JPH0513115A - Spring connector - Google Patents

Abstract

PURPOSE:To provide an L-shaped or straight type spring connector having an assembling structure easy to improve product yield and productivity. CONSTITUTION:A spring connector 1 has a housing 3 in which first and second receiving parts 4, 5 communicating each other are formed on one end side and the other end side, a fixed resistor 2 and a coil spring 7 which are received in the first receiving part 4, and a connecting metal fitting and a lead 9 connected to its other end side which are received in the second receiving part 5. A first lead terminal 2a drawn from one end side of the fixed resistor 2 is turned up toward the other end side along a resistor body 2b. The base end part 7a of the coil spring 7 is pressed and fitted onto the first lead terminal 2a and the resistor body 2b. A second lead terminal 2c drawn from the other end side of the fixed resistor 2 is nipped by a leaf spring piece 10 provided on one end side of the connecting metal fitting 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring connector called a built-in resistor type, and more particularly to an assembly structure thereof.

[0002]

2. Description of the Related Art Conventionally, when a high voltage circuit is constructed, a spring connector containing a fixed resistor is used, and an example of this type of spring connector is shown in FIG. An L-shaped spring connector 20 having a cross-sectional structure is known. That is, the L-shaped spring connector 20 is made of a fixed resistor 21 having a predetermined resistance value and an L-shaped insulating resin in a side view in which various necessary components including the fixed resistor 21 are integrally housed by insert molding. And a housing 22. Further, reference numeral 23 in this figure is a coil spring housed inside the one end that is positioned on the front side (left side in the figure) of the housing 22 and is in a standing shape, and 24 is a cylindrical metal plate processed into a cylindrical shape. It is a formed connection terminal, and the base end portion 23 a of the coil spring 23 is externally fitted and soldered to the connection terminal 24.

A tongue piece 24a is pulled out from the lower end of the connecting terminal 24, and the tongue piece 24a is bent along the other end side located on the rear side (right side in the figure) of the housing 22. A first lead terminal 21a drawn from one end of the fixed resistor 21 is connected to the tip by soldering or the like. Furthermore, an insulating coated lead wire 25 is housed inside the other end of the housing 22, and the core wire 25a and the second lead terminal 21b drawn from the other end of the fixed resistor 21 are separated from each other. They are fixed to each other via crimp fittings 26. Although FIG. 4 shows a schematic configuration of the L-shaped spring connector 20, there is also a spring connector (not shown) called a straight type in which the side view shape is not bent and formed. The general structure is not so different.

[0004]

By the way, in manufacturing the spring connector 20 having the conventional structure,
After connecting various components such as the fixed resistor 21 by fixing means such as soldering, these are arranged at predetermined positions in a resin molding die (not shown) and then an insulating resin is injected. By doing so, the housing 22 is formed. However, during this insert molding operation, the action of the flow of the insulating resin is applied to various parts, so it is possible to position and support the various parts placed in the mold as they are. As a result, these parts are misaligned and the required resin thickness cannot be secured, and sometimes the fixed resistor 21, the connection terminal 24, etc.
In some cases, it may be exposed from the outer surface of No. 2, resulting in a decrease in product yield.

Further, since this insert molding work is performed while dragging the lead wire 25 which is prepared and attached for a required length in advance, a measure for preventing looseness of the lead wire 25 is taken beforehand by manual work. Since it is necessary, it is difficult to automate this work to improve productivity.

The present invention was devised in view of such inconvenience, and provides an L-type or straight-type spring connector having an assembly structure that facilitates improvement of product yield and productivity. The purpose is to do.

[0007]

In the spring connector according to the present invention, in order to achieve such an object, first and second accommodating portions communicating with each other are formed inside one end side and the other end side, respectively. A housing made of insulating resin, a fixed resistor and a coil spring housed in the first housing part, a connection fitting housed in the second housing part, and a lead wire connected to the other end side, The first lead terminal pulled out from one end side of the fixed resistor is folded back toward the other end side along the resistor body, and the folded first lead terminal and the resistor body are provided with a base end portion of a coil spring. While press-fitting and externally fitting, the second lead terminal pulled out from the other end side of the fixed resistor is sandwiched by a leaf spring piece provided on one end side of the connection fitting.

[0008]

According to the above construction, the fixed resistor having the coil spring fitted therein and the connecting fitting to which the lead wire is connected are simply inserted into the housing formed in advance as a single component and mounted. The spring connector will be completed by the following procedure. The coil spring, the lead terminal of the fixed resistor, and the connecting metal fitting housed in this housing are electrically connected to each other not by a fixing means such as soldering but by a press-fitting and elastic holding means. It means that it is connected to.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIG. 1 is a side sectional structural view showing an assembled state of an L-shaped spring connector according to a first embodiment of the present invention, and FIG. 2 is a line A- in FIG.
FIG. 2 is a cross-sectional structural view of a main part taken along line A, in which reference numeral 1 indicates an L-shaped spring connector called a built-in resistor type, and 2 indicates a fixed resistor with a lead terminal.

This spring connector 1 is provided with a housing 3 which is L-shaped in side view and which is formed as a single component by resin molding using an insulating resin such as PPC or epoxy resin. Then, a first storage portion 4 having a predetermined cross-sectional shape is formed inside the one end which is located on the front side (left side in the figure) of the housing 3 and has a rising shape, and the rear side (in the figure, A second storage portion 5 having a shape corresponding to the necessary components to be stored is also formed inside the other end located on the right side), and both storage portions 4 and 5 communicate with each other through the through hole 6. Has been made.

A fixed resistor 2 having a predetermined resistance value and a coil spring 7 having a predetermined shape are housed in a first housing portion 4 formed at one end of the housing 3. The first lead terminal 2a pulled out from one end side (upper side in the figure) of the fixed resistor 2 is folded back toward the other end side (lower side in the figure) along the resistor body 2b. A base end portion 7a of the coil spring 7 is press-fitted around the folded first lead terminal 2a and the resistor body 2b. The second lead terminal 2c drawn from the other end side of the fixed resistor 2 is inserted into the through hole 6 and then protrudes into the second housing portion 5 formed on the other end side of the housing 3. ..

Further, a connecting fitting 8 formed by bending a metal plate is housed in the second housing portion 5, and the other end located on the rear side of the connecting fitting 8 is on the other side. The core wire 9a of the lead wire 9 that has been insulation-coated is connected by a fixing means such as pressure bonding. Further, a leaf spring piece 10 configured to be elastically deformable so as to sandwich the second lead terminal 2c of the fixed resistor 2 is provided on one end side located on the front side of the connection fitting 8, and this leaf spring piece is provided. The inner surface 5a of the second storage portion 5 facing the inner surface 10 is formed so as to project inward so as to press the second lead terminal 2c toward the leaf spring piece 10. Reference numeral 8a in FIG. 2 is a locking piece cut and raised to prevent the housing 3 from coming off.

By the way, this L-shaped spring connector 1
Will be assembled according to the following procedure.

First, the first lead terminal 2a of the fixed resistor 2
After being folded back along the resistor body 2b, the base end portion 7a of the coil spring 7 is press-fitted and fitted around the folded first lead terminal 2a and resistor body 2b. Then, the fixed resistor 2 to which the coil spring 7 is fitted is held downward, and the second lead terminal 2c is held.
Is inserted into the first storage part 4 of the housing 3 while being inserted through the through hole 6, and is stored therein. Next, the connection fitting 8 to which the core wire 9a of the lead wire 9 is connected is inserted from the side of the leaf spring piece 10 provided at one end thereof toward the inner back side of the second storage portion 5. Then, this second storage part 5
The second lead terminal 2 of the fixed resistor 2 which protruded into the inside
c will be clamped between the projecting inner surface 5a of the second storage part 5 and the leaf spring piece 10, and at the time when this is completely clamped, the connection fitting 8 is stored in the second storage part 5. The spring connector 1 is completed.

Second Embodiment FIG. 3 is a side sectional structural view showing an assembled state of a straight type spring connector according to a second embodiment of the present invention. Reference numeral 11 shows a spring connector of a built-in resistor type. Since the basic schematic configuration of the straight type spring connector 11 is not different from that of the L type spring connector 1, parts or portions which are the same as or equivalent to those in FIGS. 1 and 2 are denoted by the same reference numerals. ing.

This spring connector 11 is provided with a bar-shaped housing 12 in side view formed as a single component made of an insulating resin, and is formed inside one end located on the front side (left side in the figure) of the housing 12. The 1st storage part 4 and the 2nd storage part 5 formed inside the other end side located in the rear side (right side in a figure) are mutually connected.
A fixed resistor 2 having a predetermined resistance value and a coil spring 7 having a predetermined shape are stored in the first storage portion 4, and one end side of the fixed resistor 2 (left side in the figure). ), The first lead terminal 2a is folded back toward the other end side (right side in the figure) along the resistor body 2b. Moreover, this folded back first
A base end portion 7a of the coil spring 7 is externally fitted around the lead terminal 2a and the resistor body 2b by press fitting. At this time, the second lead terminal 2c pulled out from the other end side of the fixed resistor 2 projects into the second housing portion 5 formed at the other end side of the housing 12.

On the other hand, a connection fitting 13 formed by bending a metal plate is accommodated in the second storage portion 5, and the other end located behind the connection fitting 13 is on the other side. The core wire 9a of the lead wire 9 that has been insulation-coated is connected by a fixing means such as pressure bonding. Then, on one end side located on the front side of the connection fitting 13, a leaf spring piece 14 configured to be elastically deformable and a receiving fitting 1 facing the leaf spring piece 14 are provided.
5 are provided, and these are integrally formed with the connection fitting 13. Further, a second lead terminal 2b, which is pulled out from the rear end side of the fixed resistor 2 and protrudes into the second housing portion 5, is inserted and crimped between the leaf spring piece 14 and the receiving metal piece 15. .. The connection fitting 13 is also provided with a cut-out locking piece 13a,
The engagement piece 13a and the receiving metal fitting 15 engage with the positioning step portions provided at predetermined positions in the second storage portion 5, whereby the connection metal fitting 13 is positioned.

By the way, the procedure for assembling the spring connector 11 is basically the same as the procedure for assembling the L-shaped spring connector 1 according to the first embodiment, and therefore the description thereof is omitted here.

[0020]

As described above, according to the spring connector of the present invention, the first and second storage portions communicate with each other inside the housing formed as a single component for storing various necessary components. The spring connector is completed by a simple procedure of inserting the fixed resistor to which the coil spring is fitted and the connecting metal fitting to which the lead wire is connected into the corresponding storage parts and mounting them. become. Therefore, as in the conventional example, after the various necessary parts are pre-connected by the fixing means using soldering or crimping terminals, it is not necessary to form the housing by insert-molding an insulating resin around them, as a result, Various inconveniences associated with this insert molding will be eliminated, and the effect of easily improving the product yield and productivity can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional structural view showing an assembled state of an L-shaped spring connector according to a first embodiment of the present invention.

2 is a cross-sectional structural view of a main part taken along the line AA of FIG.

FIG. 3 is a side sectional structural view showing an assembled state of a straight type spring connector according to a second embodiment of the present invention.

FIG. 4 is a side sectional structural view showing an L-shaped spring connector according to a conventional example.

[Explanation of symbols]

 1 L-type spring connector 2 Fixed resistor 2a 1st lead terminal 2b Resistor body 2c 2nd lead terminal 3 Housing 4 1st accommodating part 5 2nd accommodating part 7 Coil spring 7a Base end part 8 Connection metal fitting 9 Lead wire 10 Plate Spring piece

Claims (1)

Claims: What is claimed is: 1. A housing (3) made of an insulating resin, wherein first and second accommodating portions (4, 5) communicating with each other are formed inside the one end side and the other end side, respectively. It is connected to the fixed resistor (2) and the coil spring (7) housed in the first housing part (4), the connection fitting (8) housed in the second housing part (5) and the other end side. Lead wire (9)
The first lead terminal (2a) drawn from one end side of the fixed resistor (2) is folded back toward the other end side along the resistor body (2b), and this folded back While the base end portion (7a) of the coil spring (7) was press-fitted onto the first lead terminal (2a) and the resistor body (2b) to be externally fitted, it was pulled out from the other end side of the fixed resistor (2). A spring connector, characterized in that the second lead terminal (2c) is sandwiched by a leaf spring piece (10) provided on one end side of the connection fitting (8).