electronic machines

Abstract

To provide an electronic device capable of preventing a mounted substrate from falling off without using a spring. [Solution] The electronic device includes a lever 40 rotatably supported on a board 14 around a rotation axis 51, a subrack 13 having an opening 13a on its front surface and mounting the board 14 so that it can be inserted and removed through the opening 13a, a pressing member 27 attached to the subrack 13 so as to straddle the opening 13a and presses the board 14 mounted on the subrack 13, a pressing member 28 provided on the rear surface of the pressing member 27 and pressing and rotating the lever 40 when the pressing member 27 is mounted on the subrack 13, and an engagement surface 29 provided on the subrack 13 and engaging with the lever 40 rotated by the pressing of the pressing member 28. The pressing position where the pressing member 28 presses the lever 40 is located on the opposite side of the rotation axis 51 from the installation position of the engagement surface 29.

Description

[Technical Field]

[0001] The present disclosure relates to electronic devices. [Background technology]

[0002] Patent Document 1 discloses an electronic device that can mount a board. The electronic device disclosed in Patent Document 1 is equipped with a board fall-off prevention structure that prevents the mounted board from falling off due to vibration or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-177558 Summary of the Invention [Problem to be solved by the invention]

[0004] The circuit board fall-off prevention structure disclosed in Patent Document 1 has a lever provided on the circuit board, a locking groove provided on the electronic device, and a spring for locking the lever in the locking groove. Therefore, the circuit board fall-off prevention structure disclosed in Patent Document 1 prevents the circuit board from falling off by locking the lever in the locking groove using the elastic force of the spring.

[0005] In the circuit board fall prevention structure disclosed in Patent Document 1, the spring is attached to a lever, which places restrictions on the size of the spring. As a result, the size of the spring is relatively small. As a result, in the circuit board fall prevention structure disclosed in Patent Document 1, the elastic force of the spring is small, so there is a risk that the holding force for holding the circuit board may not be sufficient.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an electronic device that can prevent a mounted substrate from falling off without using a spring. [Means for solving the problem]

[0007] The electronic device according to the present disclosure comprises a lever rotatably supported on a substrate around a rotation axis, a subrack having an opening on its front surface and mounting one or more substrates so that they can be inserted or removed through the opening, a pressing member attached to the subrack so as to straddle the opening and pressing the substrates mounted on the subrack, a pressing member provided on the rear surface of the pressing member and pressing and rotating the lever when the pressing member is attached to the subrack, and an engagement surface provided on the subrack and on which the lever rotated by pressing with the pressing member engages, and the pressing position at which the pressing member presses the lever is located on the opposite side of the rotation axis from the installation position of the engagement surface. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to prevent the mounted substrate from falling off without using a spring. [Brief explanation of the drawings]

[0009] [Figure 1] 1A is a perspective view of an electronic device according to embodiment 1. Fig. 1A is an overall perspective view of the electronic device according to embodiment 1 as seen from the front side. Fig. 1B is an enlarged view of a main part of Fig. 1A. [Figure 2] FIG. 10 is a front perspective view showing how the substrate is attached to the subrack. [Figure 3] FIG. 2 is a front perspective view showing a state in which the substrate is attached to the subrack. [Figure 4] 4A is a front view of the pressing member; FIG. 4B is a plan view of the pressing member; FIG. 4C is a rear view of the pressing member; and FIG. 4D is a side view of the pressing member. [Figure 5] 5A and 5B are second views showing the configuration of the pressing member, respectively: Fig. 5A is a front perspective view of the pressing member; and Fig. 5B is a rear perspective view of the pressing member. [Figure 6] FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. [Figure 7]FIG. 2 is an exploded perspective view showing the structure for attaching the lever to the substrate. [Figure 8] 8A is a plan view of the mounting structure of the lever to the substrate, FIG 8B is a cross-sectional view taken along the line VIII-VIII in FIG 8A, and FIG 8C is a side view of the mounting structure of the lever to the substrate. [Figure 9] FIG. 10 is a cross-sectional view showing a state immediately before the lever is locked. [Figure 10] 10A is a diagram illustrating the effect of different pressing positions at which the pressing member presses the lever. FIG. 10A is a diagram illustrating a case where the pressing position of the pressing member is closer to the engagement surface than the rotation axis. FIG. 10B is a diagram illustrating a case where the pressing load of the pressing member is on a horizontal line passing through the rotation axis. FIG. 10C is a diagram illustrating the configuration of the electronic device according to embodiment 1, where the pressing position of the pressing member is located on the opposite side of the rotation axis from the installation position of the engagement surface. [Figure 11] 10A and 10B are diagrams illustrating the relationship between the pressing load of a pressing member on a substrate and the pressing position of the pressing member. [Figure 12] FIG. 10 is a diagram showing a configuration of an electronic device according to a third embodiment. [Figure 13] FIG. 10 is a diagram showing a configuration of an electronic device according to a fourth embodiment. [Figure 14] FIG. 10 is a diagram showing another configuration of the electronic device according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0011] Embodiment 1 The electronic device according to the first embodiment will be described with reference to FIGS.

[0012] First, the configuration of the electronic device according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view of the electronic device according to the first embodiment.

[0013] 1 is, for example, a communication device that performs communication processing by mounting one or more boards 14 on which various electronic components are mounted. The communication device is either for transmission, reception, or transmission and reception.

[0014] As shown in FIG. 1, the electronic device according to the first embodiment includes a housing 11, communication devices 12, and a subrack 13. The housing 11 is, for example, in the shape of a rectangular parallelepiped box with an open front. The housing 11 is provided on the floor so that the longitudinal direction thereof substantially coincides with the up-down direction. The housing 11 can store the communication devices 12 and the subracks 13 such that they are stacked in multiple layers in the up-down direction. The number of communication devices 12 and the number of subracks 13 stored in the housing 11 can be adjusted as appropriate.

[0015] 1 shows an example of an electronic device with nine tiers that can store eight communication devices 12 and one subrack 13. In this example, the communication devices 12 are stored in the first tier and the third to ninth tiers from the top, and the subrack 13 is stored in the second tier. The tiers for storing the communication devices 12 and the tier for storing the subrack 13 can be adjusted as needed.

[0016] The subrack 13 has one or more boards 14 mounted therein. When the boards 14 are mounted inside the subrack 13, the boards 14 are mounted vertically so that the surface on which electronic components are mounted is parallel to the vertical direction of the housing 11. The subrack 13 can mount the vertically oriented boards 14 at predetermined intervals in the horizontal direction (or width direction) of the housing 11.

[0017] Next, the configuration of the subrack 13 will be described with reference to Figs. 2 to 6. Fig. 2 is a front perspective view showing how the substrate 14 is attached to the subrack 13. Fig. 3 is a front perspective view showing the state in which the substrate 14 has been attached to the subrack 13. Figs. 4 and 5 are diagrams showing the configuration of the pressing member 27. Fig. 6 is a cross-sectional view taken along the line VI-VI in Fig. 3. The arrow in Fig. 2 indicates the insertion direction of the substrate 14 into the subrack 13.

[0018] 2, the subrack 13 has a rectangular box shape with an open front. The subrack 13 has an opening 13a that opens forward. The subrack 13 is formed inside the housing 11 so that the lateral direction, which is the longitudinal direction, substantially coincides with the horizontal direction.

[0019] As shown in Figures 2 to 6, the subrack 13 has a bottom plate 21, left and right side plates 22, a top plate 23, a back plate 24, guide rails 25a and 25b, a connector 26, a holding member 27, a pressing member 28, and an engagement surface 29.

[0020] The bottom plate 21 is disposed at the bottom of the subrack 13 and forms the bottom surface of the subrack 13. The lower ends of the side plates 22 are joined to both lateral side portions of the bottom plate 21. The top plate 23 is provided so as to connect the upper ends of the side plates 22 to each other. The top plate 23 is disposed approximately parallel to the bottom plate 21. The back plate 24 is disposed at the rear of the subrack 13 and forms the back surface of the subrack 13. The back plate 24 is joined, from the rear side of the subrack 13, to the rear end of the bottom plate 21, the rear ends of the side plates 22, and the rear end of the top plate 23.

[0021] In this way, the subrack 13 has an opening 13a on the front surface thereof by joining the bottom plate 21, the left and right side plates 22, the top plate 23, and the back plate 24 together.

[0022] A pair of guide rails 25a, 25b is provided corresponding to one substrate 14. A plurality of pairs of guide rails 25a, 25a are provided on the subrack 13. Therefore, the subrack 13 can mount one or more substrates 14.

[0023] The pair of guide rails 25a, 25b guides the substrate 14 in the front-to-rear direction of the subrack 13 when the substrate 14, which is placed vertically, is inserted into or removed from the subrack 13. The substrate 14 is inserted into or removed from the subrack 13 through the opening 13a.

[0024] The guide rails 25a, 25b are provided on the upper surface of the bottom plate 21, which forms the bottom surface of the subrack 13, and on the lower surface of the top plate 23, which forms the ceiling surface of the subrack 13. The guide rails 25a, 25b extend in the front-to-rear direction of the subrack 13. The cross sections of the guide rails 25a, 25b have a uniform groove shape in the length direction, and the groove width is slightly wider than the plate thickness of the base plate 14. The guide rails 25a, 25b are arranged so that the grooves face each other in the up-down direction. Therefore, the upper and lower ends of the base plate 14, which is placed vertically, can be inserted into and removed from the grooves of the guide rails 25a, 25b, respectively, and can slide along the length direction of the grooves.

[0025] Although FIG. 6 shows an example in which each of the guide rails 25a and 25b is divided in the length direction, the guide rails 25a and 25b may be one continuous guide rail that is not divided.

[0026] The connector 26 is provided on the front surface of the back plate 24. The front surface of the back plate 24 is the surface facing the opening 13a in the front-rear direction. The connector 26 is electrically connected to the communication device 12. The connector 26 is also electrically connectable to a connector 15 of the substrate 14, which will be described later.

[0027] 4 to 6, the holding member 27, together with a pressing member 28 described later, prevents the substrate 14 mounted inside the subrack 13 from slipping out of the subrack 13, i.e., from falling off the subrack 13. The holding member 27 extends in the lateral direction of the subrack 13 and can be attached to both the upper and lower edge sides of the opening 13a. Also, as shown in Fig. 6, the cross section of the holding member 27 is L-shaped, which improves cross-sectional rigidity.

[0028] Specifically, one of the pressing members 27 faces the upper edge of the opening 13a and is disposed so as to straddle the opening 13a in the horizontal direction. Furthermore, both lateral ends (or both longitudinal ends) of one of the pressing members 27 are screwed to both lateral edges of the opening 13a, for example. Meanwhile, the other pressing member 27 faces the lower edge of the opening 13a and is disposed so as to straddle the opening 13a in the horizontal direction. Furthermore, both lateral ends (or both longitudinal ends) of the other pressing member 27 are screwed to both lateral edges of the opening 13a, for example.

[0029] In this way, the pressing members 27 are arranged on the upper and lower edge sides of the opening 13a and so as to straddle the opening 13a in the horizontal direction, thereby corresponding to the upper and lower front ends of all of the substrates 14 mounted vertically inside the subrack 13. As described above, the pressing members 27 are provided on the upper and lower edge sides of the opening 13a, but if they are provided on at least one of the upper and lower edge sides, it is possible to prevent the substrates 14 from falling off the subrack 13.

[0030] The pressing members 28, in conjunction with the attachment of the retaining members 27 to both lateral edges of the opening 13a, press the corresponding one of the substrates 14 toward the rear side of the subrack 13 (or toward the back panel 24) (see FIG. 9). Two pressing members 28 are provided corresponding to each pair of guide rails 25a, 25b.

[0031] 4 to 6, pressing members 28 are provided on the rear surface of each holding member 27. By being arranged, for example, on a straight line connecting guide rail 25a and guide rail 25b, each pressing member 28 can correspond to the upper and lower parts of board 14 inserted into guide rails 25a and 25b.

[0032] As shown in FIG. 6 , the engagement surface 29 is a surface that engages with the tip of a lever 40, which will be described later and which is provided on the base plate 14, when the lever 40 rotates. Specifically, the engagement surface 29 is a surface that faces the rear of the subrack 13. Two engagement surfaces 29 are provided corresponding to each pair of guide rails 25a, 25b. Specifically, one engagement surface 29 is provided on the bottom plate 21 and the other engagement surface 29 is provided on the top plate 23. One engagement surface 29 is provided so as to protrude downward from the lower surface of the bottom plate 21. The other engagement surface 29 is provided so as to protrude upward from the upper surface of the top plate 23.

[0033] Next, the configuration of the substrate 14 will be described with reference to FIGS.

[0034] As shown in FIG. 6, the board 14 has a connector 15 and a lever 40.

[0035] The connector 15 is provided at the rear end of the board 14. The connector 15 is electrically connectable to the connector 26 of the subrack 13. The rear end of the board 14 is the end that is located on the rear side of the subrack 13 (the rear panel 24 side) when the board 14 is inserted into the subrack 13. In other words, the connector 15 is provided at the rear end of the board 14 that is mounted vertically inside the subrack 13.

[0036] When the board 14 is inserted all the way into the guide rails 25a and 25b through the opening 13a of the subrack 13, the connectors 15 and 26 are connected to each other. This allows the communication device 12 and the board 14 to exchange electrical signals with each other via the connectors 15 and 26.

[0037] 6, the lever 40 is rotatably supported at the upper and lower portions of the front end side of the substrate 14 relative to the substrate 14. The front end of the substrate 14 refers to the end portion that is located on the front side of the subrack 13 (the opening 13a side) when the substrate 14 is inserted into the subrack 13. In other words, the lever 40 is provided on the front end side of the substrate 14 that is mounted vertically inside the subrack 13. Therefore, the lever 40 is disposed opposite the pressing member 28 of the holding member 27 attached to the subrack 13.

[0038] Fig. 7 is an exploded perspective view showing the mounting structure of lever 40 to substrate 14. Fig. 8 is a diagram showing the mounting structure of lever 40 to substrate 14. Fig. 9 is a cross-sectional view showing the state of lever 40 just before it is locked.

[0039] 7, the substrate 14 has a through-hole 14a. The through-hole 14a is a hole for rotatably supporting the lever 40, and penetrates the substrate 14 in its thickness direction. The through-holes 14a are provided at an upper front-end corner formed by the intersection of the front end (front edge) and the upper end (upper edge) of the substrate 14, and at a lower front-end corner formed by the intersection of the front end and the lower end (lower edge) of the substrate 14.

[0040] 7 and 8, the lever 40 has a support plate 41, an operation plate 42, and a locking protrusion 43. The support plate 41, the operation plate 42, and the locking protrusion 43 are, for example, integrally formed. Note that, of the levers 40 provided at the front upper corner and the front lower corner of the base plate 14, only the lever 40 provided at the front lower corner is shown as a representative in FIGS.

[0041] Support plate 41 and operation plate 42 are both flat and are arranged to intersect at right angles to each other. Therefore, the cross section of lever 40 is formed in an L-shape. Furthermore, support plate 41 is arranged so that its inner surface is parallel to the surface of substrate 14. The inner surface of support plate 41 is one of the inner surfaces of lever 40 whose cross section is L-shaped.

[0042] The operation plate 42 is disposed so that its inner surface faces the front end of the base plate 14. The inner surface of the operation plate 42 is the other inner surface of the lever 40 having an L-shaped cross section. The outer surface of the operation plate 42 faces the pressing member 28 provided on the rear surface of the pressing member 27 when the pressing member 27 is attached to the subrack 13, and is further pressed by the pressing member 28. The outer surface of the operation plate 42 is the surface located opposite the inner surface.

[0043] The locking protrusion 43 has a flat plate shape together with the support plate 41. The locking protrusion 43 is formed so as to extend from the side of the support plate 41 in the length direction thereof. The surface of the locking protrusion 43 is flush with the surface of the support plate 41. As shown in FIG. 9, when the lever 40 rotates, the locking protrusion 43 can be locked to the locking receiving surface 29. Note that FIG. 9 illustrates the lever 40 provided at the front upper corner of the board 14 as a representative of the levers 40 provided at the front upper corner and the front lower corner, and is a view of the lever 40 as viewed from the left side when the electronic device is viewed from the front.

[0044] As shown in FIGS. 7 and 8, the lever 40 has a rotation shaft 51, a spring washer 52, a screw 53, and a washer .

[0045] The rotating shaft 51 is provided relative to the locking projection 43 so as to protrude from the surface thereof. The rotating shaft 51 is cylindrical. An internal thread is formed on the inner peripheral surface of the rotating shaft 51. The rotating shaft 51 is inserted into the through-hole 14a of the substrate 14 from one surface of the substrate 14 via a spring washer 52. The rotating shaft 51 may be provided on the support plate 41. That is, the lever 40 may be provided with the rotating shaft 51 relative to the support plate 41 so as to protrude from the surface thereof.

[0046] The spring washer 52 is provided between the base plate 14 and the support plate 41 of the lever 40. The spring washer 52 is intended to prevent wear of the base plate 14 due to contact with the rotating lever 40 when the lever 40 rotates. The spring washer 52 is, for example, a plain washer processed into a wave shape in the axial direction of the rotation shaft 51. Therefore, even if the spring washer 52 is interposed between the base plate 14 and the lever 40, it is possible to minimize contact therebetween and not affect the rotation of the lever 40.

[0047] The screw 53 is inserted into the through hole 14a of the substrate 14 via the washer 54. At this time, the screw 53 is inserted into the through hole 14a from the other surface side of the substrate 14. Then, the screw 53 inserted into the through hole 14a is fastened to the female thread of the rotation shaft 51.

[0048] Therefore, the lever 40 is rotatably supported with respect to the base plate 14 by having the above-described configuration.

[0049] In the electronic device according to the first embodiment, when the board 14 is mounted inside the subrack 13, the board 14 is first inserted in a vertical position through the opening 13a of the subrack 13 and all the way to the back of the guide rails 25a and 25b. As a result, the connector 26 of the subrack 13 and the connector 15 of the board 14 are connected to each other.

[0050] Next, the pressing member 27 is screwed to both lateral edges of the opening 13a. At this time, the pressing member 28 provided on the rear surface of the pressing member 27 presses the outer surface of the operation plate 42 of the lever 40 supported on the base plate 14 toward the rear side of the subrack 13 (or toward the back panel 24). As a result, the lever 40 rotates around the rotation shaft 51 as the center of rotation. As a result, the locking protrusion 43 locks with the locking receiving surface 29 from the rear side toward the front side of the subrack 13.

[0051] At this time, the inner surface of the operation plate 42 abuts against the front end of the base plate 14, restricting excessive rotation of the lever 40. Therefore, the lever 40 can minimize the force with which the locking protrusion 43 hooks onto the receiving surface 29. As a result, even if the locking protrusion 43 engages with the receiving surface 29, damage to the locking protrusion 43 is prevented.

[0052] Therefore, when the electronic device is vibrated or subjected to an impact, the connector 15 of the board 14 inserted into the subrack 13 will not come off from the connector 26 of the subrack 13. Moreover, even in such cases, the board 14 will not fall off from the subrack 13. Therefore, poor connection between the connectors 15 and 26 is prevented.

[0053] 9, when the retaining member 27 is attached to the subrack 13, the pressing position where the pressing member 28 presses the outer surface of the operation plate 42 of the lever 40 is located on the opposite side of the rotation axis 51 of the lever 40 from the installation position of the engagement surface 29. Therefore, the pressing member 28 can press the substrate 14 with a large pressing load. This point will be explained using FIGS. 10 and 11.

[0054] 10 is a diagram for explaining the effect of different pressing positions at which the pressing member 28 presses the lever 40. This pressing position is a position in the height direction (up and down direction) of the subrack 13.

[0055] 10A shows a case where the pressing position of pressing member 28 is closer to engagement surface 29 than to rotation axis 51. In this case, when lever 40 is pressed by pressing member 28, the tip of locking protrusion 43 always rotates in a direction away from engagement surface 29. For this reason, the pressing load of pressing member 28 does not act on substrate 14.

[0056] 10B shows a case where the pressing load of pressing member 28 is on a horizontal line passing through rotation axis 51. In this case, the pressing load of pressing member 28 does not exceed the force applied perpendicularly to the outer surface of operation plate 42.

[0057] 10C shows the configuration of the electronic device according to embodiment 1, in which the pressing position of pressing member 28 is located on the opposite side of rotation axis 51 from the installation position of engagement surface 29. In this case, when lever 40 is pressed by pressing member 28, it always rotates in a direction in which the tip of engagement protrusion 43 engages with engagement surface 29. Furthermore, the rotation moment of lever 40 increases as the pressing position of pressing member 28 increases from rotation axis 51. Therefore, the pressing load of pressing member 28 increases as the pressing position of pressing member 28 increases from rotation axis 51.

[0058] Fig. 11 is a diagram showing the relationship between the pressing load of pressing member 28 on substrate 14 and the pressing position of pressing member 28. The vertical axis of Fig. 11 represents the pressing load of pressing member 28 on substrate 14. The horizontal axis of Fig. 11 represents the pressing position of pressing member 28. Furthermore, symbols A, B, and C shown in Fig. 11 correspond to the pressing position in Fig. 10A, the pressing position in Fig. 10B, and the pressing position in Fig. 10C, respectively.

[0059] 11, the pressing load on substrate 14 increases as the pressing position of pressing member 28 becomes farther from rotation axis 51. For this reason, in the electronic device according to embodiment 1, the pressing position of pressing member 28 is set on the opposite side of rotation axis 51 from the installation position of engagement surface 29, and is set as far away from rotation axis 51 as possible.

[0060] As described above, the electronic device according to the first embodiment includes lever 40 rotatably supported on board 14 around rotation axis 51; subrack 13 having opening 13a on its front surface and mounting one or more boards 14 thereon so as to be insertable and removable through opening 13a; presser member 27 attached to subrack 13 across opening 13a and pressing board 14 mounted on subrack 13; pressing member 28 provided on the rear surface of presser member 27 and pressing and rotating lever 40 when presser member 27 is attached to subrack 13; and engagement surface 29 provided on subrack 13 and engaging with lever 40 rotated by the pressure of pressing member 28. The pressing position where presser member 28 presses lever 40 is located on the opposite side of rotation axis 51 from the installation position of engagement surface 29. Therefore, the electronic device according to the first embodiment can prevent mounted board 14 from falling off without using a spring.

[0061] In the electronic device according to the first embodiment, lever 40 has support plate 41 provided with rotation axis 51 and facing the surface of substrate 14, operation plate 42 pressed by pressing member 28 and arranged perpendicular to support plate 41, and locking protrusion 43 provided on support plate 41 and capable of being locked onto locking surface 29. Therefore, the electronic device according to the first embodiment can simplify the configuration of lever 40.

[0062] In the electronic device according to the first embodiment, when operation plate 42 is pressed by pressing member 28, it comes into contact with substrate 14 mounted on subrack 13, restricting the rotation of lever 40. Therefore, in the electronic device according to the first embodiment, even if locking protrusion 43 is locked with locking receiving surface 29, damage to these surfaces can be prevented.

[0063] The electronic device according to the first embodiment includes spring washer 52, which is provided between substrate 14 and support plate 41 of lever 40 and through which rotation shaft 51 passes. Therefore, the electronic device according to the first embodiment can prevent wear on substrate 14 due to rotation of lever 40.

[0064] Embodiment 2 An electronic device according to embodiment 2 will be described. Note that components having the same functions as those described in embodiment 1 above will be given the same reference numerals, and descriptions thereof will be omitted.

[0065] In the electronic device according to the first embodiment, when multiple boards 14 are mounted inside the subrack 13, the pressing position and pressing load at which the pressing member 28 presses the lever 40 are the same for each board 14. On the other hand, when connectors 15, 26 of different sizes are used, or when the weights of the boards 14 are different, it may be desirable to change the necessary pressing load for each board 14.

[0066] Therefore, in the electronic device according to the second embodiment, the pressing members 28 are formed of a material having unique compression characteristics. The pressing members 28 according to the second embodiment are formed of, for example, a foamed resin material or an elastic resin material. In this way, the electronic device according to the second embodiment can change the pressing load of the pressing members 28 for each substrate 14 by forming the pressing members 28 from foamed resin materials or elastic resin materials having different compression characteristics.

[0067] Furthermore, in the electronic device according to the second embodiment, pressing member 28 is formed from a foamed resin material or an elastic resin material, so that pressing member 28 elastically deforms to follow the shape of the gap between holding member 27 and lever 40. Therefore, in the electronic device according to the second embodiment, holding member 27 and board 14 can be integrated via pressing member 28 and lever 40. As a result, the electronic device according to the second embodiment can suppress rattle of board 14 even when vibration occurs in housing 11 or when an impact is applied to housing 11.

[0068] As described above, in the electronic device according to the second embodiment, each pressing member 28 is formed of a foamed resin material or an elastic resin material having different compression characteristics. Therefore, the electronic device according to the second embodiment can change the pressing load of each pressing member 28 for each board 14. Furthermore, by providing pressing members 28 formed of a foamed resin material or an elastic resin material, the electronic device according to the second embodiment can suppress rattle of board 14 mounted on subrack 13.

[0069] Embodiment 3 An electronic device according to the third embodiment will be described with reference to Fig. 12. Fig. 12 is a diagram showing the configuration of the electronic device according to the third embodiment. Note that components having the same functions as those described in the first embodiment above are given the same reference numerals, and descriptions thereof will be omitted.

[0070] The pressing load of pressing member 28 is proportional to the contact area of ​​pressing member 28 with the outer surface of operation plate 42. The larger the contact area, the larger the pressing load. Therefore, in the electronic device according to embodiment 3, the contact area of ​​pressing member 28 with the outer surface of operation plate 42 is changed for each substrate 14 by adjusting the size of each pressing member 28. Therefore, in the electronic device according to embodiment 3, even if all pressing members 28 are made of the same material, the pressing load of pressing member 28 can be changed for each substrate 14. In this case, when the contact area of ​​pressing member 28 with the outer surface of operation plate 42 is changed, the size of the outer surface of operation plate 42 may be changed accordingly.

[0071] 12 is an example in which the contact area between the pressing member 28 and the outer surface of the operation plate 42 is narrowed by narrowing the width of the pressing member 28 and the width of the operation plate 42. As a result, the pressing load of the pressing member 28 is reduced.

[0072] 12 is an example in which the contact area between the pressing member 28 and the outer surface of the operation plate 42 is increased by widening the width of the pressing member 28 and the width of the operation plate 42. As a result, the pressing load of the pressing member 28 becomes larger.

[0073] As described above, in the electronic device according to the third embodiment, the contact area of ​​the pressing member 28 with the lever 40 differs for each board 14. Therefore, in the electronic device according to the first embodiment, even if all the pressing members 28 are made of the same material, the pressing load of the pressing members 28 can be changed for each board 14.

[0074] Embodiment 4 An electronic device according to the fourth embodiment will be described with reference to Figures 13 and 14. Note that components having the same functions as those described in the first embodiment above will be given the same reference numerals, and descriptions thereof will be omitted.

[0075] If a material that generates a relatively large pressure load due to compression is used for pressing member 28, there is a risk that pressing member 27 will be significantly deformed in a direction away from substrate 14 (toward the front of subrack 13) due to the reaction force. As a result, the amount of compression of pressing member 28 will be small, and the pressure load of pressing member 28 will not be as large as intended.

[0076] Therefore, in the electronic device according to the fourth embodiment, the cross-sectional shape of the pressing member 27 is changed to improve the cross-sectional rigidity thereof, thereby suppressing deformation of the pressing member 27 toward the forward side.

[0077] 13 shows an example in which the cross section of pressing member 27A is Z-shaped. Therefore, pressing member 27A has both widthwise ends bent in opposite directions, thereby improving cross-sectional rigidity. As a result, pressing member 27A can be prevented from deforming in a direction away from substrate 14 even when a compressive reaction force of pressing member 28 acts on it.

[0078] 14 shows an example in which the cross section of pressing member 27B is U-shaped. Therefore, both widthwise sides of pressing member 27B are bent in the same direction, improving the cross-sectional rigidity. As a result, pressing member 27B can be prevented from deforming in a direction away from substrate 14 even when a compressive reaction force of pressing member 28 acts on it.

[0079] As described above, in the electronic device according to the fourth embodiment, the cross sections of the presser members 27A and 27B are Z-shaped and U-shaped. Therefore, the electronic device according to the fourth embodiment can improve the cross-sectional rigidity of the presser members 27A and 27B. As a result, the electronic device according to the fourth embodiment can suppress deformation of the presser members 27A and 27B in the direction away from the board 14.

[0080] It should be noted that within the scope of the present disclosure, the embodiments may be freely combined, or any component in each embodiment may be modified, or any component in each embodiment may be omitted.

[0081] Various aspects of the present disclosure are summarized below as appendices.

[0082] (Appendix 1) a lever supported on the substrate so as to be rotatable about a rotation axis; a subrack having an opening on its front surface and on which one or more substrates are mounted so as to be insertable and removable through the opening; a pressing member attached to the subrack so as to straddle the opening and pressing down the substrate mounted on the subrack; a pressing member provided on a rear surface of the pressing member, which presses and rotates the lever when the pressing member is attached to the subrack; a receiving surface that is provided on the subrack and that engages with the lever that has rotated due to the pressing of the pressing member, The pressing position where the pressing member presses the lever is located on the opposite side of the rotation axis from the installation position of the engagement surface. An electronic device characterized by: (Appendix 2) The lever is a support plate on which the rotation axis is provided and which faces the surface of the substrate; an operation plate that is pressed by the pressing member and is disposed perpendicular to the support plate; a locking projection provided on the support plate and capable of being locked to the locking surface; 2. The electronic device according to claim 1. (Appendix 3) When the operation plate is pressed by the pressing member, it comes into contact with the substrate mounted on the subrack and restricts the rotation of the lever. 3. The electronic device according to claim 2. (Appendix 4) a spring washer provided between the base plate and the support plate, through which the rotation shaft passes; 4. The electronic device according to claim 2 or 3. (Appendix 5) The pressing members are made of foamed resin material or elastic resin material with different compression characteristics. 5. The electronic device according to claim 1, wherein the electronic device is a (Appendix 6) The contact area of ​​the pressing member with the lever varies depending on the substrate. 6. The electronic device according to claim 1, wherein the electronic device is a (Appendix 7) The cross section of the pressing member is formed in any one of an L-shape, a Z-shape, and a U-shape. 7. The electronic device according to claim 1, wherein the electronic device is a [Explanation of symbols]

[0083] 11 housing, 12 communication device, 13 subrack, 13a opening, 14 circuit board, 14a through hole, 15 connector, 21 bottom plate, 22 side plate, 23 top plate, 24 back plate, 25a, 25b guide rail, 26 connector, 27, 27A, 27B retaining member, 28 pressing member, 29 engagement receiving surface, 40 lever, 41 support plate, 42 operation plate, 43 engagement protrusion, 51 rotating shaft, 52 spring washer, 53 screw, 54 washer.

Claims

1. a lever supported on the substrate so as to be rotatable about a rotation axis; a subrack having an opening on its front surface and on which one or more substrates are mounted so as to be insertable and removable through the opening; a pressing member attached to the subrack so as to straddle the opening and pressing down the substrate mounted on the subrack; a pressing member provided on a rear surface of the pressing member, which presses and rotates the lever when the pressing member is attached to the subrack; a receiving surface that is provided on the subrack and that engages with the lever that has rotated due to the pressing of the pressing member, The pressing position where the pressing member presses the lever is located on the opposite side of the rotation axis from the installation position of the engagement surface. An electronic device characterized by:

2. The lever is a support plate on which the rotation axis is provided and which faces the surface of the substrate; an operation plate that is pressed by the pressing member and is disposed perpendicular to the support plate; a locking projection provided on the support plate and capable of being locked to the locking surface; 2. The electronic device according to claim 1.

3. When the operation plate is pressed by the pressing member, it comes into contact with the substrate mounted on the subrack and restricts the rotation of the lever.

3. The electronic device according to claim 2.

4. a spring washer provided between the base plate and the support plate, through which the rotation shaft passes; 3. The electronic device according to claim 2.

5. The pressing members are made of foamed resin material or elastic resin material with different compression characteristics.

2. The electronic device according to claim 1.

6. The contact area of ​​the pressing member with the lever varies depending on the substrate.

2. The electronic device according to claim 1.

7. The cross section of the pressing member is formed in any one of an L-shape, a Z-shape, and a U-shape.

2. The electronic device according to claim 1.

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