JP2010073515A - Socket for electrical component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the operability by gradually reducing operating force applied to an operating member for opening and closing toward the last period although it is strong in the initial period, while securing pressing force of an opening and closing member to press down an electrical component housed in a housing part. <P>SOLUTION: An opening and closing support mechanism 40, which supports a pressing part 39 to press down the electrical component housed in the housing part of a socket body 30 so that it can be opened and closed, includes a spring 11, stretched in parallel, in between the socket body 30 and the operating member 33 paralleled face to face and disposed so that they can come close to and separate from each other; a linking mechanism, combined with the socket body and the operating member, while elastically holding the spring between the socket body and the operating member; and a stopper member 13 to keep the spring 11 held by the linking mechanism, in a state in which it is compressed by a prescribed amount in its initial state. The reaction force of the spring 11 applied to the operating member 33 is transmitted to the socket body and the operating member via the link mechanism to open and close the pressing part 39. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrical component socket in which an electrical component such as an IC package is detachably accommodated in a housing portion of a socket body and connected to a circuit board, and more specifically, an open / close member for holding the electrical component accommodated in the housing portion. A socket for an electrical component that can improve the operability of opening and closing by ensuring the pressing force and the operating force applied to the operating member for opening and closing the opening and closing member being initially large but gradually decreasing toward the end. It is.

Conventionally, an IC socket used to connect an electrical component such as an IC package to a circuit board, a pedestal on which the electrical component is mounted, a socket body to which the pedestal is attached, and movable up and down with respect to the socket body A cover member, a pressurizing mechanism for pressing and holding the electrical component mounted on the pedestal, and a plurality of contacts connected to the electrical component. The pressurizing mechanism includes a pressurizing lever that is rotatably supported with respect to the socket main body, and the socket main body includes two or four press levers arranged to push up the cover member. A coil spring was provided (see, for example, Patent Document 1).
JP 2003-332010 A

  When the socket main body and cover member of the IC socket are illustrated, as shown in FIG. 16, a cover member 2 is disposed above the socket main body 1 so as to be movable up and down, and two coils, for example, are provided at both ends between the two. The springs 3a and 3b are provided, and the cover member 2 is pushed up by the coil springs 3a and 3b. The cover member 2 is pushed down against the elastic force of the coil springs 3a and 3b to operate a pressure lever of a pressure mechanism (not shown).

  However, in the configuration of the conventional socket body and cover member, when the operating force F is applied as indicated by the arrow from the top to the bottom of the cover member 2 with the socket body 1 mounted on the circuit board 4, the cover member 2 Is lowered and the coil springs 3a and 3b contract, and an upward reaction force R is generated from the coil springs 3a and 3b as indicated by arrows. At this time, since the coil springs 3a and 3b are directly coupled between the socket body 1 and the cover member 2 in a state perpendicular to them, the downward operating force F on the cover member 2 and the coil springs 3a, 3b, It was in a state where the reaction force R of 3b was opposed to each other in the opposite direction.

  In such a state, as the cover member 2 is pushed, the reaction force R of the coil springs 3a, 3b increases as the cover member 2 is pushed, and when the cover member 2 is released, the reaction force R of the coil springs 3a, 3b becomes smaller. In this case, the operating force F applied to the cover member 2 increases as the cover member 2 is pushed down, and the operating force F applied to the cover member 2 decreases as the cover member 2 is raised. In other words, in the operation of mounting the electrical component on the pedestal of the socket body 1, the operation force F is small at the initial stage of pressing down the cover member 2, and the operation feeling is light. The operation force F was increased, and the operation feeling was heavy. Therefore, the operability as a whole was poor.

  Further, the cover member 2 is lifted in a state where the electrical component is mounted on the base of the socket body 1 and the electrical component is held by the pressure lever of the pressure mechanism, but the coil springs 3a and 3b are increased as the cover member 2 is lifted. Since the reaction force R is small, the pressing and holding of the electrical component by the pressurizing mechanism is weakened.

  Therefore, the present invention addresses such problems and secures the pressing force of the opening / closing member that presses the electrical component housed in the housing portion of the socket body, and the operating force applied to the operating member that opens / closes the opening / closing member. An object of the present invention is to provide a socket for an electrical component that can improve the operability of opening and closing by gradually reducing the size toward the end but gradually.

  In order to achieve the above object, a socket for an electrical component according to the present invention is provided with a plurality of contact pins that are separated from and connected to connection terminals of the electrical component on a socket body that houses the electrical component, and the socket. An electrical component socket having an opening / closing member for holding the electrical component housed in the housing portion of the main body, wherein the operation member for opening / closing the opening / closing member is arranged to be movable up and down with respect to the socket body, The opening / closing member includes a pressing portion that presses the electrical component housed in the housing portion, and an opening / closing support mechanism that supports the pressing portion so as to be freely opened and closed. The opening / closing support mechanism is opposed to the parallel state. Between the socket body and the operating member, which are arranged so as to be relatively close to or separated from each other, and a spring stretched in parallel with the socket body and the operating member. A link mechanism that is held in a telescopic manner and is coupled to the socket body and the operation member, and a stopper member that maintains the spring held by the link mechanism in a compressed state by a predetermined amount in an initial state. The pressing portion is configured to open and close by transmitting a reaction force of the spring due to an operating force applied to the socket body or the operation member to the socket body and the operation member via the link mechanism. .

  With such a configuration, the opening / closing member that includes the pressing portion that presses the electrical component housed in the housing portion of the socket body and the opening / closing support mechanism that supports the pressing portion so as to be openable / closable can be accommodated in the housing portion. The socket body and the operation member are arranged between the socket body and the operation member which are arranged so as to be opposed to each other and relatively close to or away from each other. The link mechanism coupled between the members is held so as to be extendable and contracted, and the spring held by the link mechanism is initially compressed by a predetermined amount by a stopper member, and the socket body or the operation member The opening / closing support mechanism transmits the reaction force of the spring due to the operating force applied to the socket body and the operating member via the link mechanism. To open and close the part. As a result, the pressing force of the opening / closing member that holds the electrical component housed in the housing portion of the socket body is ensured, and the operating force applied to the operating member that opens and closes the opening / closing member is initially large but gradually decreases toward the end. To improve the operability of opening and closing.

  Moreover, the said press part is a heat sink which contacts the electrical component accommodated in the said accommodating part, and thermally radiates this electrical component. Thereby, the heat sink as a pressing part contacts the electric component accommodated in the accommodating part, and thermally radiates this electric component.

  Further, the spring of the opening / closing support mechanism is a coil spring. Accordingly, the coil spring is stretched in parallel between the socket body and the operation member.

  Furthermore, an expandable core member may be inserted into the central shaft portion of the coil spring, and the coil spring may be coupled to the link mechanism via the core member. Accordingly, the coil spring can be stretched while being maintained parallel to the socket body and the operation member.

  Further, the link mechanism of the opening / closing support mechanism includes four levers for coupling both end portions of the spring to the socket body and the operation member, respectively. Thus, the spring is held between the socket body and the operation member so as to be extendable and contracted by a structure including four levers for coupling both ends of the spring to the socket body and the operation member, respectively.

  Further, the link mechanism of the opening / closing support mechanism includes two levers for fixing one end of the spring to either the socket body or the operation member and coupling the other end of the spring to the socket body and the operation member. ing. As a result, one end of the spring is fixed to either the socket main body or the operating member, and the spring is connected to the socket main body and the operating member by a structure including two levers for connecting the other end of the spring to the socket main body and the operating member. It is held between the socket body and the operation member so as to be extendable and contractible.

  According to the first aspect of the present invention, the opening / closing member includes a pressing portion that presses the electrical component housed in the housing portion of the socket body, and an opening / closing support mechanism that supports the pressing portion so as to be freely opened and closed. A spring stretched in parallel between the socket main body and the operating member, which is arranged so as to oppose the electric parts housed in the housing portion and are opposed to each other in a parallel state and relatively approach or separate from each other, is described above. A link mechanism coupled between the socket body and the operation member is held so as to be extendable and contracted, and the spring held by the link mechanism is maintained in a state compressed by a predetermined amount by a stopper member in the initial state. An opening / closing support mechanism that transmits a reaction force of the spring due to an operation force applied to the main body or the operation member to the socket body and the operation member via the link mechanism, It is possible to open and close the serial pressing portion. As a result, the pressing force of the opening / closing member that holds the electrical component housed in the housing portion of the socket body is ensured, and the operating force applied to the operating member that opens and closes the opening / closing member is initially large but gradually decreases toward the end. can do. Further, the vertical component of the reaction force of the spring received by the socket body and the operation member can be sequentially reduced in the direction in which the two members approach from the separated state, and sequentially increased in the direction in which the two members separate from the approached state. Therefore, the operation feeling when the operation force is applied between the two members to relatively approach or separate from each other is opposite to the conventional one, and the operability as a whole can be improved.

  According to the second aspect of the present invention, the pressing portion is a heat sink that abuts on the electrical component housed in the housing portion and radiates heat from the electrical component, so that the heat sink as the pressing portion is the housing portion. The electrical component can be dissipated by contacting the electrical component housed in the housing. Therefore, it is possible to prevent an excessive temperature rise of the electrical component.

  According to the third aspect of the present invention, the spring of the opening / closing support mechanism is formed of a coil spring, so that the coil spring can be stretched in parallel between the socket body and the operation member. Therefore, by disposing a substantially columnar coil spring between the socket body and the operation member, the socket body and the operation member can be brought close to contact with each other.

  Furthermore, according to the invention which concerns on Claim 4, the core member which can be expanded-contracted is inserted in the center axis | shaft part of a coil spring, The said coil spring is couple | bonded with a link mechanism via this core member, The said coil spring Can be stretched between the socket main body and the operation member while maintaining a rod shape parallel to them. Also in this case, by arranging a substantially cylindrical coil spring between the socket main body and the operation member, it can be brought close to the extent that the opposing surfaces of the socket main body and the operation member abut.

  According to a fifth aspect of the present invention, the link mechanism of the opening / closing support mechanism includes four levers that respectively connect both end portions of the spring to the socket main body and the operation member, whereby both ends of the spring are provided. The spring can be held between the socket main body and the operation member so as to be extendable and contractable by a structure including four levers that respectively couple the portion to the socket main body and the operation member. As a result, the link mechanism of the opening / closing support mechanism operates symmetrically at both ends of the spring.

  According to the invention of claim 6, the link mechanism of the opening / closing support mechanism fixes one end of the spring to either the socket body or the operation member, and the other end of the spring to the socket body and the operation member. Provided with two levers that are coupled to the socket, one end of the spring is fixed to either the socket body or the operating member, and the other end of the spring is coupled to the socket body and the operating member. With the structure including the lever, the spring can be held between the socket body and the operation member so as to be extendable and contractible. Thereby, the number of levers of the link mechanism of the opening / closing support mechanism can be reduced.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a plan view showing an embodiment of an electrical component socket according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a perspective view of FIG. This socket for electrical components is an open-top type socket, for example, which is an open top type socket that detachably accommodates an electrical component such as an IC package in a housing portion of the socket body and is connected to a circuit board such as a printed wiring board. A contact pin 31 (see FIG. 5), an opening / closing member 32, and an operation member 33.

  The socket body 30 detachably accommodates and positions an IC package 34 (see FIG. 5) as an electrical component, and has a housing portion 35 (FIGS. 4 and 4) that accommodates the IC package 34 on the upper surface by a conventionally known structure. (See FIG. 5). As shown in FIG. 5, a large number of contact pins 31 are arranged in the socket body 30. The contact pin 31 electrically connects the connection terminal on the lower surface of the IC package 34 and the circuit board, and is made of a conventionally known elongated plate material having springiness and excellent conductivity, and has a contact portion at the tip thereof. The connection to the connection terminal of the IC package 34 is possible.

  As shown in FIG. 5, the socket main body 30 is disposed on the upper side of the base portion 36 on which a large number of contact pins 31 that are in contact with the connection terminals on the lower surface of the IC package 34 are disposed. And a floating plate 37.

  Further, as shown in FIGS. 3 and 4, the socket body 30 has a pair of opening and closing members 32 and 32 for pressing the upper surface of the IC package 34 shown in FIG. A rectangular frame-shaped operation member 33 that opens and closes the opening / closing member 32 is provided so as to freely move up and down, while being provided so as to be rotatable about a support shaft at the end.

  As shown in FIG. 4, the pair of opening / closing members 32, 32 are provided so as to be rotatable so-called double-spanning, and each opening / closing member 32 serves as a “pressing portion” on the base plate 38 as shown in FIG. 5. A heat sink 39 is attached, and the heat sink 39 is supported on the socket body 30 so as to be freely opened and closed by an opening / closing support mechanism 40 (see FIGS. 2 and 3). The heat sink 39 is configured to be displaced from a pressing position (see FIG. 3) for pressing the upper surface of the IC package 34 shown in FIG. 5 in the housing portion 35 to a retracted position (see FIG. 4). ing. In this case, one opening / closing support mechanism 40 is provided on each of the front side and the back side of the socket body 30 in FIG. 3, and exhibits or transmits an operating force when opening and closing the heat sink 39 as a pressing portion. The force is transmitted to the heat sink 39 via a conventionally known opening / closing link mechanism 41 provided in pairs on both sides of the heat sink 39 as shown in FIG.

  The heat sink 39 abuts on an electrical component (IC package 34) housed in the housing portion 35 and radiates heat from the IC package 34. Specifically, the heat sink 39 is made of, for example, aluminum die cast and has good thermal conductivity. A large number of heat radiating elements are formed on one surface side (lower surface side) so as to contact the upper surface of the IC package 34 and efficiently radiate heat on the other surface side (upper surface side). Fins are formed.

  As shown in FIGS. 3 and 4, the operation member 33 opens and closes the opening / closing member 32. The operation member 33 is formed in a rectangular frame shape having an opening large enough to insert the IC package 34. It can be moved up and down. When the operation member 33 is lowered from the top dead center position, the opening / closing support mechanism 40 shown in FIGS. 2 and 3 exerts or transmits the operation force, and the opening / closing link mechanism 41 performs a conventionally known operation in FIG. The base plate 38 and the heat sink 39 shown rotate and open upward (see FIG. 5).

  FIG. 6 is a cross-sectional explanatory view showing the structure of the opening / closing support mechanism 40 provided on the front side and the back side between the socket body 30 and the operation member 33 in FIG. It is a figure which shows the state before adding. FIG. 7 is an explanatory cross-sectional view showing a state of the opening / closing support mechanism 40 when an operating force is applied to the operating member 33. FIG. 8 is an explanatory cross-sectional view showing a state of the opening / closing support mechanism 40 when an operation force is further applied to the operation member 33.

  Here, the opening / closing support mechanism 40 is arranged between the socket main body 30 and the operation member 33 that are opposed to each other in parallel and are relatively close to or separated from each other, and the spring 11 that is stretched in parallel to them. The spring 11 is held between the socket body 30 and the operation member 33 so as to be stretchable and coupled to the socket body 30 and the operation member 33, and the spring 11 held by the link mechanism is in the initial state. And a stopper member 13 that maintains a compressed state by a predetermined amount. The reaction force of the spring 11 due to the operation force applied to the socket body 30 or the operation member 33 is applied to the socket body 30 and the operation member 33 via the link mechanism. By transmitting, the pressing portion (heat sink 39) is configured to open and close.

  Hereinafter, the detailed structure and operation of the opening / closing support mechanism 40 will be described with reference to FIGS. FIG. 9 is a front view showing an embodiment of the opening / closing support mechanism 40, and FIG. 10 is a sectional view taken along line XX of FIG. This open / close support mechanism 40 converts a spring reaction force generated when a spring is interposed between two opposed members and an operating force is applied between the two members to relatively approach or separate them. The socket main body 30 and the operation member 33, the spring 11, the core member 12, the link mechanism (16a, 16b, 16c, 16d), and the stopper member 13 are provided.

  The socket body 30 and the operation member 33 are the main parts of the opening / closing support mechanism 40. The socket body 30 is installed on the circuit board 14, and the operation member 33 is disposed above the socket body 30. The socket body 30 and the operation member 33 are opposed to each other in a parallel state, and are disposed so as to be relatively close to each other or separated by a spring 11 and a link mechanism described later.

  A spring 11 is stretched between the socket body 30 and the operation member 33 by a link mechanism described later. The spring 11 urges the socket body 30 and the operation member 33 so as to be relatively separated from each other. For example, the spring 11 includes a coil spring having a predetermined length, and is parallel to the socket body 30 and the operation member 33. It is stretched. And the core member 12 of predetermined length is inserted in the space of the center axis | shaft part of the spring 11 which consists of coil springs. The core member 12 is configured such that a rod 12b is telescopically combined with a cylindrical tubular member 12a so that the core member 12 can expand and contract in the longitudinal direction. In addition, by inserting the core member 12 into the central shaft portion of the spring 11, the spring 11 can be extended and contracted while being maintained in a rod shape.

  A link mechanism is provided between the socket body 30 and the operation member 33 and the spring 11. In this link mechanism, the spring 11 is held between the socket body 30 and the operation member 33 so as to extend and contract in a state parallel to them, and is coupled to the socket body 30 and the operation member 33. In addition, the first lever 16a and the second lever 16b of a predetermined length that are rotatably supported by the support shafts 15a and 15b in the vicinity of both ends of the rear side surface, and in the vicinity of both ends of the front side surface and the rear side surface of the operating member 33 A third lever 16c and a fourth lever 16d having a predetermined length are rotatably supported by the support shafts 15c and 15d. The other ends of the first lever 16a and the third lever 16c are pivotally coupled to one end of the spring 11 by a pin 17a, and the other ends of the second lever 16b and the fourth lever 16d are pins. The other end side of the spring 11 is rotatably coupled by 17b. That is, as shown in FIG. 10, the link mechanism (16a, 16b, 16c, 16d) and the spring 11 are provided on the front side surface of the socket body 30 and the operation member 33, and also on the rear side surface of the socket body 30 and the operation member 33. A link mechanism (16a ′, 16b ′, 16c ′, 16d ′) and a spring 11 ′ are provided. In this case, the springs 11 and 11 ′ are incorporated so as not to hit the socket body 30 and the operation member 33.

  The spring 11 and the core member 12 are assembled in such a manner that one end of the spring 11 is brought into contact with the step formed on the left end of the cylindrical member 12a in FIG. 9 and is nested in the cylindrical member 12a. The other end portion of the spring 11 is brought into contact with an end plate 18 provided at the right end portion of the combined rod 12 b, and the spring 11 is mounted on the outer peripheral surface of the core member 12. In this state, the other end portions of the first lever 16a and the third lever 16c are coupled to the left end portion of the cylindrical member 12a by the pin 17a, and the second lever is coupled to the end plate 18 at the right end portion of the rod 12b by the pin 17b. The other end of 16b and the fourth lever 16d are coupled. With such a structure, the spring 11 made of a coil spring is coupled to the link mechanism (16a, 16b, 16c, 16d) via the core member 12.

  As shown in FIG. 9, stopper members 13 are provided at both end portions between the socket body 30 and the operation member 33. The stopper member 13 maintains the spring 11 held by the link mechanism (16a, 16b, 16c, 16d) in a compressed state by a predetermined amount in the initial state. For example, the stopper member 13 is attached to the upper end of a round bar having a predetermined length. It is formed in a rivet shape with a head 19. Then, the lower end of the stopper member 13 is fixed to the socket body 30, and the upper end of the stopper member 13 passes through the through hole at the bottom of the recess 20 having a predetermined depth formed in the thickness of the operation member 33, and the upper end head 19 is The bottom of the recess 20 is engaged. As a result, the operation member 33 can be moved up and down along the stopper member 13 as indicated by arrows A and B shown in FIG.

  In this case, the distance from the lower end of the stopper member 13 to the head 19 is maintained in a state in which the spring 11 is compressed by a predetermined amount in the initial state. It is determined to be in a state where it is lowered only. Accordingly, the first lever 16a and the third lever 16c, and the second lever 16b and the fourth lever 16d are in a state of being folded into a shallow “U” shape inward in the initial state (see FIG. 6). A predetermined amount of reaction force is generated in parallel to the socket body 30 and the operation member 33 from the spring 11.

In the state configured as described above, in FIG. 9, when an operation force F ₀ is applied downward as indicated by an arrow from the upper surface of the operation member 33, the operation member 33 is lowered in the direction of the arrow B and the link mechanism (16 a , 16b, 16c, 16d), the spring 11 is contracted, and the reaction force of the spring 11 due to the operating force F ₀ applied to the operating member 33 is socketed via the link mechanism (16a, 16b, 16c, 16d). This is transmitted to the main body 30 and the operation member 33.

When the operating force F ₀ is further applied to the operating member 33 from the state of FIG. 9, the operating member 33 descends in the direction of arrow B as shown in FIG. 11, and the link mechanism (16a, 16b, 16c, 16d) is moved. The spring 11 is shrunk through. At this time, the first lever 16a and the third lever 16c, as well as the second lever 16b and the fourth lever 16d are in a state of being greatly folded inwardly in a “U” shape (see FIG. 7), and from the spring 11 Produces a larger reaction force than in the case of FIG.

Then, when the operation force F ₀ is further applied to the operation member 33 from the state of FIG. 11, the operation member 33 is further lowered in the direction of arrow B as shown in FIG. 12, and the link mechanisms (16a, 16b, 16c, The spring 11 is further contracted via 16d). At this time, the bottom surface of the operation member 33 finally comes into contact with the top surface of the socket body 30 (see FIG. 8), and the first lever 16a and the third lever 16c, and the second lever 16b and the fourth lever 16d are further The spring 11 is folded into a “U” shape, and a larger reaction force is generated from the spring 11 than in the case of FIG. 11. In this state, the head portion 19 of the stopper member 13 protrudes upward from the upper surface of the operation member 33.

Thereafter, when the operating force F ₀ applied to the operating member 33 is loosened or released from the state shown in FIG. 12, the reaction force of the spring 11 causes the link mechanism (16a, 16b, 16c, 16d) to pass through as shown in FIG. Thus, the operating member 33 is raised in the direction of arrow A and restored to the original state. At this time, the head 19 of the stopper member 13 engages with the bottom of the recess 20 of the operation member 33, and the operation member 33 is stopped with the operation member 33 lowered by a predetermined amount in the arrow B direction with respect to the socket body 30. Therefore, the spring 11 is maintained in a compressed state by a predetermined amount, and a predetermined amount of reaction force is generated from the spring 11.

Next, the relationship between the operating force F ₀ applied to the socket body 30 or the operating member 33 and the reaction force of the spring 11 in the opening / closing support mechanism 40 configured as described above will be described with reference to FIG. In FIG. 13, in order to simplify the drawing, each constituent member is represented by a straight solid line, and a support shaft or a pin is represented by a black circle. Similarly to FIG. 9, the socket body 30 is in a fixed state, and the operation member 33 is lowered or raised with respect to the socket body 30.

In FIG. 13, a downward operating force F ₀ is applied to the center of the upper surface of the operating member 33. The operating force F ₀ is transmitted to the spring 11 via the link mechanism (16a, 16b, 16c, 16d), and the spring 11 is contracted. Here, focusing on the third lever 16 c connected to one pin 17 a of the spring 11 as a representative, the force that acts on the support shaft 15 c coupled to the operation member 33 is obtained. First, the spring constant of the spring 11 and k, when the Tizimi amount is x, the reaction force of the spring acting on one of the pins 17a and F _1,
F ₁ = kx (1)
It is represented by

As described above, in the state where the reaction force F ₁ is generated from the spring 11, the reaction force F ₁ of the spring 11 at the position of the one pin 17a is along the component force along the third lever 16c and the first lever 16a. Divided into components. Here, a component force along the first lever 16a, the component force along the third lever 16c, forms a parallelogram, a component force along the third lever 16c and F _2. The angle formed by the component force F ₂ along the third lever 16 c and the spring reaction force F ₁ acting on the extension line of the spring 11 is defined as θ. Now, the position of the pin 17a to a point P, and the position indicating the magnitude of the component force F ₂ along the third lever 16c to a point Q, the perpendicular drawn from the point Q to the line representing the reaction force F ₁ of the spring When the position of the foot and the point R, the _{△ PQR, PQ = F 2,} PR = F 1/2, since it is ∠QPR = θ,
_{F 2 = (F 1/2} ) / cosθ ... (2)
It is represented by

The component force F ₂ represented by the formula (2) is transmitted as it is to the support shaft 15c that is the intersection with the operation member 33 through the third lever 16c. In this case, the direction of the reaction force F ₁ of the spring is parallel to the operation member 33, and the component force F ₂ along the third lever 16c intersects the operation member 33 at an angle θ. Only the component force F ₂ works in the angle θ direction. The upward component perpendicular to the operation member 33 of the component force F ₂ is defined as F ₃ . Here, when the upward component F ₃ is obtained in a triangle having the support shaft 15c as one vertex,
F ₃ = F ₂ · sin θ (3)
It becomes. Substituting the above equation (2) into this equation (3),
_{F 3 = (F 1/2} ) tanθ ... (4)
It becomes.

This expression (4) represents the magnitude of the upward force F ₃ acting on the point of the support shaft 15c to which the third lever 16c is coupled when the downward operation force F ₀ is applied to the upper surface of the operation member 33. ing. Such a force is similarly applied to the points of the other support shafts 15a, 15b, and 15d (a downward force is applied to the points of the support shafts 15a and 15b). According to the equation (4), the upward force F ₃ is proportional to the spring reaction force F ₁ and tan θ. If the reaction force F ₁ of the spring does not change so much, the upward force F ₃ decreases as the angle θ decreases, and the upward force F ₃ increases as the angle θ increases. Become. Therefore, when a downward operating force F ₀ is applied to the upper surface of the operating member 33 and pushed down, the operating force F ₀ can be made to gradually decrease toward the end, though it is large at the initial stage of the pushing down. . In other words, the upward component F ₃ caused by the spring reaction force F ₁ received by the operation member 33 is gradually reduced in the direction in which the socket body 30 and the operation member 33 approach from the separated state, and in the direction in which the socket member 30 is separated from the approach state. The size can be increased sequentially.

  FIG. 14 is a front view showing a second embodiment of the opening / closing support mechanism 40. In this embodiment, the first stopper 16 that restricts the movement of the first lever 16 a and the second lever 16 b without providing the recess 20 formed in the stopper member 13 and the operation member 33 rising from the socket body 30 shown in FIG. 9. A piece 21a and a second stopper piece 21b are provided, and a third stopper piece 21c and a fourth stopper piece 21d for restricting the movement of the third lever 16c and the fourth lever 16d are provided. In this case, the first stopper piece 21 a and the second stopper piece 21 b are attached to the socket body 30, and the third stopper piece 21 c and the fourth stopper piece 21 d are attached to the operation member 33. These stopper pieces 21a, 21b, 21c, and 21d are in a state in which the spring 11 held by the link mechanism (16a, 16b, 16c, 16d) is compressed by a predetermined amount in the initial state, as shown in FIG. The mounting angle is determined so as to be maintained, and the movement of the levers 16a, 16b, 16c, and 16d is restricted by contacting the outer side surfaces of the levers 16a, 16b, 16c, and 16d. Therefore, the first lever 16a and the third lever 16c, and the second lever 16b and the fourth lever 16d are in a state of being folded into a shallow “U” shape on the inner side in the initial state. A predetermined amount of reaction force is generated in parallel to the socket body 30 and the operation member 33.

  FIG. 15 is a front view showing a third embodiment of the opening / closing support mechanism 40. In this embodiment, a link mechanism that holds the spring 11 in an extendable manner between the socket main body 30 and the operation member 33 in FIG. 9, and as shown in FIG. 15, one end of the spring 11 is connected to the socket main body 30 or the operation member. It is provided with two levers 16a and 16c that are fixed to any one of 33 and the other end of the spring 11 is coupled to the socket body 30 and the operating member 33. FIG. 15A is a view in which the one end 22 side of the spring 11 is fixed to a fixing block 23 protruding to the lower surface side of the operation member 33. FIG. 15B is a view in which the one end 22 side of the spring 11 is fixed to a fixing block 24 protruding from the upper surface side of the socket body 30. In these cases, the structure of the link mechanism can be simplified.

  In the above description, the expandable core member 12 is inserted into the central shaft portion of the spring 11 made of a coil spring. However, the present invention is not limited to this, and the core member 12 may not be inserted. Further, although the spring 11 is made of a coil spring, it may be a spring having another shape and structure. Further, for example, in FIG. 9, the lengths of the respective levers constituting the link mechanism that holds the spring 11 so as to be extendable / reduced are the levers 16 a and 16 b that are connected to the socket body 30, and the levers 16 c and 16 d that are connected to the operation member 33. It may be different. For example, the length may be 1: 2 instead of 1: 1. In this case, the ratio of the force appearing on the socket body 30 side and the force appearing on the operation member 33 side can be changed.

It is a top view which shows embodiment of the socket for electrical components by this invention. It is a front view of FIG. FIG. 2 is a perspective view of FIG. 1. FIG. 4 is a perspective view showing a state in which a pressing portion (heat sink) of the opening / closing member is opened when FIG. 3 is viewed from the direction of arrow C. It is the DD sectional view taken on the line of FIG. FIG. 3 is a cross-sectional explanatory view showing the structure of an opening / closing support mechanism provided on the front side and the back side between the socket main body and the operation member in FIG. 2 and showing a state before a downward operation force is applied to the operation member. It is. FIG. 7 is an explanatory cross-sectional view showing a state of the opening / closing support mechanism when an operation force is applied to the operation member in FIG. 6. FIG. 8 is an explanatory cross-sectional view illustrating a state of the opening / closing support mechanism when an operation force is further applied to the operation member in FIG. 7. It is a front view which shows embodiment of an opening-and-closing support mechanism. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is explanatory drawing which shows the movement of the link mechanism of an opening-and-closing support mechanism at the time of applying an operating force to an operation member, and the contracted state of a spring. It is explanatory drawing which shows the movement of the link mechanism of an opening-and-closing support mechanism at the time of further applying operating force to an operation member, and the contracted state of a spring. It is explanatory drawing which shows the relationship between the operating force applied to an operating member, and the reaction force of a spring. It is a front view which shows 2nd Embodiment of the said opening / closing support mechanism. It is a front view which shows 3rd Embodiment of the said opening / closing support mechanism. It is a schematic explanatory drawing which shows the socket main body and cover member of the conventional IC socket.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Spring 12 ... Core member 13 ... Stopper member 16a, 16b, 16c, 16d ... Lever 19 ... Head part of stopper member 20 ... Recessed part formed in operation member 21a, 21b, 21c, 21d ... Stopper piece 23 ... Operation member Fixing block protruding to the lower surface side of the socket 24... Fixing block protruding to the upper surface side of the socket body 30... Socket body 31... Contact pin 32.
35 ... Accommodating part 36 ... Base part 37 ... Floating plate 39 ... Heat sink (pressing part)
40. Opening / closing support mechanism

Claims (6)

The socket body that houses the electrical component is provided with a plurality of contact pins that are separated from and connected to the connection terminals of the electrical component, and has an opening and closing member that holds the electrical component housed in the housing portion of the socket body. The operation member for opening and closing the opening and closing member is an electrical component socket arranged to be movable up and down with respect to the socket body,
The opening / closing member includes a pressing portion that presses an electrical component housed in the housing portion, and an opening / closing support mechanism that supports the pressing portion so as to be freely opened and closed.
The opening / closing support mechanism includes a socket body and an operation member which are arranged so as to face each other in parallel and are relatively close to or separated from each other, and a spring stretched in parallel to the socket member. A link mechanism that is stretchably held between the main body and the operation member and coupled to the socket main body and the operation member, and the spring held by the link mechanism is maintained in a compressed state by a predetermined amount in an initial state. A stopper member, which opens and closes the pressing portion by transmitting a reaction force of the spring due to an operating force applied to the socket body or the operation member to the socket body and the operation member via the link mechanism. Configured as
A socket for electrical parts characterized by the above.   2. The electrical component socket according to claim 1, wherein the pressing portion is a heat sink that contacts the electrical component accommodated in the accommodating portion and radiates heat of the electrical component.   The electrical component socket according to claim 1 or 2, wherein the spring of the opening / closing support mechanism comprises a coil spring.   4. The socket for electrical parts according to claim 3, wherein a core member that can be expanded and contracted is inserted into a central shaft portion of the coil spring, and the coil spring is coupled to the link mechanism via the core member.   5. The link mechanism of the opening / closing support mechanism includes four levers for coupling both ends of the spring to the socket body and the operation member, respectively. 6. Socket for electrical parts.   The link mechanism of the opening / closing support mechanism includes two levers for fixing one end of the spring to either the socket body or the operation member and coupling the other end of the spring to the socket body and the operation member. The socket for electrical parts according to any one of claims 1 to 4, wherein the socket is for electrical parts.

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