JP2009049268A - Component installing tool and component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component installing tool capable of preventing a component from being fixed by soldering while floating over a circuit board to cause a mounting defect or engagement defect. <P>SOLUTION: The component installing tool 100a is inserted into a through hole 106 formed in a first surface St of the circuit board 103 and a second surface Sb opposed to the first surface St to fit the component onto the first surface St. The component installing tool 100a includes: a friction imparting member 102a which is elastically pressed against an internal wall surface 107 of the circuit board 103 which forms the through hole 106 to generate frictional force with the internal wall surface 107; a fall preventive member 101 opposed to the second surface Sb of the circuit board 103; and an abutting member 104a which abuts on the first surface St of the circuit board 103 to restrict the position of the friction imparting member 102 on the internal wall surface 107 and the position of the fall preventive member 101 with respect to the second surface Sb. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a component mounting tool for temporarily fixing a component to a circuit board and a component provided with the mounting tool, and more particularly to a component mounting tool for preventing the component from floating or tilting from the circuit board.

  In recent years, in electronic products for various applications, functional parts called modules or units that combine several types of electronic circuits are often used to easily realize various functions and specifications. It has become. Such functional parts are mounted on the circuit board for temporary fixing, and then soldered by dipping or the like. The functional component may float or tilt from the circuit board between the temporary fixing and the soldering. This float and inclination may adversely affect the fitting of parts.

  As a means for preventing such components from floating and tilting, there is known a method in which a terminal inserted into a hole provided in a circuit board is deformed and clinched to the circuit board. However, functional parts called units and modules are relatively large in shape and often have different shapes. Therefore, it is difficult to clinch the terminal inserted into the hole of the circuit board.

  It is also conventionally known to provide a claw that hooks on the back of the circuit board on the terminal of the component as a means for preventing the component from floating or tilting. As an example of a part in which a part terminal is provided with a claw for preventing dropping, a configuration in which a terminal board is provided with a plurality of claws (FIG. 12, hereinafter “Prior Art 1”) has been proposed (see, for example, Patent Document 1). . In addition to the component terminals, there is also a configuration in which a component fixture for the purpose of mounting the component on the circuit board and preventing the component from falling off is provided at the lower end of the functional component (FIG. 13, hereinafter “Prior Art 2”). Are known.

  FIG. 12 shows a terminal board 202 of the prior art 1 described in Patent Document 1. A terminal board 202 attached to a component main body (not shown) is inserted into a hole 206 provided in the circuit board 203. The terminal plate 202 is provided with a plurality of protrusions (drop-off preventing members 201a and 201b) in order to prevent the terminal plate 202 from coming out of the hole 206.

  The drop-off prevention members 201a and 201b correspond to the circuit boards 103 having different thicknesses (plate thicknesses W1 and W2, indicated by solid lines and broken lines), respectively. In other words, the drop-off prevention member 201a hits the bottom surface of the circuit board 103 having the plate thickness W1, so that the terminal board 202 is prevented from falling out of the hole 206, and a component to which the terminal board 202 is attached is prevented from falling off from the circuit board 103. To do. Similarly, the drop-off prevention member 201b hits the bottom surface of the circuit board 103 having the plate thickness W2, thereby preventing the terminal board 202 and components from falling off the circuit board 103.

  Next, with reference to FIG. 13, a tuner unit will be described as an example of a functional component with respect to the configuration of the related art 2 in which a component fixture is provided at the lower end portion of the functional component. 13A and 13B are a front view and a side view of the tuner unit 301 mounted on the circuit board 203. FIG. FIG. 13C is a partially enlarged view showing a state in which the component fixture is attached to the circuit board 203 in FIG. FIG. 13D is a partially enlarged view showing a state in which the component fixture is attached to the circuit board 203 in FIG. In the figure, elements equivalent to those shown in FIG. 12 are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 13A and 13B, the tuner unit 301 includes an F-type plug 304, a case left lid 305, a case right lid 306, and a component frame 205. The F-type plug 304 is a terminal for connecting to an antenna cable (not shown). The case left lid 305 and the case right lid 306 are fitted to the component frame 205. The case left lid 305 and the case right lid 306 protect and shield the tuner unit 301.

  Two component fixtures 200 are provided opposite to each other at both ends of the lower end portion of the component frame 205. The component fixture 200 is inserted into a through hole 206 provided in the circuit board 203 to temporarily fix the component fixture 200 on the circuit board 203. A plurality of terminal legs 209 are further provided between the two component attachments 200 at the lower end of the component frame 205. A terminal leg 209 is a part of the tuner unit 301 and is input via the F-type plug 304 and outputs an electrical signal processed inside the tuner unit 301 to the circuit of the circuit board 103. The terminal leg 209 is electrically connected to the circuit board 203.

  As shown in FIG. 13 (d), the component fixture 200 includes a fixture body 205a, insertion legs 208a, 208b, a drop-off prevention member 201, and an abutting member 204a. The fixture main body 205 a is formed integrally with the component frame 205 at the lower end of the component frame 205. A contact portion 210 that contacts the circuit board 203 and places the component frame 205 on the circuit board 203 is formed below the fixture body 205a.

  A pair of insertion legs 208a and 208b are provided at the lower part of the fixture main body 205a with the abutting portion 210 interposed therebetween. A drop prevention member 201 and a contact member 204a are provided on the insertion foot 208a, and a drop prevention member 201 is provided on the insertion foot 208b. The contact member 204 a determines the insertion depth of the insertion foot 208 a into the hole 206, and has a function of placing the component frame 205 on the circuit board 203, similar to the contact portion 210. The contact member 204 a extends in a direction substantially perpendicular to the insertion direction Di of the insertion foot 208, and its lower surface is on an extension line of the lower surface of the contact portion 210.

As shown in FIG. 13C, the component frame 205 (tuner unit 301) is placed on the circuit board 203 by inserting the insertion legs 208 a and 208 b into the holes 206 provided in the circuit board 203. The insertion legs 208a and 208b are respectively inserted into the two holes 206 provided in the circuit board 203, and the contact portion 210 and the contact member 204a come into contact with the circuit board 203, so that the tuner unit 301 is in a stable state. It is placed on the substrate 203. Further, the insertion depth of the insertion foot 208 with respect to the hole 206 is determined. In this state, the drop prevention member 201 is fitted to the circuit board 203 to prevent the component frame 205 from dropping from the circuit board 203.
Japanese Utility Model Publication No. 61-51773

  Next, problems in the above-described prior art will be described. The drop-off prevention members 201a and 201b of the prior art 1 (FIG. 12) are provided corresponding to a plurality of types of circuit boards having different plate thicknesses, but are not means for dealing with the floating and inclination of components. The terminal plate 208 is elastically deformed when the thin plate thickness preventing member 201b for the thin plate thickness (W1) comes into contact with the inner wall surface 207 of the hole 206, and the thin plate thickness preventing member 201a for the thick plate thickness (W2) is inside the hole 206. It may be located inside the wall surface 207. In this case, the drop-off prevention member 201a does not hit the bottom surface of the circuit board 103, and thus does not serve as a drop-off prevention member.

  Furthermore, both the drop-off prevention member 201a and the drop-off prevention member 201b are intended to prevent the terminal board 208 from dropping out of the hole 206, and are not intended to prevent floating or tilting that occurs before component mounting. There is also no provision that requires such consideration. For this reason, there is a problem that the component floats or tilts before mounting, resulting in a mounting failure or a component fitting failure problem after mounting.

  Next, with reference to FIG. 14, the problem in the prior art 2 (FIG. 13) is demonstrated concretely. FIG. 14A shows a state of the component fixture 200 before the tuner unit 301 is tilted, and FIG. 14A shows a state of the component fixture 200 after the tuner unit 301 is tilted. FIG. 14C shows the amount of displacement of the F-type plug 304 when the tuner unit 301 is tilted.

  The clearance V shown in FIG. 14A is a gap necessary for the elastic drop-off prevention member 201 to be reliably elastically restored after the insertion foot 208 is inserted into the circuit board 203. If the amount of the clearance V is insufficient, the drop-off prevention member 201 does not completely pass through the hole 206 due to processing variations of the drop-off prevention member 201, dimensional variation of the circuit board 203, temperature and humidity, and other conditions, and hinders elastic recovery. It becomes. On the other hand, if the clearance V is excessively large, the fitting between the circuit board 203 and the insertion leg 208 becomes unstable. As a result, the possibility of the component frame 205 being lifted or tilted increases, and the amount of the component frame 205 increases, which causes problems such as poor fitting.

  When a lateral force (rightward in FIG. 14) is applied to the tuner unit 301 for some reason, the tuner unit 301 rotates around one insertion foot 208b until the clearance V at the insertion foot 208a becomes zero. Lean. A displacement amount H1 shown in FIG. 14C is a horizontal displacement amount of the F-type plug 304 when the tuner unit 301 is inclined by the inclination angle α. Reference numeral 304a indicates the position of the F-type plug 304 at the normal position. If the vertical line from the center of the F-type plug 304 at that time is the center line 308, the F-type plug 304 when the tuner unit 301 is tilted by the tilt angle α is at the position 304b. The center line 308 is displaced like the tilt center line 309.

  In the example shown in FIG. 13B, when shown by specific numerical values, the width dimension of the hole 206 is 4 mm, the width dimension of the insertion foot 208 is 3 mm, the width dimension of the component frame 205 is 13 mm, and the clearance V is 0.2 mm. When the width dimension of the drop-off prevention member 201 is 1 mm and the drop-off prevention member 201 is arranged at the center of the insertion foot 208, the inclination angle α is about 1.6 °. Further, when the distance between the center position of the F-type plug 304 and the circuit board 203 is 51.5 mm, the displacement H1 is about 1.4 mm. Since the positional dimensional tolerance of the connection terminal represented by the F-type plug shown in this example is generally about 0.5 mm, the displacement amount H1 is nearly three times that value.

  Providing a clearance V between the circuit board 203 and the drop-off prevention member 201 is necessary for reliably protruding the drop-off prevention member 201 from the hole 206. However, as described above, the clearance V causes the tuner unit 301 to float or tilt from the circuit board 203. In particular, when the position shift of the F-type plug 304 with respect to the circuit board 103 greatly exceeds the dimensional tolerance, poor fitting occurs when the tuner unit 301 is connected to an antenna cable or the like of a television receiver, and the production efficiency is lowered.

  Since the tuner unit 301 is placed in a stable state on the circuit board 103 by the pair of component attachments 200, the tuner unit 301 is superior to the configuration of the prior art 1 (FIG. 12) in that it prevents floating and tilting. However, when an external force is applied due to the clearance between the drop-off prevention member 201 and the circuit board, the tuner unit 301 easily tilts with respect to the circuit board 203. As a result, floating or tilting occurs. That is, the component fixture 200 has room for improvement as a means for preventing the component from floating or tilting before mounting, which causes a mounting defect or a poor fitting.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a component fixture that exhibits a sufficient function as means for preventing the component from floating or tilting from the substrate.

In order to achieve the above object, the component fixture according to the present invention is:
A component mounting tool that is inserted into a through-hole formed across a first surface of a circuit board and a second surface facing the first surface, and attaches the component onto the first surface,
A friction applying member that elastically presses against an inner wall surface of the circuit board that forms the through hole, and generates a friction force between the inner wall surface;
A drop-off prevention member facing the second surface;
A contact member that contacts the first surface and regulates a position of the friction applying member on the inner wall surface and a position of the drop-off preventing member with respect to the second surface;

Here, the contact member is substantially perpendicular to the insertion direction,
The friction applying member is provided on the opposite side of the contact member at an obtuse angle with respect to the insertion direction,
The drop-off prevention member is preferably provided on the same side as the contact member at an obtuse angle with respect to the insertion direction.

  Moreover, it is preferable that the said friction provision member presses the said inner wall surface with an edge. The friction force increases when the friction applying member moves in the direction opposite to the insertion direction.

  Here, the drop-off preventing member, the friction applying member, and the contact member may be integrally formed by sheet metal pressing. The friction applying member may have an obtuse angle with respect to the contact member, and the drop-off preventing member may be provided on the opposite side of the contact member with respect to the insertion direction.

  The friction applying member may be composed of an elastic part having toughness and a protrusion attached to the elastic part. Further, the friction applying member may be bent so as to approach the contact member with respect to an axis perpendicular to the insertion direction.

In order to achieve the above-mentioned object, other component fixtures according to the present invention are:
A component mounting tool that is inserted into a through-hole formed across a first surface of a circuit board and a second surface facing the first surface, and attaches the component onto the first surface,
A drop-off prevention member that elastically contacts the second surface;
A contact member that elastically contacts the first surface is provided.

  Here, it is preferable that the contact member is substantially perpendicular to the insertion direction, and the drop-off prevention member is provided on the opposite side of the contact member at an obtuse angle with respect to the insertion direction. The contact member and the drop-off preventing member may be integrally formed by sheet metal pressing.

  In addition, the present invention includes a component in which any of the above-described component fixtures is attached to each of the opposing positions of the lower end portion, and the component fixture is attached to each of the two through holes of the circuit board.

  By using the component mounting tool of the present invention, it is possible to prevent the component from floating or tilting due to its own weight, vibration, impact, or the like while the component is temporarily fixed to the circuit board.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals and the description thereof is omitted.

(Embodiment 1)
FIG. 1 shows the configuration of a component fixture according to Embodiment 1 of the present invention. FIG. 1 (a) shows a front view of the component fixture according to the present embodiment, and FIG. 1 (b) shows a side view. The component fixture 100a according to the present embodiment has a configuration similar to that of the component fixture 200 of the prior art 2 shown in FIG. 13 and faces the lower end portion of the component frame in the same manner as the component fixture 200. Attached and used.

  Specifically, the component mounting tool 100a includes a mounting tool main body 105a, a drop-off prevention member 101a, a contact member 104a, an insertion foot 108a, and an insertion foot 108j. The fixture main body 105 a is integrally formed with the component frame 105 at the lower end of the component frame 105. A contact portion 110 is formed in the lower part of the fixture main body 105 a so as to contact the circuit board 103 and place the component frame 105 on the circuit board 103.

  A pair of insertion feet 108a and 108j are provided at the left and right ends of the lower portion of the fixture body 105a. The insertion foot 108a and the insertion foot 108j are provided with dropout prevention members 101a and 101b, respectively, similarly to the dropout prevention members 201a and 201b in the insertion feet 208a and 208b. The insertion foot 108a is provided with a contact member 104a corresponding to the contact member 204a in the insertion foot 208a, and further provided with a friction applying member 102a. The component fixture 200 does not have a member corresponding to the friction applying member 102a.

  As shown in FIG. 1A, the drop-off prevention member 101a and the friction applying member 102a extend in directions that form obtuse angles θ1 and θ2 with respect to the insertion direction Di of the insertion foot 108a, respectively. The contact member 104a extends in a direction substantially perpendicular to the insertion direction Di of the insertion foot 108a, and its lower surface is on an extension line of the lower surface of the contact portion 110.

  Usually, the drop-off prevention members 101a and 101b, the friction applying member 102a, the contact member 104a, the component frame 105, and the insertion feet 108a and 108j are integrally formed by a sheet metal press.

  The circuit board 103 has a through-hole (hereinafter referred to as “hole”) defined by a rectangular parallelepiped inner wall surface 107 extending over the mounting surface St on which the component is mounted and the non-mounting surface Sb opposite to the mounting surface St. (Abbreviation) 106 is formed in a predetermined number. As described above, in this example, the insertion foot 108a and the insertion foot 108j are inserted into the holes 106 from the placement surface St side, and the component is placed on the circuit board 103 (mounting surface St). .

  At this time, the abutting member 104a abuts on the placement surface St, the posture of the component fixture 100a is restricted, the distance from the placement surface St to the tip of the friction applying member 102a, and the placement surface St. To the tip of the drop-off prevention member 101a is regulated. That is, the contact member 104a positions the tip of the friction applying member 102a between the placement surface St and the non-mounting surface Sb, and moves the tip of the drop-off prevention member 101a from the hole 106 to the non-mounting surface Sb side. It also has a function of protruding.

  In this state, the tip of the friction applying member 102a is in pressure contact with the inner wall surface 107 of the circuit board 103 forming the hole 106, and a frictional force is generated between the inner wall surface 107 and the inner wall surface 107 by elastic deformation. This frictional force prevents the component fixture 100 a inserted into the hole 106 from being displaced or tilted with respect to the circuit board 103.

  As described above, the component fixture 100a according to the present embodiment is similar to the conventional component fixture 200 shown in FIG. 13 in that it includes the dropout prevention member 101a and the contact member 104a. However, the component fixture 100a differs from the conventional component fixture 200 in that the component fixture 100a includes a friction applying member 102a that prevents the insertion foot 108a from being displaced (floating or tilted) with respect to the circuit board 103. Yes. Functions unique to the component mounting tool 100a will be described.

  The components are placed on the circuit board 103 by inserting the insertion feet 108 a and 108 j into the holes 106 and 106 provided in the circuit board 103. Specifically, the insertion feet 108a and 108b are respectively inserted into the two holes 106 provided in the circuit board 103, and the upper surface St of the circuit board 103, the contact portion 110 of the mounting apparatus body 105a, and the circuit board 103 The component frame 105 (component) is placed on the circuit board 103 by the contact between the upper surface St and the contact member 104a. In this state, the drop-off prevention member 101 a is fitted with the circuit board 103 to prevent the component frame 105 from dropping from the circuit board 103.

  As described above, the component mounting tool 100a is also provided at the lower end (the left side of FIG. 1A, not shown) of the component frame 105 of FIG. As a result of the insertion feet 108a of the two component attachments 100a provided at the left and right lower ends of the component frame 105 being inserted into the two holes 106 provided in the circuit board 103, the component frame 105 (components) becomes the circuit board 103. It is placed in a stable state on the top.

  It is preferable that the distance between the insertion legs 108a of the two left and right component attachments 100a and the distance between the centers of the two holes 106 into which the two insertion legs 108a are inserted are substantially equal. However, if two frictional members 102a are pressed against the inner wall surface 107 of the circuit board 103 in a state where the two insertion feet 108a are inserted into the corresponding holes 106, sufficient frictional force can be generated. There is no need to be particularly concerned with the relationship between the center distances.

  Next, with reference to FIG. 2, a process in which the component mounting tool 100a is mounted on the circuit board 103 will be described. 2A to 2D show transitions in a state in which the insertion foot 108a of the component mounting tool 100a is inserted into the hole 106 of the circuit board 103. FIG. As described above, the component fixtures 100a are provided on the left and right of the lower end portion of the component frame 105. When the insertion feet 108a are inserted into the holes 106 of the circuit board 103, the insertion feet 108a are preferably substantially At the same time, it is inserted into the hole 106. In FIG. 2, only one component fixture 100a is clearly shown. The same applies to the following description.

  As shown in FIG. 2A, when the insertion of the insertion foot 108a into the hole 106 is started, the distance between the tip of each of the drop prevention member 101a and the friction applying member 102a around the insertion foot 108a is Greater than width. That is, the drop-off prevention member 101a and the friction applying member 102a protrude beyond the width of the hole 106 to the outside.

  As shown in FIG. 2 (b), as the insertion foot 108a is inserted into the hole 106, the drop-off prevention member 101a and the friction applying member 102 come into contact with the inner wall surface 107 of the circuit board 103, respectively, so that the insertion foot 108a Elastically deforms as it approaches. As the insertion foot 108a is inserted, the drop prevention member 101a and the friction applying member 102a are also elastically deformed, and the generated compression force is also increased.

  Eventually, as shown in FIG. 2C, the leading ends of the drop-off prevention member 101 a and the friction applying member 102 are accommodated in the hole 106. That is, the tip portion contacts the inner wall surface 107. In this state, insertion of the terminal board 108a proceeds. As the insertion foot 108a is inserted, the drop prevention member 101a and the tip of the friction applying member 102a move toward the non-mounting surface Sb in a state where they are in pressure contact with the inner wall surface 107.

  Then, before the abutting member 104a abuts on the placement surface St, the compressed tip end portion of the drop-off prevention member 101a comes out of the inner wall surface 107 and extends on the non-placement surface Sb. Next, the contact member 104a contacts the placement surface St. The component attachment tool 100a is positioned in the hole 106 in a state substantially perpendicular to the placement surface St by the contact member 104a and the extended friction applying member 102a. The insertion foot 108a is further locked to the non-mounting surface Sb of the circuit board 103 by the drop-off preventing member 101a, and is prevented from dropping from the circuit board 103. Then, the mounting of the component to which the component mounting tool 100a is mounted on the circuit board 103 is completed.

  In this state, the pressure contact with the inner wall surface 107 of the friction applying member 102a is maintained. That is, the friction applying member 102 a is elastically pressed against the inner wall surface 107, so that a frictional force is generated between the friction applying member 102 a and the inner wall surface 107. Since the friction applying member 102a is elastically compressed in a state of being opened in the mounting surface St direction, when the component mounting tool 100a tries to move in the mounting surface St direction, the inner wall surface is formed at the edge of the front end portion of the friction applying member 102a. 107 is pressed, and the frictional force between the inner wall surface 107 and the friction applying member 102a increases. Further, if the tip of the drop-off prevention member 101a moves from the inner wall surface 107 to the center side of the hole 106, the compressive force acting on the friction applying member 102a increases.

  In this manner, the posture of the component once placed on the circuit board 103 is prevented from being displaced by the component mounting tool 100a. Furthermore, by preventing the movement in the direction opposite to the insertion direction, the component frame 105 (that is, the component) can be prevented from floating or tilting with respect to the circuit board 103.

  In FIG. 1, the description has been given on the assumption that the component fittings 100 a are provided at the left and right lower ends of the component frame 105 and the distance between the insertion feet 108 a of the two component fittings 100 a is determined. As a result, each insertion foot 108a is disposed at a substantially central position of the hole 106 of the circuit board 103, and the contact state between the friction applying member 102a and the inner wall surface 107 of the hole 106 is maintained. However, even if the position of the component fixture 100a with respect to the hole 106 is not fixed, the press contact state between the friction applying member 102a and the inner wall surface 107 can be realized. In this case, however, the amount of protrusion of the friction applying member 102a from the insertion foot 108a, the inclination of the insertion foot 108a with respect to the hole 106, and the contact state between the contact member 104a and the drop-off prevention member 101a and the circuit board 103 are taken into consideration. It is necessary to determine the width of the hole 106.

  In FIG. 1, the shape of the friction applying member 102a is a leaf spring shape obtained by cutting and bending a sheet metal, but it is not necessary to be a leaf spring shape. In short, any part of the insertion foot 108a may be elastically deformed, and the inner wall surface 107 may be pressed by the friction applying member 102a to increase the frictional force.

  1 illustrates an example in which the component frame 105 is temporarily fixed to the mounting surface St of the circuit board 103. However, the component frame 105 is temporarily fixed in a state of being suspended from the non-mounting surface Sb of the circuit board 103. May be. Even in this case, the component mounting tool 100 exhibits the same effect as the case where it is temporarily fixed to the upper surface St of the circuit board 103.

  Next, with reference to FIGS. 3 to 9, five modified examples of the component fixture in which the configuration of the friction applying member is changed will be described. First, with reference to FIG. 3, the component fixture 100b concerning a 1st modification is demonstrated. FIG. 3A shows a front view of the component fixture 100b, and FIG. 3B shows a side view of the component fixture 100b.

  In the component mounting tool 100b, the friction applying member 102a and the insertion foot 108a shown in FIG. 1 are replaced with the friction applying member 102b and the insertion foot 108b. In the component fixture 100a, the drop-off prevention member 101a and the friction applying member 102a are arranged on the opposing surfaces of the insertion foot 108a. In the component fixture 100b, the drop-off preventing member 101b is the same surface as the friction applying member 102b. It is arranged in.

  As shown in FIG. 1, when the drop-off prevention member 101a and the friction applying member 102a are on the opposite surfaces of the insertion foot 108a, the drop-off prevention member 101a and the circuit board 103 are deeply caught. On the other hand, if the drop-off prevention member 101a and the friction applying member 102b are on the same surface of the insertion foot 108b, not only the respective elastic forces of the drop-off prevention member 101a and the friction applying member 102b but also the elastic deformation of the insertion foot 108b itself. Can be considered.

  That is, in the component mounting tool 100a, when the insertion foot 108a passes through the hole 106, the drop-off prevention member 101a and the friction applying member 102a may be strongly pressed against the inner wall surface 107 of the hole 106 to cause permanent distortion. On the other hand, in the component mounting tool 100b, by using the elastic deformation of the insertion foot 108b, the degree to which the drop-off prevention member 101a and the friction applying member 102b are pushed from the inner wall surface 107 is reduced, and the permanent distortion is reduced accordingly. It is possible.

  In addition, regarding the positional relationship between the drop-off prevention member 101a and the hole 106, the drop-off prevention member 101a does not necessarily have to completely pass through the hole 106. As shown in FIG. 3A, the drop-off prevention member 101b does not completely pass through the hole 106 in the inserted state. The drop-off prevention member 101a passes through the hole 106 while being elastically deformed, and is restored to its original shape until it contacts the outer edge of the hole 106 at the contact portion 111a of the drop-off prevention member 101a before completely passing through. As a result, the drop-off prevention member 101a and the circuit board 103 are fitted. At this time, the drop-off prevention member 101a may be restored to its original shape or may remain elastically deformed.

  FIG. 4 shows a component fixture 100c according to a second modification. The component fixture 100c includes a drop-off prevention member 101c, a friction applying member 102c, an abutting member 104a, and an insertion foot 108c. Unlike the insertion foot 108a, the insertion foot 108c has a bent cross-sectional shape including four flat plate portions 108c_1, 108c_2, 108c_3, and 108c_4, as shown in FIG.

  As shown in FIG. 4A, the first flat plate portion 108c_1 is connected to a component in the same manner as the insertion foot 108a. The second flat plate portion 108c_2 is bent with respect to the first flat plate portion 108c_1 in the direction in which the friction applying member 102a protrudes in the component mounting tool 100a. And the 3rd flat plate part 108c_3 is bent with respect to the 2nd flat plate part 108c_2 in the direction which the drop-off prevention member 101a protruded in the component attachment tool 100a. The fourth flat plate portion 108c_4 is further bent with respect to the third flat plate portion 108c_3 in the protruding direction of the dropout prevention member 101a.

  A contact member 104a is provided from the boundary portion between the second flat plate portion 108c_2 and the third flat plate portion 108c_3 so as to form an obtuse angle θ3 with respect to the third flat plate portion 108c_3. A drop-off preventing member 101c is provided so as to extend the fourth flat plate portion 108c_4 as it is from the boundary portion between the third flat plate portion 108c_3 and the fourth flat plate portion 108c_4. In this example, the third flat plate portion 108c_3 functions as the friction applying member 102c, which will be described below.

  As shown in FIG. 4A, the distal end (fourth flat plate portion 108 c — 4) of the insertion foot 108 c is inserted into the hole 106 while being positioned on the inner side of the hole 106. This enhances the insertability.

  FIG. 4B shows a state where the component mounting tool 100 c is mounted on the circuit board 103. The fourth flat plate portion 108c_4, the third flat plate portion 108c and the drop-off preventing member 101c of the insertion foot 108c are inserted into the hole 106 in this order. When the contact member 104a comes into contact with the mounting surface St of the circuit board 103, the tip of the drop-off prevention member 101c is located on the non-mounting surface Sb side of the circuit board 103, and the circuit along with the contact member 104a. The substrate 103 is sandwiched.

  In this state, since the contact member 104a is in contact with the placement surface St, the third flat plate portion 108c_3 having an obtuse angle θ3 with respect to the contact member 104a is pressed against the inner wall surface 107 and elastically deformed. . By this elastic deformation, a frictional force is generated between the third flat plate portion 108c_3 and the inner wall surface 107. In FIG. 4B, the solid line indicates the shape in which the insertion foot 108c is inserted, and the two-dot chain line indicates the shape in the original state.

  FIG. 5 shows a component fixture 100d according to a third modification. In the component fixture 100d, the friction applying member is formed of an inelastic body. In FIG. 5, the dropout prevention member 101a, the friction applying member 102a, and the insertion foot 108a shown in FIG. 1 are replaced with a dropout prevention member 101d, the friction applying member 102d, and the insertion foot 108d.

  When the toughness of the friction applying member 102d shown in FIG. 5A is insufficient and the elastic deformation is insufficient, the entire insertion foot 108d is made an elastic body, and the friction applying member 102d has a shape that makes strong contact with the inner wall surface 107. do it. At this time, the pop-out amount H2 of the friction applying member 102d is set smaller than the pop-out amount H3 of the drop-off preventing member 101d. As shown in FIG. 5B, even when the insertion leg 108d is inserted into the hole 106, the drop-off prevention member 101d is in the hole even when the friction applying member 102d presses the inner wall surface 107 and elastically deforms the insertion leg 108d. It should be outside the width of 106. Without such a configuration, when an unexpected force exceeding the frictional force between the friction applying member 102d and the inner wall surface 107 is applied, the insertion foot 108d may come out of the hole 106 and fall off. .

  6 and 7 show a component fixture 100e according to a fourth modification. In the component fixture 100e, the shape of the friction applying member 102e is greatly different from that of the friction applying member 102a shown in FIG. FIG. 6 is a partially enlarged perspective view of the periphery of the component fixture 100e, and FIGS. 7A to 7D are a side view and a front view thereof. 7A and 7B show a side view and a front view before the component mounting tool 100e is mounted on the circuit board 103, and FIGS. 7C and 7D show the component mounting tool 100e as the circuit board. The side view and sectional drawing of the state with which 103 was mounted | worn are shown. In the component mounting tool 100e, the drop-off prevention member 101a, the friction applying member 102a, and the insertion foot 108a shown in FIG. 1 are replaced with the drop-off prevention member 101e, the friction applying member 102e, and the insertion foot 108e.

  As shown in FIGS. 6 and 7, the friction imparting member 102e includes a substantially hemispherical protrusion 161a and an elastic portion 162 that elastically supports the protrusion 161a. The elastic portion 162 is formed by providing two slits 163 in the insertion foot 108e and has toughness. As shown in FIG. 7C, the protrusion 161a of the friction applying member 102e comes into contact with the inner wall surface 107, and the elastic portion 162 is elastically deformed to increase the frictional force between the protrusion 161a and the inner wall surface 107. Yes.

  6 and 7 show an example in which the protrusion 161a of the friction applying member 102e is substantially hemispherical, it is not necessarily required to be hemispherical. An example other than a hemisphere is shown in FIG. 8A and 8B show front and side cross-sections in which the periphery of the component fixture 100e is partially enlarged. In the configuration shown in FIG. 8, the protrusion 161a shown in FIGS. 6 and 7 is replaced with a protrusion 161b. The protrusion 161b of the friction applying member 102e is formed in a triangular shape. Even if the protrusion 161b having such a shape is used, the same function as that of the protrusion 161a shown in FIGS. 6 and 7 can be exhibited.

  FIG. 9 shows a component fixture 100f according to a fifth modification. In the component mounting tool 100a described above, a linear member is used as the friction applying member 102a. However, it is not necessary to be linear. 9A to 9C show front and side cross-sections in which the periphery of the component fixture 100f is partially enlarged. FIG. 9A shows a state where the component mounting tool 100f is being inserted into the hole 106 of the circuit board 103, and FIG. 9B shows a state where the insertion is completed. FIG. 9C is a side view of FIG.

  In the configuration shown in FIG. 9, the drop-off prevention member 101a, the friction applying member 102a, and the insertion foot 108a of the component attachment 100a are replaced with a drop-off prevention member 101f, the friction applying member 102f, and the insertion foot 108f. The functions of the drop-off prevention member 101f and the insertion foot 108f are not different from the functions of the drop-off prevention member 101a and the insertion foot 108a.

  As shown in FIG. 9A, the drop-off prevention member 101f and the friction applying member 102f have dimensions that protrude beyond the width of the hole 106, and the friction applying member 102f is bent halfway. As shown in FIG. 9B, the friction applying member 102f comes into contact with the inner wall surface 107 and elastically deforms, and the reaction of the friction applying member 102f presses the inner wall surface 107. Since the friction imparting member 102f is bent in the middle, it is in contact with the inner wall surface 107 on a flat surface. By having such a shape, there is an effect that the inner wall surface 107 is not damaged.

  As for the positional relationship between the drop-off prevention member 101f and the hole 106, the drop-off prevention member 101f does not necessarily have to pass through the hole 106 completely. As shown in FIG. 9B, the drop-off prevention member 101f does not completely pass through the hole 106 in the inserted state. The drop-off prevention member 101f passes through the hole 106 while being elastically deformed, and is restored to its original shape until it comes into contact with the outer edge of the hole 106 at the contact portion 111f of the drop-off prevention member 101f before completely passing through. As a result, the drop-off prevention member 101f and the circuit board 103 are fitted. At this time, the drop-off prevention member 101f may be restored to its original shape or may remain in an elastic state.

  In the present embodiment, an example in which the component frame 105 is formed by a sheet metal press has been described. However, the processing method is not limited to the sheet metal press, and a method such as resin molding, casting, or cutting is used. It doesn't matter.

  Similarly, in the present embodiment, drop-off prevention members 101a to 101g (generically referred to as drop-off prevention member 101), friction applying members 102a to 102g (generically referred to as friction applying member 102), and contact members 104a to 104e (contact member 104). And the insertion feet 108 a to 108 g (collectively referred to as the insertion feet 108) have been described as being integrally formed with the component frame 105. However, these members do not need to be integrally formed with the component frame 105, and there is no problem even if each member is divided into two or more components.

  In the present embodiment, an example in which there are a plurality of insertion feet 108 is shown. However, the number of insertion feet 108 is not particularly limited, and may be set as appropriate depending on the size, weight, shape, position of the center of gravity, etc. .

  Further, it is not necessary to align the center of the insertion foot 108 with the center position of the hole 106, and it may be eccentric. The hole 106 is made larger than the thickness of the circuit board 103 in consideration of workability, and the catch of the drop-off prevention member 101 can be deepened by bringing the inner wall surface 107 on the side where the drop-off prevention member 101 is located close to the insertion foot 108. The elastic force of the friction imparting member 102 can also be increased.

  In addition, about each component attachment tool 100c-f shown in FIGS. 5-9, it is necessary to arrange | position in the state in which the horizontal position of the insertion leg 108 was fixed with respect to the hole 106 of the circuit board 103 similarly to the component attachment tool 100a. There is no. The width of the hole 106 in consideration of the amount of protrusion of the friction applying member 102 from the insertion foot 108, the inclination of the insertion foot 108 with respect to the hole 106, and the contact state between the contact member 104 or the drop-off prevention member 101 and the circuit board 103. If the horizontal position of the component fixture 100 is not fixed, a sufficient effect can be exhibited.

  As described above, by using the component fixture according to the present embodiment as a means for preventing the component from floating or tilting, soldering or the like in a state where the component floats or tilts due to its own weight, vibration or impact, etc. It is possible to prevent the occurrence of problems such as poor fitting.

(Embodiment 2)
In the component fixture according to the first embodiment, the friction applying member is used as a means for preventing the component from floating or tilting, that is, a means for preventing the component fixture from being displaced relative to the circuit board. On the other hand, in this embodiment, without using a friction applying member, the elasticity of the contact member and the drop-off preventing member is used, and the circuit board is sandwiched between these members to prevent displacement of the component fixture relative to the circuit board. is doing.

  FIGS. 10A to 10D show the transition of the state in which the component fixture 100g is inserted into the hole 106 of the circuit board 103. FIG. In FIG. 10, the dropout prevention member 101a, the contact member 104a, and the insertion foot 108a shown in FIG. 1 are replaced with a dropout prevention member 101g, the contact member 104g, and the insertion foot 108g. The contact member 104g is an elastic body and has a function as a component lifting portion.

  FIG. 10D shows a state in which the component fixture 100g is mounted on the circuit board 103. The drop-off prevention member 101g extends in a direction that forms an obtuse angle θ4 with respect to the insertion direction Di of the insertion foot 108a. The contact member 104g extends in a direction substantially perpendicular to the insertion direction Di of the insertion foot 108g, and is provided on the opposite side of the insertion foot 108a from the drop-off prevention member 101g.

  Hereinafter, with reference to FIG. 10, a process in which the component mounting tool 100g according to the present embodiment is mounted on the circuit board 103 will be described. As shown in FIG. 10A, the drop-off prevention member 101g first contacts the inner wall surface 107. The drop-off prevention member 101g is formed on the insertion foot 108 and protrudes outward beyond the width of the hole 106. When the insertion state further proceeds, the drop-off prevention member 101g is elastically deformed by the inner wall surface 107 as shown in FIG.

  Next, as shown in FIG. 10 (c), the contact member 104g comes into contact with the mounting surface St of the circuit board 103 and is elastically deformed, and is inserted deeper than a predetermined position for final insertion. . Therefore, the drop-off prevention member 101g and the non-mounting surface Sb of the circuit board 103 are once released from the contact state. The drop-off prevention member 101g is restored from the elastically deformed state of FIG. 10B, and again protrudes larger than the width of the hole 106 again.

  In the state where the insertion is completed as shown in FIG. 10D, the contact member 104g is restored from its elastic deformation to lift the component mounting tool 100g to a predetermined insertion depth. That is, the contact member 104g functions as a component lifting portion. In this state, the drop-off prevention member 101g is lifted together with the insertion foot 108g, and again comes into contact with the non-mounting surface Sb of the circuit board 103. At this time, the drop-off preventing member 101g protrudes greatly beyond the width of the hole 106 and does not contact the inner wall surface 107. Therefore, the drop-off prevention member 101g is closely fitted to the circuit board 103, and does not cause a gap between the circuit board 103 and the drop-off prevention member 101g that causes the component frame 105 to float or tilt.

  Next, a modified example of the component fixture according to the present embodiment will be described with reference to FIG. FIG. 11 shows a partially enlarged view of the periphery of the component fixture 100h. In the component mounting tool 100g described above, the contact member 104g, which is a component lifting portion, is formed in a leaf spring shape, but it is not necessary to have a leaf spring shape.

  FIG. 11A shows a cross section in a state in which the component mounting portion 100h is temporarily inserted deeper than a predetermined position into the hole 106 of the circuit board 103. FIG. FIG. 11B shows a cross section in a state where the component frame 105 is lifted up to a predetermined position. FIG.11 (c) is a perspective view of the state of Fig.11 (a), FIG.11 (d) is a perspective view of the state of FIG.11 (b). In the component attachment portion 100h, the dropout prevention member 101g and the insertion foot 108g of the component attachment 100g are replaced with a dropout prevention member 101h and the insertion foot 108h. The twisted portion of the insertion foot 108h exhibits the same function as the contact member 104g. Hereinafter, the twisted portion of the insertion foot 108h is referred to as a component lifting portion 112.

  As shown in FIG. 11A, the insertion foot 108h is twisted, and the insertion foot 108h is larger than the size of the hole 106 when viewed from above. However, it is assumed that the insertion foot 108h is smaller than the size of the hole 106 in an arbitrary horizontal cross section. When the insertion foot 108h is inserted into the hole 106, the insertion foot 108h and the hole 106 come into contact with each other during insertion, and when the load for insertion is further applied, the twisting angle of the insertion foot 108h is further increased. Deform.

  When the insertion depth becomes deeper than a predetermined position, the contact state between the drop-off prevention member 101h and the circuit board 103 is released. Similar to the drop-off prevention member 101g shown in FIG. 10, the drop-off prevention member 101h is released from the elastically deformed state and restored to its original state, and protrudes outside beyond the width of the hole 106. When released from the load at the time of insertion as shown in FIG. 11 (b), the insertion leg 108h that has been elastically deformed by twisting is lifted while being restored. Next, until the drop-off prevention member 101h comes into contact with the circuit board 103, the torsional elastic deformation of the insertion foot 108h is restored and the insertion foot 108h itself is lifted. That is, the insertion foot 108 h functions as the component lifting part 112.

  In the component mounting portion 100h shown in FIG. 11, the state in which the drop-off prevention member 101h is in contact with the circuit board 103 is the final state, but this is not necessarily the case. Even when a gap is generated between the drop-off prevention member 101h and the circuit board 103 in a state where the component lifting portion 112 is restored from the elastic deformation, the gap between the drop-off prevention member 101h and the circuit board 103 is smaller than that in the normal state. If this is the case, it is possible to reduce the amount of displacement or inclination of the component frame 105 by that amount.

  In the present embodiment, the component frame 105 is formed by a sheet metal press. However, the material and processing method are not limited to sheet metal press molding, and a method such as resin molding, casting, and cutting is used. It doesn't matter.

  As described above, by using the component fixture according to the present embodiment as a means for preventing the component from floating or tilting, soldering or the like in a state where the component floats or tilts due to its own weight, vibration or impact, etc. It is possible to prevent the occurrence of problems such as poor fitting.

  The component fixture according to the present invention can be widely used for functional components (modules, units, etc.) that are temporarily fixed on a circuit board and then mounted on the substrate by soldering or the like.

The figure which shows the structure of the components fixture concerning Embodiment 1 of this invention. The figure which shows the transition of the state in which the insertion leg in Embodiment 1 is inserted The figure which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The figure which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The figure which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The perspective view which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The figure which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The figure which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The figure which shows the structure of the modification of the components fixture concerning Embodiment 1. FIG. The figure which shows the transition of the state in which the insertion leg | foot in the component attachment concerning Embodiment 2 of this invention is inserted. The figure which shows the structure of the modification of the components fixture concerning Embodiment 2. FIG. The figure which shows the composition of the conventional terminal board The figure which shows the structure of the tuner unit provided with the conventional component fixture. Explanatory diagram showing the relationship between the tilt and displacement of the tuner unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Component fixture 101a-101h Drop-off prevention member 102a-102h Friction providing member 103 Circuit board 104a-104g Contact member 105 Component frame 106 Hole 107 Inner wall surface 108a-108h Insertion leg 111 Drop-off prevention member contact part 112 Component lifting part 161a, 161b Protrusion 162 Elastic part 163 Slit

Claims (12)

A component mounting tool that is inserted into a through-hole formed across a first surface of a circuit board and a second surface facing the first surface, and attaches the component onto the first surface,
A friction applying member that elastically presses against an inner wall surface of the circuit board that forms the through hole, and generates a friction force between the inner wall surface;
A drop-off prevention member facing the second surface;
A component fitting comprising: a contact member that contacts the first surface and regulates a position of the friction applying member on the inner wall surface and a position of the drop-off preventing member with respect to the second surface. The abutment member is generally perpendicular to the insertion direction;
The friction applying member is provided on the opposite side of the contact member at an obtuse angle with respect to the insertion direction,
The component mounting tool according to claim 1, wherein the drop-off prevention member is provided on the same side as the contact member at an obtuse angle with respect to the insertion direction.   The component attachment tool according to claim 1, wherein the friction applying member presses the inner wall surface with an edge.   The component fitting according to claim 3, wherein the friction force increases when the friction applying member moves in a direction opposite to the insertion direction.   The component mounting tool according to claim 1, wherein the drop-off prevention member, the friction imparting member, and the contact member are integrally formed by sheet metal pressing. The friction applying member has an obtuse angle with respect to the contact member;
The component mounting tool according to claim 1, wherein the drop-off prevention member is provided on a side opposite to the contact member in the insertion direction. The friction applying member is
An elastic part having toughness;
The component mounting tool according to claim 1, wherein the component mounting tool is configured by a protrusion attached to the elastic portion.   The component attachment tool according to claim 1, wherein the friction applying member is bent so as to approach the abutting member with respect to an axis perpendicular to the insertion direction. A component mounting tool that is inserted into a through-hole formed across a first surface of a circuit board and a second surface facing the first surface, and attaches the component onto the first surface,
A drop-off prevention member that elastically contacts the second surface;
A component fixture comprising a contact member that elastically contacts the first surface.   The component mounting tool according to claim 9, wherein the contact member is substantially perpendicular to the insertion direction, and the drop-off prevention member is provided at an opposite side to the contact member at an obtuse angle with respect to the insertion direction. .   The component mounting tool according to claim 9, wherein the contact member and the drop-off preventing member are integrally formed by sheet metal pressing.   The component fixture according to any one of claims 1 to 11 is attached to each of the opposing positions of the lower end portion, and the component fixture is a component attached to each of the two through holes of the circuit board.

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