JP2017050202A - Socket for electric component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for electric component capable of suppressing generation of waste metal by preventing a cover member and a lock mechanism from being rubbed.SOLUTION: An IC socket 10 comprises a socket body 20, a cover member 30 and a lock mechanism 40. The lock mechanism 40 includes a latch member 41 which locks the cover member 30 in a closed state at a side of another end 23 of the socket body 20, and a lock lever 42 which is rotated relatively to the socket body 20 at the side of the other end 23 to move the latch member 41. The lock lever 42 includes a pair of lever lateral portions 42d and a lever distal end portion 42c. The lever lateral portions 42d are opened to the outside and energized to the inside by springs 43b for lever. In an intermediate part of the cover member 30, protruding parts 38 are provided to which engage holes 42e of the lever lateral portions 42d are engaged. When locking the socket, the lock lever 42 is rotated in a closing direction, the lever lateral portions 42d are opened to the outside against energizing forces and then closed to the inside by the springs 43b for lever, and the engage holes 42e are engaged with the protruding parts 38.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a socket for an electric component that is disposed on a wiring board and accommodates the electric component in order to test an electric component such as a semiconductor device (hereinafter referred to as “IC package”).

  Conventionally, as this type of “socket for electrical components”, there is an IC socket that detachably accommodates an IC package that is an “electrical component” (see Patent Document 1).

  As the IC package, for example, a rectangular package body is provided, and terminals are provided on the package body.

  On the other hand, the IC socket is configured such that an IC package is accommodated in the socket body, and a cover member is provided on the socket body so as to be freely opened and closed. Further, when the cover member is closed, a lock lever is provided. It has a lock mechanism that rotates and locks. The IC package is pressed while the cover member is closed and locked by the lock mechanism, and the terminals of the IC package are brought into contact with the contact pins.

Japanese Patent No. 5584072.

  However, in the conventional one, when the cover member is closed and locked by the lock mechanism, the substantially U-shaped lock lever is rotated, and both protrusions are formed on both outer sides of the cover member. It was configured to come into contact with the pin from above and get over it, thereby being locked.

  In the case of such a configuration, when the lock lever gets over the protruding pin, the frictional force may be increased, and in this case, there is a problem that metal scraps are easily generated by rubbing both.

  Therefore, an object of the present invention is to provide an electrical component socket that can prevent the scraping of the cover member and the lock mechanism and suppress the generation of metal scraps.

  In order to achieve the above object, an invention according to claim 1 is an electrical component socket disposed on a wiring board and accommodating an electrical component, the electrical socket being disposed on the wiring substrate, wherein the electrical A socket body having a housing portion for housing the component, and a cover member that is pivotally attached to one end side of the socket body and presses the electrical component housed on the housing portion in a closed state. A lock mechanism that is provided in the socket main body and locks the cover member in a closed state, and the lock mechanism is provided on the other end side of the socket main body in a closed state of the front end side of the cover member. A locking portion for locking, and a lock lever for moving the locking portion by rotating with respect to the socket body at the other end of the socket body, the lock lever being The above-mentioned salmon A pair of lever side portions extending substantially in parallel from the other end side of the main body, and a lever tip portion provided so as to connect both at the tip end side of the lever side portion. The side portion is formed so as to open toward the outside, and is biased toward the inside by the biasing means, and the lever is provided at the intermediate portion of the socket body or the cover member. When the cover member is locked in the closed state, the lock lever is rotated in the closing direction, and the pair of the above-mentioned engagement portions are engaged with the engagement portions provided on the side portions. After the lever side portion is opened outward against the urging force of the urging means, the engaging portion is engaged with the engaged portion by being closed inward by the urging means. It is characterized by having a socket for electrical parts configured in

  In addition to the invention according to claim 1, the invention according to claim 2 is a direction in which the tip end side of the pair of lever side portions opens outward with respect to the lever tip portion. And has a biasing means for biasing the tip side of the lever side portion toward the inner tip of the lever, and locks the cover member in a closed state. In this case, the lock lever is rotated in the closing direction, and the tip end side of the pair of side portions of the lever is opened to the outside against the urging force of the urging means. The engagement portion is configured to be engaged with the engaged portion by being closed inward by a biasing means.

  According to the first aspect of the present invention, the pair of lever side portions of the lock lever of the lock mechanism are formed so as to open outward and are biased in the direction of closing inward, and the pair of lever sides By closing the inner portion after opening the outer portion against the biasing force, the engagement portion is engaged with the engaged portion, thereby preventing the cover member and the lock mechanism from rubbing. Generation of metal scraps can be suppressed.

  According to the second aspect of the present invention, in the lock lever, the tip end sides of the pair of lever side portions are held so as to be movable outwardly with respect to the lever tip end portions, and the lever side portion By having a biasing means that biases the tip of the lever toward the inner lever tip, the lever side can be reliably opened outward and the lever side moved outward The direction portion can be automatically returned to the inside, and the rubbing between the cover member and the lock mechanism can be prevented more reliably and the generation of metal scraps can be suppressed.

It is a top view of the IC socket which concerns on embodiment of this invention, The upper half is a state of the state which opened the cover member, and the lower half is the state of the locked state. It is a side view of IC socket concerning the embodiment. It is a front view of the IC socket which concerns on the same embodiment. It is a cross-sectional view of the IC socket according to the embodiment. It is a top view in the state where the lever side part in the IC socket concerning the embodiment was opened outside. It is a side view of the state which opened the lever side part in the IC socket which concerns on the embodiment outside. It is sectional drawing which shows an internal motion of the locking mechanism in the IC socket which concerns on the embodiment. It is an expanded sectional view showing movement near a contact pin in an IC socket concerning the embodiment. It is a front view which shows the IC package which concerns on the same embodiment.

  Embodiments of the present invention will be described below.

  1 to 9 show an embodiment of the present invention.

  First, the configuration will be described. An IC socket 10 as an “electrical component socket” in this embodiment is arranged on a wiring board 1 as shown in FIG. Further, an IC package 3 (see FIG. 9) as an “electrical component” is accommodated, and the electrodes (not shown) of the wiring board 1 and the spherical terminals (solder balls) 5 of the IC package 3 are electrically connected. It is configured as follows. For example, it is used for a burn-in test of the IC package 3 or the like.

  The IC package 3 of this embodiment has a square shape in plan view, and has a package body 4 having a predetermined thickness H1 as shown in FIG. A plurality of terminals 5 are formed to protrude in a matrix.

  On the other hand, the IC socket 10 is fixed on the wiring board 1 as shown in FIGS. 2 and 3, and as shown in FIGS. 1 to 4, the socket body 20 that houses the IC package 3, and the socket body 20. And a cover member 30 that opens and closes a floating plate 55, which will be described later, and presses the IC package 3, and a lock mechanism 40 that locks when the cover member 30 is closed.

  More specifically, as shown in FIG. 1 and the like, the socket body 20 includes a frame member 21 fixed on the wiring board 1 and formed in a frame shape, and contact pins provided inside the frame member 21. Unit 50. As shown in FIG. 8, the contact pin arrangement unit 50 includes an upper plate 51, a lower plate 53, and an “accommodating portion” that accommodates the IC package 3 while being biased upward with respect to the upper plate 51. As a floating plate 55.

  Further, as shown in FIG. 8, a plurality of upper through holes 52 provided in the upper plate 51, a plurality of lower through holes 54 provided in the lower plate 53, and a plurality of through holes provided in the floating plate 55. 57, the contact pins 60 are inserted and held, whereby a plurality of contact pins 60 are arranged in a matrix. The contact pins 60 are in contact with the lower surface of the spherical terminal 5 of the IC package 3 and are electrically connected to the electrodes of the wiring board 1.

  As shown in FIG. 8, each contact pin 60 is made of an upper contact member 61 made of a conductive metal material that contacts the spherical terminal 5 of the IC package 3 and a conductive metal material that makes contact with the electrode of the wiring board 1. The lower contact member 62 is stretchably combined, and the coil spring 63 is disposed between the upper contact member 61 and the lower contact member 62 and urges them in the direction in which both are extended.

  And the contact pin 60 comprised by these is inserted in the upper side through-hole 52 and the lower side through-hole 54 along the up-down direction. Further, the upper contact member 61 is moved up and down mainly in the upper through hole 52, and the lower contact member 62 is moved up and down mainly in the lower through hole 54.

  In addition, the floating plate 55 is biased upward by a spring (not shown) and the like, and a large number of through holes 57 (see FIG. 8) through which the contact pins 60 are inserted are formed. A guide portion (not shown) for guiding the portion is formed.

  Moreover, the cover member 30 has the frame 31 and the press member 32 as shown in FIGS. Among these, the frame body 31 is a substantially rectangular member provided so as to be rotatable with respect to the socket body 20, and the base end 31 a (right end portion in FIG. 1) side of the frame body 31 is the side of the socket body 20. The frame member 21 is attached to the one end 22 side of the frame member 21 via a rotation shaft 34 provided substantially along the horizontal direction.

  Further, as shown in FIG. 4, a pressing member 32 is provided on the inner side of the frame 31, and is pivoted at an intermediate portion between the base end 31 a side and the distal end 31 b side (left end side in FIG. 1) of the frame body 31. 34 and a pair of shafts 35 provided in a substantially horizontal direction so as to be swingable. Projecting as an “engaged portion” to which the lock lever 42 engages when the lock lever 42 (described later) is rotated in a closing direction, at the tip end portions of the pair of shafts 35 (outer portions of the frame 31). The part 38 is formed so as to protrude outwardly in a mountain shape.

  In addition, as shown in FIG. 2, the pressing member 32 protrudes downward so as to press the IC package 3 accommodated in the floating plate 55 when the cover member 30 is closed, and has a substantially square shape in plan view. A portion 33 is provided.

  Further, as shown in FIG. 2, the pressing member 32 has a fin-like heat sink portion 36 provided integrally with the upper portion of the pressing portion 33. Then, the heat of the IC package 3 is released from the heat sink portion 36 through the pressing portion 33 that is in contact with the IC package 3. Here, the heat sink portion 36 is formed in a shape having a larger vertical and horizontal width than the pressing portion 33.

  1 to 6, the lock mechanism 40 is provided on the other end 23 side of the frame member 21 of the socket main body 20, and a pair of rotatable substantially U-shaped lock levers 42 are paired. The base member 44 is provided. The base member 44 is provided so as to be rotatable with respect to the frame member 21 of the socket body 20 by a lever rotation shaft 46, and is configured to rotate together with the lock lever 42.

  Further, between the pair of base members 44, a latch member 41 is provided as a “locking portion” that locks in a closed state on the front end 31 b side (the left end side in FIG. 1) of the frame body 31. Inside the latch member 41, a cam mechanism 45 (see FIG. 7) for moving the latch member 41 up and down is provided. The details of the cam mechanism 45 will be described later.

  1 to 4, the lock lever 42 includes a pair of elastically deformable substantially plate-like lever side portions 42d and lever side portions 42d extending from the base end portion 42a side to the tip end portion 42b side. Are formed in a substantially U-shape consisting of a substantially round bar-shaped lever tip portion 42c connecting the tip portions 42b. Each of the base end portions 42 a of the two lever side portions 42 d is attached to a pair of base members 44 provided on both sides of the latch member 41.

  Further, the lock mechanism 40 is provided with an engagement hole 42e as an “engagement portion” in an intermediate portion between the base end portion 42a side and the distal end portion 42b side of the pair of lever side portions 42d of the lock lever 42. It has been. The engaging hole 42e is formed so as to penetrate the side surface of the lever side portion 42d, and when the lock lever 42 is rotated and closed, the protruding portion 38 of the cover member 30 is just fitted. It is formed in position, size and shape.

  Further, both end portions of the lever tip portion 42c to which the tip portions 42b of the pair of lever side portions 42d are attached are held so as to be movable in the direction of opening the tip portions 42b of the pair of lever side portions 42d outward. It has become. In this embodiment, a screw member 43a and a lever spring 43b as "biasing means" are provided, and a holding hole 42f (see FIG. 4) provided on the distal end portion 42b side of the lever side portion 42d. The screw member 43a is screwed to the outside via a lever spring 43b.

  With this configuration, the lever side portion 42d is biased toward the inner lever tip portion 42c by the lever spring 43b, as shown in FIG. The side portions 42d are arranged so as to be substantially parallel. Further, as shown in FIG. 5, when the distal end portion 42b side of the pair of lever side portions 42d is moved outward along the screw member 43a against the biasing force of the lever spring 43b, While the two lever side portions 42d are elastically deformed, the tip end portion 42b side is opened and moved in a substantially C shape.

  Then, when the cover lever 30 is locked by rotating the lock lever 42, the tip end portion 42b side of the lever side portion 42d is elastically deformed against the urging force of the lever spring 43b during the rotation. As shown in FIGS. 5 and 6, the engagement hole of the lever side portion 42 d is in a state where the protrusion 38 of the cover member 30 is not touched or is touched with a small frictional force. 42e can be moved to the position of the protrusion 38.

  Thereafter, the protruding portion 38 is moved into the engagement hole 42e by the biasing force of the lever spring 43b and the restoring force of elastic deformation moving in the direction in which the tip end portions 42b of the pair of lever side portions 42d are closed inward. The lock lever 42 is engaged with the cover member 30 and is locked by the lock mechanism 40.

  Further, the cam mechanism 45 moves the latch member 41 downward by rotating the lock lever 42 in the direction of arrow A in FIG. 2 from the state shown by the two-dot chain line in FIG. As shown by the lower half of FIG. 1 and the solid line in FIG. 2, the pressing member 32 presses the IC package 3.

  Specifically, as shown in FIG. 2, the cam mechanism 45 is configured such that the lever side portion 42 d and the base member 44 fall down by turning in the direction of arrow A in FIG. 2, and stand up by turning in the opposite direction. The latch member 41 is moved up and down in conjunction with the movement of the lever side portion 42d, and the cover member 30 is held in the closed state by pushing down the tip 31b side of the frame body 31 of the cover member 30 shown in FIG. At the same time, the IC package 3 is pressed by the pressing portion 33 of the pressing member 32. As shown in FIG. 7, the latch member 41 in which the cam mechanism 45 is disposed is engaged with a latched portion 31c (see FIG. 4) provided on the tip 31b side of the cover member 30. A pawl 47 is formed and urged upward by a spring member (not shown).

  Further, as shown in FIG. 7, the cam mechanism 45 is formed in the latch member 41 with a long hole 41 b that is long in the vertical direction through which the lever rotation shaft 46 is inserted. Further, a concave portion 41c for positioning the long hole 41b on the inner side is formed on one side of the latch member 41. A cam 48 fixed to the lever rotation shaft 46 is disposed in the recess 41c, and the tip 48a abuts on the lower side surface 41d of the inner surface of the recess 41c, so that the lock lever 42 is rotated. Along with the movement, the tip 48a of the cam 48 slides on the lower surface 41d of the recess 41c.

  As shown in FIG. 2, when the lock lever 42 is turned in the direction of arrow A and falls down, the cam 48 provided on the lever turning shaft 46 in the state of FIG. It contacts the lower side surface 41d of 41c and moves from right to left through FIG. 7B to the state of FIG. 7C. As a result, the lower side surface 41d of the recess 41c of the latch member 41 is pressed by the tip 48a of the cam 48, the latch member 41 descends diagonally to the left, and the locking claw 47 of the latch member 41 engages with the cover member 30. The cover member 30 is pushed down by being locked to the stop portion 31c. Then, the engaging hole 42e of the lever side portion 42d of the lock lever 42 is engaged with the protruding portion 38 that protrudes to the outside of the frame 31 of the cover member 30, so that the lock member 42 is locked in the above-described pressing state. It is comprised so that it may be in a state.

  Next, the operation of the IC socket 10 having such a configuration will be described.

  First, as shown in the upper half of FIG. 1 and the two-dot chain line in FIG. 2, in a state where the cover member 30 and the lock mechanism 40 of the IC socket 10 are opened, the floating plate 55 is urged upward by a spring. 8A, the tip of the upper contact member 61 of the contact pin 60 is in the through hole 57 of the floating plate 55. Next, the IC package 3 is accommodated on the floating plate 55 by an automatic machine or the like. At the time of accommodation, the IC package 3 is guided by a guide portion (not shown) of the floating plate 55.

  Thereafter, the cover member 30 is rotated in the direction of arrow B in FIG. 2, and the cover member 30 is closed as indicated by the solid line in FIG. 2, and latched on the front end 31b side (left end side in FIG. 1) of the frame 31. The member 41 is locked.

  Thereafter, the lock lever 42 is moved from the open state as shown in the upper half of FIG. 1 and the two-dot chain line in FIG. 2 to the intermediate state as shown in FIGS. The latch member 41 is moved downward, the IC package 3 is pressed by the pressing member 32, and the “engagement portion” of the lever side portion 42d of the lock lever 42 is moved. By fitting the protruding portion 38 as the “engaged portion” of the cover member 30 into the engagement hole 42e, the locked state is brought about in the above-described pressing state.

  More specifically, the lock lever 42 is rotated with respect to the socket body 20 together with the base member 44 by rotating the lock lever 42 in the direction of arrow A in FIG. Then, the cam 48 of the cam mechanism 45 provided on the lever rotation shaft 46 that rotates together with the lock lever 42 as shown in FIG. 7 (a) rotates counterclockwise as shown in FIG. 7 (b). Further, it is further rotated to a place where the cam 48 is disposed sideways as shown in FIG.

  As a result, the cam 48 slides in the recess 41c, and the cam 48 presses the recess 41c downward from the inside. As a result, the latched portion 31c of the cover member 30 is latched by the latch member 41 and pressed downward.

  Further, by rotating the lock lever 42 while moving the tip end portion 42b side of the lever side portion 42d to be opened outward while being elastically deformed against the urging force of the lever spring 43b, FIG. As shown in FIG. 6 and FIG. 6, the lever side portion 42d and the protrusion 38 of the cover member 30 are not touched or touched in a state where the frictional force is small. Move to the position.

  Thereafter, when the lever spring 43b is urged and elastically deformed to move the tip end portions 42b of the pair of lever side portions 42d in the direction of closing inward, the protruding portion 38 is fitted into the engagement hole 42e. Thus, the lock lever 42 is engaged with the cover member 30. Thereby, the cover member 30 is locked in the closed state by the lock lever 42.

  In this state, a current is passed through the IC package 3 to perform a burn-in test or the like.

  After the burn-in test or the like, the tip end portion 42b side of the lever side portion 42d is elastically deformed against the biasing force of the lever spring 42e from the position shown in the lower half of FIG. 1 and the solid line in FIG. Then, the locking hole 42 is rotated in the direction opposite to the arrow A direction in FIG. As a result, even when the lock lever 42 is opened, the lever side portion 42d and the protruding portion 38 of the cover member 30 can be touched without touching or with a small frictional force.

  Thereafter, after a halfway state as shown in FIGS. 5 and 6, the lock lever 42 is moved to the position shown by the upper half of FIG. 1 and the two-dot chain line in FIG. After moving the cover member 30 from the position indicated by the solid line to the position indicated by the two-dot chain line to open the cover member 30, the IC package 3 is taken out of the floating plate 55 by an automatic machine or the like.

  As described above, the IC socket 10 of this embodiment is formed so that the pair of lever side portions 42d of the lock lever 42 of the lock mechanism 40 opens outward and is biased in the direction of closing inward. The pair of lever side portions 42d are opened to the outside against the urging force and then closed to the inside, whereby the engagement hole 42e is engaged with the protruding portion 38, thereby locking the cover member 30 and the cover member 30. It is possible to prevent the mechanism 40 from rubbing and suppress the generation of metal scraps.

  Further, the IC socket 10 of this embodiment is configured such that the lock lever 42 is held movably in a direction in which the distal end portions 42b of the pair of lever side portions 42d open outward with respect to the lever distal end portion 42c. By having the lever spring 43b that urges the distal end portion 42b side of the side portion 42d toward the inner lever distal end portion 42c, the lever side portion 42d can be reliably opened outward. The lever side portion 42d moved to the outside can be automatically returned to the inside, and the cover member 30 and the lock mechanism 40 can be more reliably prevented from being rubbed and the generation of metal scraps can be suppressed. .

  In the above-described embodiment, the present invention is applied to the IC socket 10 as the “electrical component socket”. However, the present invention is not limited to this and can be applied to other devices.

  In the embodiment described above, the lever side portion 42d is biased inward by the lever spring 43b made of a coil spring. However, the present invention is not limited to this. With this configuration, the tip of the lever side portion may be biased inward.

  Further, in the above-described embodiment, the pair of lever side portions 42d is elastically deformed outward, and the tip end portion 42b side of the pair of lever side portions 42d is movable in a direction to open from the inside to the outside. In addition, the lever springs 42e bias the tip portions 42b of the pair of lever side portions 42d toward the inner lever tip portion 42c, but the present invention is not limited to this. For example, the lever side portion is opened only by a configuration in which the lever side portion is not elastically deformed, and the tip end side of the lever side portion moves in the opening direction, and a pair of levers is provided by the biasing means. A configuration may be adopted in which the distal end portion side of the side portion is biased toward the inner lever distal end portion side. In this case, it is necessary that the mounting state on the base end portion side of the lever side portion has a margin so that the lever side portion can move in a direction to open outward by a predetermined amount.

  Further, in the above-described embodiment, the lever side portion 42d is moved in the opening direction or urged in the closing direction through the portion on the tip end portion 42b side. Instead, the portion other than the distal end side, for example, the proximal end side, the intermediate portion, or the entire lever side portion may move in the opening direction or be biased in the closing direction.

  In the above-described embodiment, the latch member 41 is used as the locking portion in the lock mechanism 40. However, the present invention is not limited to this, and the cover member is locked by a configuration other than the latch mechanism. May be.

  In the above-described embodiment, when the cover member 30 is locked in the closed state, the protruding portion 38 provided in the cover member 30 is fitted into the engagement hole 42e of the lever side portion 42d of the lock lever 42. However, the present invention is not limited to this, and the protruding portion may be provided on the socket body. In addition, the engaging part on the side part of the lever does not have a hole, and the engaging part gets over the protruding part of the socket body or the cover member so that the cover member is locked in the closed state by the lock lever. It may be. Further, the engaged portion of the socket main body or the cover member is not limited to the protruding portion, and may have another configuration.

  In the embodiment described above, the lock mechanism 40 is provided with a pair of base members 44 on both sides of the latch member 41, and a substantially U-shaped lock lever 42 is attached to the pair of base members 44. However, the present invention is not limited to this, and the lock mechanism may have another configuration such that there is no base member and the side portion of the lever is directly attached to the locking portion.

  In the above-described embodiment, the so-called BGA in which spherical terminals 5 are provided on the lower surface of the package body 4 is used as the IC package, and the IC socket 10 that accommodates this is described. However, the present invention is not limited to this. The present invention may be applied to an IC socket that accommodates another IC package such as an IC package called an LGA.

  In the above-described embodiment, the IC package 3 is used as an electrical component. However, the present invention is not limited to this, and the present invention may be applied to other electrical components.

1 Wiring board
3 IC package (electrical parts)
10 IC socket (socket for electrical parts)
20 Socket body
22 One end
23 other end
30 Cover member
31a proximal
31b Tip
38 Protruding part (engaged part)
40 Locking mechanism
41 Latch member (locking part)
42 Lock lever
42a Base end
42b Tip
42c Lever tip
42d Lever side
42e Engagement hole (engagement part)
43b Lever spring (biasing means)
55 Floating plate (container)

Claims (2)

An electrical component socket disposed on a wiring board and containing electrical components,
A socket body disposed on the wiring board and having a housing portion in which the electrical component is housed;
A cover member that is pivotally attached to one end side of the socket body and presses the electrical component housed on the housing portion in a closed state;
A lock mechanism provided in the socket main body and locking the cover member in a closed state;
The locking mechanism is provided on the other end side of the socket main body and locks the front end side of the cover member in a closed state, and rotates on the socket main body on the other end side of the socket main body. A lock lever that moves the locking part by moving
The lock lever is provided so as to connect a pair of lever side portions extending substantially in parallel from the other end side of the socket body with the engaging portion interposed therebetween, and a distal end portion side of the lever side portion. A pair of lever side portions are formed so as to open toward the outside and are biased toward the inside by the biasing means,
An intermediate portion of the socket body or the cover member has an engaged portion that engages with an engaging portion provided on the lever side portion,
When locking the cover member in the closed state, the lock lever is rotated in the closing direction, and after opening the pair of lever side portions outward against the biasing force of the biasing means, The electrical component socket is configured such that the engaging portion is engaged with the engaged portion by being closed inward by the biasing means. The lock lever is held movably in a direction in which the tip side of the pair of lever side portions opens outward with respect to the lever tip portion, and the tip side of the lever side portion Having the biasing means for biasing toward the lever tip,
When the cover member is locked in the closed state, the lock lever is rotated in the closing direction, and the distal end side of the pair of lever side portions is opposed to the biasing force of the biasing means. 2. The structure according to claim 1, wherein the engaging portion is configured to engage with the engaged portion by opening outward and then closing inward by the biasing means. Socket for electrical parts.

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