge action. Therefore, it is possible to prevent the lead wire from loosening or coming off, and to prevent contact failure. Before inserting the end of the lead wire into the empty space for inserting the lead wire terminal,
In some cases, it is necessary to remove the outer sheath of the lead wire terminal and then apply soldering to the core wire to prevent the core wire from scattering and to add bending rigidity to the core wire. Needless to say, the solder connection work of can be eliminated.

In order to facilitate the insertion of the lead wire and enhance the wedge action by the pulling force, it is desirable that the tip cracked portion is warped to the central portion side.

However, in the above terminal block structure, once the lead wire is inserted into the terminal block, the lead wire can no longer be taken out. Therefore, in order to disassemble and reuse the device, the lead wire is taken out. Also, a structure that can be simplified is required.

Therefore, according to the second means of the present invention, the operation empty portion for passing the operation member which is formed from the one side edge to the central portion side and which is to be elastically bent and deformed from the one end side to the central portion side. It is characterized by having. For example, if you insert an external operating member into the operating space, you can push and bend one end toward the center side up to the bending limit of the bending stop.In this state, the tip crack part is off the core wire part, so this The lead wire can be pulled out while maintaining the state. The operation member may be provided in advance on the back surface side of the terminal block.

Since the terminal block can be integrally formed by resin molding and the elastic terminal piece can be made into a simple substantially U-shape, press working is easy, mass productivity is excellent, and cost reduction can be realized.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a perspective view showing a partial rear view of a back cover of a solenoid according to an embodiment of the present invention.
FIG. 3 is an exploded perspective view showing a state where a coil winding of the solenoid is removed.

The solenoid of this embodiment has a rectangular box-shaped collar-shaped terminal block 10 fixed to one end surface of a bobbin 2 formed by winding a coil winding 1, and a fitting type for covering the back side of the terminal block 10. And a back cover 20.

The back side structure of the collar-shaped terminal block 10 is provided with a thin central portion 10a connected to the bobbin barrel 2a and frame portions 10b and 10c connected to both sides thereof. Thin-walled central part 10
Between the a and the frame portions 10b and 10c, the elastic terminal piece 11,
12 is positioned and stored. The pair of left and right elastic terminal pieces 11 and 12 are arranged to face each other. Frame portion 10b, 1
Lead wire terminal insertion groove portions 13 and 14 are formed on one side edge 10f between the two sides of 0c. The groove portions 13 and 14 for inserting the lead wire terminals are provided from the one side edge 10f to the central portion 10a.
It is formed to the side.

The elastic terminal pieces 11 and 12 have tip cracks 11a and 12a having a substantially V-shaped notch at one end side thereof,
The other ends are narrow portions 11b and 12b. The elastic terminal pieces 11 and 12 are bent into a substantially U shape so that the terminal block 1
Positioned and stored in the 0 as described above, the cracked portion 11
Reference characters a and 12a extend substantially transversely to the positions facing the lead wire terminal insertion groove portions 13 and 14, respectively. Also, the cracked portion 1
As shown in FIG. 3, 1a and 12a are curved toward the central portion 10a. As shown in FIG. 3, the terminal block 10 has a central portion 10a on one side of the elastic terminal pieces 11 and 12 on the back surface side.
Bending stop projections 10d and 10e for limiting elastic flexural deformation to the side are provided. One side edge 10 of the terminal block 10
At the other side edge facing f, a recess 15 is formed for folding and storing the entwined portions A and B formed by winding the lead wire 1a from the coil winding 1 around the narrow width portions 11b and 12b.

At one side edge 10f of the terminal block 10, one end side of the elastic terminal pieces 11, 12 is inserted into the operation groove 16, 1 for inserting the pin member P to be elastically bent and deformed toward the central portion 10a.
7 are formed. The operation grooves 16 and 17 are adjacent to the outer sides of the lead wire terminal insertion groove portions 13 and 14, and
It is formed from one side edge 10f to the central portion 10a side.

As shown in FIG. 3A, the lead wire 1a from the coil winding wire 1 is wound around the narrow portions 11b and 12b of the elastic terminal pieces 11 and 12 and then soldered to form the narrow portion 11b, 12b is bent and stored in the recess 15. Then, the back cover 20 is fitted on the back of the terminal block 10.

In such a terminal block structure, for example, when connecting the lead wires 30a and 30b to the solenoid on the user side, as shown in FIG.
After removing the outer cover 32 of the terminal and soldering the core wire portion 34 to prevent the core wire portion from scattering, the core wire portion 34 having a solid bending rigidity is attached to the lead wire terminal insertion groove portion 13. When inserted, the core wire portion slips through the tip cracked portion 11a of the elastic terminal piece 11 and is pinched, and the tip cracked portion 11a holds the core wire portion 34, and the lead wire 3
Even if a pulling force is applied to 0a, the core wire portion bites into the tip cracked portion 11a by the wedge action due to the elastic restoring force, so that the lead wire 30a can be prevented from loosening or coming off, and contact failure can be eliminated. . In particular, since the cracked portion 11a is warped toward the central portion 10a, the lead wire can be easily inserted and the wedge action can be enhanced. It goes without saying that the solder connection work on the user side can be eliminated.

Then, as shown in FIG. 3 (c), when the lead wire 30b is pulled out, the pin-shaped member P is inserted into the operation groove portion 17 and the one end side of the elastic terminal piece 11 is bent to prevent it from bending. Since it is possible to push and bend to the central portion 10a side up to the bending limit due to
Is separated from the core wire portion 34, the lead wire 30b can be pulled out while maintaining this state. For this reason, the lead wire can be easily extracted, and the device can be easily disassembled and reused. In addition, the elastic terminal piece 11,
Since 12 is a simple substantially U-shape, it can be easily pressed, is excellent in mass productivity, and can be manufactured at low cost.

[0022]

As described above, the present invention has the following effects.

(1) When the end of the lead wire is inserted into the empty space for inserting the lead wire end, the end of the lead wire slips through the cracked portion of the elastic terminal piece and is pinched by the cracked portion, and the cracked portion is in a state of holding the terminal. Even when a pulling force is applied to the lead wire, the terminal bites into the cracked portion due to the wedge action, so that the lead wire can be prevented from loosening or coming off and contact failure can be eliminated. Before inserting the end of the lead wire into the empty space for inserting the lead wire end, remove the outer cover of the lead wire end and then apply soldering treatment to the core wire part to prevent the core wire part from scattering and attach it to the core wire part. In some cases, it is necessary to add bending rigidity, but it goes without saying that solder connection work on the user side can be eliminated.

(2) Since the tip crack portion is warped toward the central portion, it is possible to enhance the wedge action by the pulling force while facilitating the insertion of the lead wire.

(3) Since the operation empty portion is formed, one end side can be pushed and bent by the operation member toward the central portion side up to the bending limit by the bending stop portion. In this state, the tip cracked part from the terminal is slightly Since it is detached, the lead wire can be pulled out while maintaining this state.

(4) Since the elastic terminal piece has a simple substantially U-shape, it can be easily pressed, is excellent in mass productivity, and can be manufactured at a low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a back cover of a solenoid according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state where a coil winding of the solenoid is removed.

FIG. 3 (a) is a bottom view showing a state in which a lead wire of a coil winding is wound around the other end side of the elastic terminal piece of the solenoid, and FIG. 3 (b) shows a state in which one lead wire is connected to the solenoid. The bottom view shown, (c) is a bottom view showing an operation mode when extracting the lead wire connected to the solenoid.

FIG. 4 is a vertical cross-sectional view showing a conventional example of a solenoid.

FIG. 5 is a vertical sectional view showing another conventional example of a solenoid.

[Explanation of symbols]

1 ... Coil winding 1a ... Leader line 2 ... Bobbin 2a ... Bobbin barrel 10 ... Trim-shaped terminal block 10a ... thin-walled central part 10b, 10c ... Frame portion 10d, 10e ... Bending stop projections 10f ... One side edge 11, 12 ... Resilient terminal pieces 11a, 12a ... Tip cracked portion 11b, 12b ... narrow portion 13, 14 ... Lead wire end insertion groove 15 ... Recess 16, 17 ... Operation groove 20 ... Fit back cover 30a, 30b ... Lead wire 32 ... Skin 34 ... Core wire portion A, B ... Entangled part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiichi Asama             1771 Nakamaruko, Maruko-cho, Ogo-gun, Nagano Sanyo             Precision Co., Ltd. F-term (reference) 5E048 AC01 CB02

Claims (4)

[Claims] 1. A solenoid having a terminal block fixed to one end surface of a bobbin formed by winding a coil winding, wherein a lead wire terminal is formed from one side edge of the terminal block to a central portion side. It has a space for insertion, an elastic terminal piece that is positioned and housed, and a bending stop portion for limiting elastic bending deformation of one end side of the elastic terminal piece toward the central portion side. The elastic terminal piece has a cracked portion formed on the one end side, which extends substantially transversely to a position facing the lead wire terminal insertion empty portion, and has a lead wire wound from the coil winding wire. A solenoid having a barbed portion on the other end side. 2. The solenoid according to claim 1, wherein the cracked portion is curved toward the central portion. 3. The operation member according to claim 1, wherein the operation member is formed from one side edge of the terminal block to the central portion side, and the one end side is to be elastically bent and deformed toward the central portion side. A solenoid having an empty space for operation. 4. The solenoid according to claim 1, wherein the elastic terminal piece is substantially U-shaped.