JPH0668323U - Contact terminal - Google Patents

Abstract

(57) [Summary] [Structure] The tip of the main body 1 is placed on a flat surface.
A contact needle 5 protruding from the lower surface is provided, and when the main body 1 is placed on the circuit board, the contact needle 5 is pressed against the pad surface by the spring means or the weight of the main body 1 to maintain the contact. [Effect] When measuring the electrical state of the pads of the circuit board, it is not necessary to hold the contact terminals by hand, and only by placing them on the circuit board, reliable contact between the contact needles 5 and the pads can be achieved. Is obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a contact terminal for contacting an electric component to measure various electrical states, and more particularly to a contact terminal suitable for measuring a pad of an electronic circuit board.

[0002]

[Prior art]

 Conventionally, as this type of contact terminal, like a terminal of a tester, a contact needle is made to protrude from the tip of a pen-shaped holder, and the holder is held in the hand to contact the contact needle with a desired measurement location.

[0003]

[Problems to be solved by the device]

 However, in this case, in order to maintain the contact of the contact needle, the holder had to be held still. If the measurement takes a long time, the holder must be held in the hand and kept pressed against the measurement point during that time, and even a slight movement may cause momentary contact failure, resulting in incorrect measurement results. It was not small.

Further, a hook terminal for measuring a live wire and a crocodile terminal for sandwiching and fixing a measurement location are known, but they are not suitable for measuring a pad of an electronic circuit board as described above. there were.

The present invention has been made in view of the above circumstances, and it is possible to place the contact needle on the measurement location with a predetermined force simply by placing the contact needle on the electronic circuit board in a state of being in contact with the measurement location. It is an object of the present invention to provide a contact terminal that can be pressed and maintain continuity.

[0006]

According to the first aspect of the present invention, a main body placed on a plane and a base fixedly supported to the main body and electrically connected to a measuring instrument. Connected to the support, spring means for elastically moving the tip of the support, and a contact needle protruding downward from the tip of the support, the tip slightly protruding from the lower surface of the main body. It is characterized in that the support portion is provided against the elasticity of the support portion by pressing the tip of the contact needle.

A second invention is that a main body placed on a flat surface and a main body fixedly supported to the main body and electrically connected to a measuring instrument, the tip of which is the lower surface of the main body. It is characterized in that it comprises a contact needle protruding slightly more, and a part of the weight of the main body is applied to the contact needle when the main body is placed on a flat surface.

[0008]

【Example】

 1 and 2 show an embodiment of the first device of the present invention. Reference numeral 1 is a main body, and a protruding portion 2 is formed at the tip thereof.

Reference numeral 3 denotes a metal needle having spring elasticity, and the metal needle 3 is formed by a support portion 4 extending in the front-back direction in the main body 1 and a contact formed by being bent downward at the tip of the support portion 4. It consists of a needle 5.

The support part 4 is connected to the tip of a cable 6 connected to a measuring instrument at the base part 4 a at the rear end thereof, and the connection part is fixed with an insulating resin 7 and fixed to the main body 1. Supported by.

The supporting portion 4 is supported in a cantilever state by the fixing portion made of the resin 7, extends horizontally in the body 1 and is bent downward at the tip of the protruding portion 2 to form the contact needle 5. ing.

The tip of the contact needle 5 projects slightly downward from the lower surface of the main body 1, and by placing the main body 1 on a plane, the tip of the contact needle 5 abuts on the plane and the weight of the body 1 is reduced. Depending on the amount, the supporting part 4 is bent upward as shown by the chain line in FIG. 2 against its elastic force, and the elastic force of the supporting part 4 presses the tip of the contact needle 5 against the flat surface with a predetermined force. ing.

Reference numeral 8 denotes a non-slip leg 8 made of an insulating material such as rubber and fixed to the four corners of the lower surface of the main body 1. When the main body 1 is placed on a flat surface, the non-slip leg 8 It is supposed to be supported.

FIG. 3 shows another embodiment of the present invention, in which the supporting portion 4 is made of a metal plate having spring elasticity, and the contact needle 5 is implanted on the lower surface of the tip thereof. The base portion 4a of the supporting portion 4 is fixedly attached to the insulating member 10 fixed to the main body 1 by the screw 9 together with the cable 6.

FIG. 4 shows another embodiment of the present invention, in which an elastic member 11 such as a sponge is interposed between the upper surface of the support portion 4 and the inner surface of the protrusion 2 at the tip portion of the support portion 4. The contact needle 5 is pressed downward by the elastic force of the member 11.

5 and 6 show an embodiment of the second invention of the present invention. In this embodiment, the metal needle 3 and the cable 6 are connected in the main body 1 and hardened with the resin 7.

The tip of the metal needle 3 protrudes from the tip of the main body 1 and forms a contact needle 5 that is bent downward and slightly protrudes from the lower surface of the main body 1.

On the lower surface of the main body 1, anti-slip legs 8 are attached only to both sides of its rear end. When the main body 1 is placed on a flat surface, the anti-slip legs 8 and the contact needle 5 are The main body 1 is supported by the tip, and part of the weight of the main body 1 is applied to the contact needle 5 and pressed against the flat surface.

In each of the above embodiments, the contact needle 5 and the main body 1 are insulated with the resin 7 or the insulating member 10, and the non-slip leg 8 is provided between the main body 1 and the plane on which it is placed. It is insulated, but depending on the electrical condition of the pad and its measurement purpose, either of these insulation means may be used alone.

[0020]

[Action]

 When measuring the electrical state of the pad of the electronic circuit board according to the present invention, the main body 1 is placed on the electronic circuit board and the tip of the contact needle 5 is brought into contact with the surface of the pad.

At this time, in the first invention, since the tip of the contact needle 5 projects from the lower surface of the main body 1, the contact needle 5 is pressed by the pad and the elastic force of the spring means such as the support portion 4 or the elastic member 11 is applied. The contact needle 5 is pressed against the pad surface by the elastic force of the spring means.

In the second invention, the main body 1 is placed on an electronic circuit board, and the contact needle 5 is brought into contact with the pad to reduce the weight of the main body 1 from the non-slip legs 8 and the contact needle. 5, the contact needle 5 is pressed against the surface of the pad by causing a part of the weight of the main body 1 to act on the contact needle 5.

The electrical state of the pad is conducted to the measuring instrument through the contact needle 5 and the supporting portion 4 and the cable 6, and the electrical state is measured.

Further, by insulating the contact needle 5 with the resin 7 or the insulating member 10 and the anti-slip leg 8, the electrical state of other pads of the electronic circuit board on which the main body 1 is placed affects the measurement result. There is no.

[0025]

According to the present invention, the main body 1 is placed on the electronic circuit board, and the tip of the contact needle 5 is brought into contact with the surface of the pad to conduct the electrical state of the pad to the measuring instrument. , Can be measured.

Further, since it is not necessary to support it by hand during the measurement and the contact needle 5 is pressed against the pad surface with a predetermined force, the continuity between the pad and the contact needle 5 can be always kept constant. It does not cause poor contact or damage the pad. Further, since the contact needle 5 does not move on the pad surface, the contact state does not change, and accurate measurement results can always be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a first device of the present invention.

FIG. 2 is a central longitudinal sectional view of the embodiment.

FIG. 3 is a central longitudinal sectional view of another embodiment of the first invention.

FIG. 4 is a central longitudinal sectional view of still another embodiment of the first invention.

FIG. 5 is a perspective view showing an embodiment of a second device of the present invention.

FIG. 6 is a central longitudinal sectional view of an embodiment of the second invention.

[Explanation of symbols]

 1 Main Body 4 Supporting Part 4a Base 5 Contact Needle 11 Elastic Member

Claims (2)

[Scope of utility model registration request] 1. A main body (1) placed on a plane and its base (4a) fixedly supported to the main body (1) and electrically connected to a measuring instrument. The support part (4), spring means (4, 11) for elastically moving the tip of the support part (4) upward, and projecting downward from the tip of the support part (4), the tip of which is the above-mentioned. The spring means (4) comprises a contact needle (5) slightly protruding from the lower surface of the main body (1) and presses the tip of the contact needle (5).
A contact terminal, characterized in that the contact needle (5) is pressed downward by the elasticity of 11). 2. A main body (1) placed on a plane, and a main body (1) fixedly supported to the main body (1) and electrically connected to a measuring instrument. ) And a part of the weight of the main body (1) is applied to the contact needle (5) when the main body (1) is placed on a flat surface. Contact terminal characterized by