SU1179558A1 - Contact device - Google Patents

Abstract

A CONTACT DEVICE containing a guide, a movable card with grooves, rigid spring-loaded contacts with protrusions located in the grooves of the mobile board, and a retainer installed with the ability to interact with the protrusions under / 8h 0 & Vn X tshttt jw. LAN 13/4 7 16 11 12 20 spring-loaded contacts, characterized in that, in order to increase the reliability of contact, stops are made on the inner surface of the guide, grooves are made on the surface of the movable board to accommodate the projections of spring-loaded contacts, and the lock is made in Bi- The spring of the spring loaded lever with protrusions at the ends pivotally mounted on the movable plate with the successive interaction with one of its ends with the protrusions of the spring-loaded contacts, and the other spring-loaded end with the stops of the guide. in gz 8 22 - ZZZ ZZZZZh

Description

fPi / e.f

one

The invention relates to radio engineering, in particular to contact connectors of instrumentation and can be used to control printed circuit boards, microcircuit cases, and the like.

The aim of the invention is to improve the reliability of contact due to the fact that the latch, made in the form of a spring-loaded lever, when interacting with rigidly fixed protrusions of the contacts, is a rigid system that does not change the impact energy of the contacts and, therefore, does not introduce a variation in the transient values contact resistance.

FIG. 1 shows a contact device made in the form of a multi-contact head, in the initial position, section; in fig. 2 the same, intermediate position; in fig. 3 - the same, contact position; in fig. 4 and 5, respectively, view A and view B in FIG. one.

The contact device consists of a guide 1, a mobile board 2 and a fixed board with respect to the guide 1 of the board in the form of a fixed block 3 rigidly connected to the guide 1.

In the holes of the movable board 2 and the pads 3 there are hard contacts 4 having a sharp working end 5, flag projections 6 and shanks 7 with bushings 8 at the ends. Contacts 4 are spring loaded 9.

The diameter of the shank 7 is significantly smaller than the diameter of the contact 4. In the non-movable shoe, 3 holes are stepped. The diameter of the larger hole is larger than the diameter of the spring 9, and the diameter of the smaller hole is larger than the diameter of the shank 7. The shoulders in the holes form the stop surfaces for the spring 9.

In the mobile board 2, on the side opposite to the ends 5 of the contacts 4, there are grooves 10 in which the flag protrusions 6 of the contacts 4 move. On the mobile board 2 in the slot (not shown) there is a lock 11, made in the form of a flat lever with the projections 12 and 13 at the ends. The latch 11 is installed with the possibility of rotation about the axis 14 and is spring loaded by a spring 15 attached to the movable

795582

board 2. The locking lever 11 cooperates with a height-adjustable stop 16, which is located in the groove 17 of the guide 1 and is fixed by a 5 screw 18. In addition, the protrusion 12

the latch 11 interacts with the flag protrusions of the 6 pins 4. The latch 11 can be manufactured both on each pin 4 and on a group of contacts.

The mobile board 2 is connected to the fixed block 3 by means of a screw 19 and is spring loaded by a spring 20; position 21 is the object to be scanned.

5 The signal from pin 4 through the conductor 22 enters the measuring unit (not shown). I Contact 4 is set to the desired size (Fig. 1). Wherein

0, the sleeves 7 are put on the sleeves 8 up to the stop in the shoe 3 and attached (sleeve 8) to the shanks 7, for example, by soldering, to form external stops with a preliminary tension of the springs

5 9. At the same time, there is a gap b between the flag protrusions 6 and the protrusion 12 interacting with it of the retainer 11 (Fig. 1).

Mobile Board 2 with

The Q screw 19 is mounted relative to the fixed block 4 to size 1 (Fig. 1) to provide a gap a between the flag projections 6 and the bottom of the grooves 10 at the time of contact (Fig. 3). There is a gap with between the fixed block 3 and the sleeves 8 of the shank 7 (Fig. 3),

The contact device works as follows.

0 Under the action of the spring 20, the movable plate 2 is in the extreme extended position and is fixed with a screw 19. The clamp 11 under the action of the spring 15 is in the position

5 when the protrusion 12 is pushed under the flag protrusions 6 of the contacts 4 (FIG. 1). When leading the contact device to the inspected object 21 (printed circuit board, etc.) and

0 of the working stroke, the guide with the stationary block 3 and the contacts 4 advances on the movable board 2, which is fixed to the object to be inspected 21, and the gap b between the flag lugs 6 and the lug 12 of the retainer 11 disappears and the flag lugs 6 begin to abut against the lug 12 (Fig. 2). Upon further movement of the guide 1 with the fixed block 3, the contacts 4 remain fixed, and the springs 9 begin to contract. At the same time, a gap is formed between the fixed block 3 and the sleeves 8 of the shanks 7 (Fig. 2). Then, when the guide 1 moves, the stop 16 located in the groove 17 of the housing attaches the protrusion 13 of the retainer 11. The latch 11 rotates around the axis 14 and the protrusion 12 of the retainer 11 escapes from the flag protrusions 6 of the contacts 4. The contacts 4 under the action of compressed springs 9 rush at a high speed onto the surface of the object under test 21 and the working ends 5 destroy or pierce the paint or oxide films, thereby providing a reliable electr cal contact (fig.Z).

After the working stroke, the contact device is removed from the object 21. At this time, under the action of the spring 20, the movable board 2 leaves the housing (and occupies the initial initial position. At the same time, under the action of the springs 9, the sleeves 8 abut against the stationary block 3 and the contacts A stop. Protrusion 13 the latch 11 emerges from the interaction with the stop 16 and the latch 11, having swung, moves with the help of the spring 15 to the initial position, when the protrusion 12 of the detentor 11 is pushed under

0 flag tabs 6 pins 4 (Fig. 1).

A normal contact device is provided by observing the gap in the initial position (Fig. 1) and the gaps in the contact position (Fig. 3), which is ensured by matching sizes 1 and Ij (Fig. 1) with the help of bushings 8 shanks 7 and screws 19.

Thus, the proposed device is characterized by high accuracy of control and reliability.

FIG. five

Claims (1)

A CONTACT DEVICE comprising a guide, a movable circuit board with grooves, rigid spring-loaded contacts with protrusions located in the grooves of the movable circuit board, and a latch mounted to interact with protrusions under the spring contacts, characterized in that, in order to improve the reliability of contacting, on the inner surface stops are made on the guide, grooves are made on the surface of the movable plate to accommodate the protrusions of the spring-loaded contacts, and the latch is made in the form of a spring-loaded lever with protrusions at the ends mounted pivotally on a movable board with the possibility of alternating interaction with one of its ends with the protrusions of the spring-loaded contacts, and the other with a spring-loaded end - with the stops of the guide. At 16 11 13 14 17 2222 ^ 22 ^^ //// ^ 12 20 3 Figure 1 ►1 "