Elastic contact structure of socket contacts

Abstract

The present invention provides an elastic contact structure of a socket contact, in which a rotary block is arranged on the outside of the spine of the plug, a moving contact is arranged on the outside of the rotary block, and a static contact is arranged on the outside of the moving contact. The upper end of the rotary block is pivotally fixed, and a protruding force-bearing part is provided between the upper and lower ends of the rotary block on the side close to the spine, and the lower end of the rotary block extends in a direction away from the spine; the moving contact is a metal sheet body, which has an elastic arm formed by bending and extending upward from a horizontal bottom, and the top of the elastic arm abuts against the side of the lower end of the rotary block away from the spine, and a moving contact is arranged between the upper and lower ends of the elastic arm; the static contact is a metal sheet body, which has two legs arranged separately, and there is a suspended part between the two legs, and a static contact is arranged in the suspended part. The present invention can achieve elastic contact between contacts, thereby avoiding rigid impact, and can improve the operational feel of inserting the plug, and extend the service life of the socket.

Description

Technical Field

[0001] The invention relates to a contact structure of a contact piece in a socket. Background Art

[0002] A socket is a device for plugging in to draw electricity. It has a slot for the plug to be inserted. A rotating block, a moving contact piece and a stationary contact piece are arranged in the slot. When the plug is inserted, the rotating block is driven by the plug to rotate, and the rotating block then moves the moving contact piece, so that the moving contact piece and the stationary contact piece form an electrical connection to complete the power supply work.

[0003] However, in the existing sockets, the movement range of the rotating block and the moving contact is limited, and the static contact is generally rigidly installed, resulting in a rigid collision between the moving contact and the static contact, which is prone to electric sparks. In addition, the moving contact is prone to fatigue. After long-term use, the contact pressure between the moving contact and the static contact becomes smaller and smaller. In severe cases, power connection failure may occur. Summary of the invention

[0004] The purpose of the present invention is to provide an elastic contact structure of a socket contact piece to solve the problem of rigid contact between a moving contact piece and a stationary contact piece.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An elastic contact structure of a socket contact piece, wherein a rotary block is arranged outside the spine of the plug piece, a moving contact piece is arranged outside the rotary block, and a stationary contact piece is arranged outside the moving contact piece, and the characteristics are:

[0007] The upper end of the rotary block is pivotally fixed, a protruding force-bearing portion is provided between the upper and lower ends of the rotary block on one side close to the ridge, and the lower end of the rotary block extends in a direction away from the ridge;

[0008] The movable contact piece is a metal sheet, which has an elastic arm formed by bending upward and extending from a horizontal bottom, the top end of the elastic arm abuts against the side of the lower end of the rotary block away from the ridge, and the elastic arm can push the lower end of the rotary block to a position against the ridge in a free state, and a movable contact is arranged between the upper end and the lower end of the elastic arm;

[0009] The static contact piece is a metal sheet having two legs arranged separately, a suspended part between the two legs, and a static contact point arranged in the suspended part. The two legs are supported so that the suspended part can produce elastic deformation when subjected to pressure.

[0010] The elastic contact structure of the socket contact piece, wherein: the movable contact is arranged near the midpoint between the upper end and the lower end of the elastic arm.

[0011] The elastic contact structure of the socket contact piece, wherein: the support leg is a corrugated structure.

[0012] The elastic contact structure of the socket contact, wherein: when the plug is inserted, the distance in the insertion direction between the force-bearing part of the rotary block and the contact point of the plug to the pivot point of the rotary block is called the first distance, and the distance in the insertion direction from the pivot point of the rotary block to the lower end of the rotary block is called the second distance, and the ratio of the first distance to the second distance is between 0.25-0.35.

[0013] The elastic contact structure of the socket contact piece, wherein: the second distance is between 8-10 mm.

[0014] Compared with the prior art, the present invention has the following beneficial effects: by increasing the swing range of the elastic arm, increasing the movement distance of the moving contact on the elastic arm, and increasing the elastic activity margin of the static contact on the static contact piece, the present invention can achieve elastic contact between the contacts, thereby avoiding rigid impact, and can improve the operational feel of inserting the plug, thereby extending the service life of the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the exploded structure of an anti-electric shock safety socket.

[0016] Figure 2 It is a three-dimensional schematic diagram of the contact structure of the elastic contact piece (only one rotating block is drawn).

[0017] Figure 3 It is a cross-sectional structural diagram of the elastic contact structure before the plug is inserted.

[0018] Figure 4 It is a cross-sectional structural diagram of the elastic contact piece contact structure after the plug piece is inserted.

[0019] Explanation of the reference numerals: upper cover 1; middle frame 2; rear cover 3; lower cover 4; rotary block 5; pivot point 51; force-bearing portion 52; plug handle 6; moving contact piece 7; elastic arm 71; moving contact point 72; static contact piece 8; support leg 81; suspended part 82; static contact point 83; plug piece 9; ridge 91; first distance h; second distance H. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, it is a safety socket to prevent electric shock, which includes an upper cover 1, an intermediate frame 2, a rear cover 3 and a lower cover 4. The upper cover 1 is provided with a socket for inserting the plug of the plug, and a rotary block 5 is pivoted on both sides of each socket. The intermediate frame 2 is fixed with a plug handle 6. A moving contact piece 7 and a static contact piece 8 are fixed between the rear cover 3 and the intermediate frame 2. The lower cover 4 covers the upper cover 1 accordingly.

[0021] like Figure 2-Figure 4As shown, the insert 9 has two planar portions and two ridges 91 arranged oppositely, the insert handle 6 can clamp the two planar portions of the insert 9, and a rotary block 5 is arranged outside each ridge 91 of the insert 9; the rotary block 5 is C-shaped as a whole, and its upper end is pivotally connected to the upper cover 1 through a pivot point 51 so as to be able to swing, and a protruding force-bearing portion 52 is provided on one side between the two ends close to the ridge 91, and the lower end of the rotary block 5 extends in a direction away from the ridge 91;

[0022] The movable contact piece 7 is a metal sheet, which has an elastic arm 71 formed by bending upward and extending from a horizontal bottom, the top end of the elastic arm 71 abuts against the side of the lower end of the rotary block 5 away from the ridge 91, and the elastic arm 71 can push the lower end of the rotary block 5 to a position against the ridge 91 in a free state, and a movable contact 72 is arranged near the midpoint between the upper and lower ends of the elastic arm 71;

[0023] The static contact piece 8 is a metal sheet having two legs 81 arranged separately, a suspended portion 82 between the two legs 81, and a static contact point 83 arranged on the suspended portion 82. In this embodiment, the legs 81 are of a corrugated structure and abut against the intermediate frame 2, so that the suspended portion 82 can be elastically deformed when subjected to pressure.

[0024] like Figure 3 As shown, before the insert 9 is inserted, the elastic force of the elastic arm 71 pushes the lower end of the rotary block 5 to a position close to the ridge 91; Figure 4 As shown, after the insert 9 is inserted, the ridge 91 of the insert 9 interferes with the force-bearing portion 52 of the rotary block 5, causing the rotary block 5 to rotate around the pivot point 51 at the upper end, and the lower end of the rotary block 5 swings in the direction away from the ridge 91, driving the upper end of the elastic arm 71 to swing in the direction away from the ridge 91 to the extreme position, and the moving contact 72 on the elastic arm 71 also moves accordingly and contacts the static contact 83 on the static contact piece 8. During the contact process, the rotary block 5 part of the static contact piece 8 can be elastically deformed to avoid rigid collision.

[0025] In order to increase the range of motion of the elastic arm 71 of the movable contact piece 7, the present invention adjusts the length ratio of the upper and lower parts of the rotary block 5, such as Figure 4 As shown, when the inserting piece 9 is inserted, the distance in the insertion direction between the contact point between the force-bearing portion 52 of the rotary block 5 and the inserting piece 9 and the pivot point 51 of the rotary block 5 is called the first distance h, and the distance in the insertion direction between the pivot point 51 of the rotary block 5 and the lower end of the rotary block 5 is called the second distance H, and the ratio of the first distance h to the second distance H is between 0.25-0.35. In addition, the second distance H is between 8-10 mm.

[0026] By configuring in this way, by increasing the swing range of the elastic arm 71, increasing the movement distance of the movable contact 72 on the elastic arm 71, and increasing the elastic activity margin of the static contact 83 on the static contact piece 8, the present invention can achieve elastic contact between the contacts, thereby avoiding rigid impact, and can improve the operational feel of inserting the plug 9, thereby extending the service life of the socket.

[0027] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. An elastic contact structure of a socket contact, comprising an insert and an insert grip, wherein the insert has two oppositely arranged plane portions and two oppositely arranged ridge portions, the insert grip can clamp the two plane portions of the insert, a rotary block is arranged outside the ridge portion of the insert, a moving contact piece is arranged outside the rotary block, and a stationary contact piece is arranged outside the moving contact piece, characterized in that: The upper end of the rotary block is pivotally fixed, a protruding force-bearing portion is provided between the upper and lower ends of the rotary block on one side close to the ridge, and the lower end of the rotary block extends in a direction away from the ridge; The movable contact piece is a metal sheet, which has an elastic arm formed by bending upward and extending from a horizontal bottom, the top end of the elastic arm abuts against the side of the lower end of the rotary block away from the ridge, and the elastic arm can push the lower end of the rotary block to a position against the ridge in a free state, and a movable contact is arranged between the upper end and the lower end of the elastic arm; The static contact piece is a metal sheet having two legs arranged separately, a suspended part between the two legs, and a static contact point arranged in the suspended part. The two legs are supported so that the suspended part can produce elastic deformation when subjected to pressure.

2. The elastic contact structure of the socket contact according to claim 1, characterized in that: The movable contact is arranged near the midpoint between the upper end and the lower end of the elastic arm.

3. The elastic contact structure of the socket contact according to claim 1, characterized in that: The supporting legs are of corrugated structure.

4. The elastic contact structure of the socket contact according to claim 1, characterized in that: When the insert is inserted, the distance in the insertion direction between the contact point between the force-bearing part of the rotary block and the insert to the pivot point of the rotary block is called the first distance, and the distance in the insertion direction from the pivot point of the rotary block to the lower end of the rotary block is called the second distance. The ratio of the first distance to the second distance is between 0.25-0.

35.

5. The elastic contact structure of the socket contact according to claim 4, characterized in that: The second distance is between 8-10 mm.

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