JP3560365B2 - Multi-stage pin switch - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a multi-stage pin switch, and more particularly, to a multi-stage pin switch that can be mainly used for inspection of a terminal attachment state of a connector of an electronic device.
[0002]
[Prior art]
2. Description of the Related Art When connecting various electronic devices with a plurality of electric wires, it has been conventionally performed to collectively connect a plurality of electric wires by a connector connected to a harness (assembled electric wire). The terminal 1 attached to this connector is usually one having one or two projecting lances 1b attached to the body of a thin male or female pin, as shown in FIG. The wire 2 is attached by crimping terminal 1c (or soldering) to the connector 2 (A in FIG. 6), and press-fitted into the attachment hole 1e of the connector housing 1d (B in FIG. 6). The lance 1b is attached at an angle as shown in the figure, and once pressed into the mounting hole 1e, the lance 1b is attached to the wall surface of the mounting hole 1e as shown in the enlarged view of FIG. 6B. Because of the crimping, the terminal 1 cannot return.
[0003]
By the way, if the terminal is not attached to a proper position with respect to the housing, or if it is not attached with sufficient strength, when the connectors are connected, the male / female connection is not sufficiently performed, resulting in poor contact from the beginning. Or, a problem such as loosening of the connection due to vibration during use and poor contact may occur. Therefore, inspection of the attachment state of the terminal has been conventionally performed. However, as described above, a plurality of terminals are attached to one connector, and inspecting each terminal of a mass-produced connector one by one requires a great deal of labor. Vessels have been developed.
[0004]
For example, Japanese Patent Publication No. 4-40669 discloses that a pin-shaped probe having a specification corresponding to a plug of a connector is attached in a push-out direction with a return spring, and a contact is provided behind the probe so that when the probe is pushed back and hits the contact, the probe becomes conductive. An inspection instrument is disclosed which is formed and has such an inspection switch arranged at a position where the terminal of the connector is attached.
[0005]
[Problems to be solved by the invention]
By the way, some of the connectors have specifications in which the terminal mounting depth is different. Therefore, conventionally, it was necessary to prepare an inspection device for each connector having different specifications. In addition, when terminals of different specifications are mixed and attached to one connector, a different inspection device must be used for one connector for each specification. Therefore, the conventional connector inspection has a problem that the inspection efficiency is low and the inspection cost is high.
[0006]
The present invention has been made in view of the above problems, and in a pin switch in which a switch is turned on when a pin attached to and retracted from a casing retreats, a multi-stage pin that can be turned on and off at a plurality of positions is provided. It is intended to provide a switch.
[0007]
[Means for Solving the Problems]
Structure of the multistage pin switch of the present invention for achieving the above object is fitted in the axial direction so as to rise from, the distal end in a conducting state to a casing comprising a probe the Philippines a cylindrical conductor, behind it A plurality of contact pins are sequentially fitted in the casing in the axial direction so as to be movable back and forth by a predetermined length in an insulated state, and a coil-type return spring is attached to each of the search pin and the contact pin, and is attached toward the distal end. the mounting explore the pin is fitted the coil return spring Rutotomoni upon to energize the contact pin except at least the last ones, in a conducting state electrodes isolated from the casing, and return the coil springs and fitted mounting, these pins in a free state of the probing pins are set to open the predetermined distance from one another, probe the Philippines is pushed retracted When the first contact pin behind comes into contact with the first contact pin, the first contact pin conducts, and when the first contact pin that has been retracted by further retreating the contact pin comes into contact with the contact pin behind it, the next contact pin Is such that, as the search pin retreats, the search pin sequentially conducts with a plurality of subsequent contact pins as the search pin retreats.
[0008]
The number of the contact pins may be two or more.
There is no particular limitation on the support of the contact pins arranged in the intermediate portion between the search pin and the last contact pin, and the electrode attaching means is not particularly limited.For example, the return spring is supported by a conductive cylinder electrically insulated from the casing. The present invention can be implemented by a mode in which a through hole is opened in a casing at a position where the conductive cylinder is attached, and an electrode in contact with the conductive cylinder is attached to this portion.
[0009]
The use of the multi-stage pin switch can be used for detecting contact of a connector, detecting warpage of a wiring board, a height difference, detecting a specific position of an object that strokes back and forth with one switch, and the like. it can.
[0010]
[Action]
The search pin and the plurality of contact pins are respectively urged and attached to the distal end side of the casing, and the distal end pin is retracted, and the front and rear pins are formed to conduct when contacting the rear pin, thereby forming one switch. A plurality of stroke positions can be detected with the search pin.
[0011]
【Example】
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
The multi-stage pin switch 3 of the present embodiment shown in FIGS. 1 to 5 includes a search pin 5, a first contact pin 6, and a second contact pin 7 made of metal in a cylindrical casing 4 made of metal in order from the casing tip side. Are fitted so as to be movable forward and backward, respectively.
[0012]
The search pin 5 is provided with a flange 5a at an intermediate portion and a first-stage contact 5b having a narrow first contact pin 6 side. An inner flange-like stopper 4a is attached to the tip of the casing 4 so that the search pin 5 does not escape from the casing 4, and a return spring 5c is mounted between the sleeve 8 made of metal and the flange 5a. The pin 5 is biased toward the distal end of the casing 4. As shown in FIGS. 1 and 2, the sleeve 8 has a circumferential groove 8a formed in the body, and the casing 4 is caulked from above the groove 8a to form a recess 4b, thereby fixing the sleeve 8 at a predetermined position.
[0013]
By forming as described above, the casing 4 and the search pin 5 are electrically connected through the return spring 5c and the sleeve 8.
The first contact pin 6 includes a first-stage contact 6 a having a large diameter at the end of the search pin 5, a second-stage contact 6 b at the second contact pin 7, and a sleeve 9 made of an insulator and a sleeve made of metal. 10 and supported by. The sleeve 9 is made of an insulator and has an inner flange-like stopper 9a, and a through hole 9b formed in the stopper 9a. When the search pin 5 retreats, the first contact pin 6 moves back and forth while being urged toward the distal end of the casing 4 by the return spring 6c.
[0014]
Then, the first contact 5b contacts the first-stage contact 6a through the through hole 9b and conducts each other.
The sleeve 10 made of the metal is fitted on a small-diameter portion of the sleeve 11 made of an insulator, a gap is provided between the sleeve 4 and the sleeve 10, and the sleeve 10 is electrically insulated from the casing 4. Further, a window-shaped opening 4c is provided in the casing 4, and the electrode 12 in contact with this portion is attached to the casing 4 by a holder 12a.
[0015]
The first contact pin 6 and the electrode 12 are electrically connected through the return spring 6c and the sleeve 10, and the search pin 5 is retracted, so that the first-stage contact 5b and the first-stage contact 6a of the first contact pin 6 are formed. When the contact is made, the casing 4 and the electrode 12 conduct.
The second contact pin 7 has a second-stage contact 7a at the tip, and is fitted in a second casing 13 formed of a cylindrical body. An inner flange-shaped stopper 13a is provided at the end of the second casing 13 on the side of the search pin 5, and a return spring 7b for urging the search pin 5 is fitted between the second casing 13 and the second contact pin 7. I am wearing it. Then, the stopper 13 a was sandwiched between the sleeve 11 and the sleeve 14 via the sleeve 14 made of an insulator, and fitted to the casing 4. The sleeve 14 was fixed to the casing 4 at several locations within the groove 14a in the circumferential direction in the same manner as the sleeve 8 by a concave portion 4b formed by caulking the casing 4.
[0016]
The outer periphery of the stopper 13a and the inner peripheral surface of the casing 4 are electrically insulated so as not to contact each other. The second contact pin 7 is electrically connected to the second casing 13 via the return spring 7b. As described above, when both the first-stage contacts 5b and 6a and the second-stage contacts 6b and 7b are closed, the casing 4 and the second casing 13 are electrically connected.
[0017]
In the case of this example, the diameter of the search pin 5 was 1.5 mm, and the outer diameter of the casing 4 was 2.45 mm. With the search pin 5 in a free state, the distance between the first-stage contacts 5b and 6a was set to 5 mm, and the distance between the second-stage contacts 6b and 7b was set to 10 mm. Therefore, when the multi-stage pin switch 3 is moved in the direction of the tip of the search pin 5 and the search pin 5 hits an object (not shown) and retreats 5 mm against the return spring 5c, the casing 4 and the electrode 12 are electrically connected. I do. Further, when the search pin 5 is retracted by 10 mm (15 mm in total), the casing 4 is electrically connected to the second casing 13.
[0018]
FIG. 4 shows a state in which the wires 15a and 15b connected to the continuity detection circuit 15 shown in FIG. 5 are connected to the multi-stage pin switch 3 by crimp terminals 1c, and the wires 15c are connected to the electrodes 12 by soldering.
Next, the principle of conduction detection for detecting the conduction will be described with reference to FIG. In the figure, the electric wire 15a connected to the casing 4 of the multi-stage pin switch 3 is connected to the negative electrode of the battery E, the electric wire 15c connected to the electrode 12 is connected to the light emitting diode 16a, and the electric wire 15b is connected to the light emitting diode 16b. Are connected to the positive electrode of the battery E. Therefore, when the search pin 5 is retracted and the first-stage contacts 5b and 6a are turned on, the light-emitting diode 16a is turned on. When the second-stage contacts 6b and 7b are turned on, the light-emitting diode 16b is also turned on. It can be seen that each has retreated 5 mm and then 10 mm.
[0019]
By using an inspection device in which the multi-stage pin switches 3 formed as described above are arranged so as to correspond to the respective contacts of a connector (not shown) to be inspected, the inspection of the connectors of a plurality of specifications can be performed by a multi-stage pin of one specification. Can be inspected by switch. Further, the multi-stage pin switch 3 can be used for various applications such as being used as a position detection sensor of a robot that performs a control operation at a plurality of stroke positions.
[0020]
【The invention's effect】
The above-described multi-stage pin switch of the present invention is configured such that the search pin and the plurality of contact pins are urged toward the distal end side of the casing , and these pins are spaced from each other by a predetermined distance in the free state of the search pin. Then, as the search pin retreats, the search pin is successively connected to a plurality of contact pins behind, so that a switch that is turned on at a plurality of different stroke positions of the search pin is obtained.
Therefore specifications inspection and terminal mounting state of that different, different inspection test and the like terminal mounting state specification connectors fitted with terminals, the inspection of the warping of the printed wiring board, detects the like of a plurality of control positions, one This can be performed with a multi-stage pin switch having two specifications, so that the inspection or position detection efficiency can be improved, and the cost of the inspection / detector can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a multi-stage switch according to an embodiment of the present invention, which is partially cut away and bisected halfway.
FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a sectional view taken along line III-III of FIG. 1;
FIG. 4 is a partial side view showing a state where an electric wire connection terminal is connected to the multi-stage switch shown in FIG. 1;
FIG. 5 is a conceptual diagram of the conduction detection circuit of the multi-stage switch shown in FIG.
FIG. 6A is a diagram illustrating a state in which a terminal is attached to a housing of a conventional connector, in which A shows before attachment and B shows after attachment.
[Explanation of symbols]
Reference Signs List 3 Multi-stage pin switch 4 Casing 5 Search pin 5 5b First-stage contact 5c Return spring 6 First-contact pin 6a First-stage contact 6b Second-stage contact 6c Return spring 7 Second contact pin 7a Second-stage contact 7b Return spring 12 Electrode 12a Holder 13 Second casing 15 Crimp terminal 16 Continuity detection circuit 16a Light emitting diode 16b Light emitting diode

Claims (2)

Fitted in the axial direction so as to rise from, the tip of the probe the Philippines in a conducting state to a casing consisting of cylindrical conductors, moving a plurality of contact pins on its back, before and after a predetermined length in an insulated state in said casing can sequentially fitted axially, these probing pins and the contact pins, in the explore pin upon urges distally fitted with return coil type each spring and fitted to the coil-type return spring mounting Rutotomoni, contact pin except at least the last ones, in a conducting state electrodes isolated from the casing and attached fitted the coil return spring, the pins in the free state of the probing pins It is set so as to leave a predetermined interval between each other ,
The probe Repin is retracted pushed, the first pin probing the contact with the contact pin and the first contact pin is turned behind, the first contact pin probing pin is retracted by further recession When the next contact pin is in contact with the rear contact pin, the next contact pin is electrically connected to the search pin via the first contact pin, and as the search pin is retracted, the search pin is sequentially connected to a plurality of rear contact pins. Multi-stage pin switch. A return spring of a contact pin arranged at an intermediate portion between the search pin and the rearmost contact pin is supported by a conductive cylinder electrically insulated from the casing, and a through-hole is formed in the casing at a position where the conductive cylinder is attached. 2. The multi-stage pin switch according to claim 1, wherein an opening is formed, and an electrode in contact with said conductive cylinder is attached to this portion.

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