Adapter device for preventing static electricity

Abstract

Provided is an electrostatic prevention adapter device capable of improving the convenience of an electrostatic prevention appliance. 【Solution means】An extension adapter 20 for connecting an electrostatic prevention strap 11 used when handling an electronic device to a ground point 6, which magnetically adsorbs to a metal exposed part (frame connection bolt) serving as the ground point 6 in a rack 5 on which the electronic device 2 is mounted, and a grounding part 21 that makes conductive contact with the metal exposed part; a fixing part 25 that magnetically adsorbs to a metal part (frame 5a) of the rack 5 and has a jack (G terminal 29) to which the plug 14 of the electrostatic prevention strap 11 can be attached and detached; and a power supply cord 31 that connects the grounding part 21 and the fixing part 25.

Description

Technical Field

[0001] The present invention relates to an adapter device for electrostatic prevention.

Background Art

[0002] For example, Patent Document 1 discloses an electrostatic prevention strap (electrostatic prevention device) that is worn on an operator's wrist when handling electronic devices. This electrostatic prevention strap includes a wrist strap, a connection cord electrically connected to the wrist strap, a conductive magnet for magnetically attracting the connection cord to a metal part of an electronic device and connecting it to the ground, and a connection clip for auxiliary use. The conductive magnet is attached to a middle part of the electrostatic prevention strap. The connection clip is used when it is difficult to attach a dedicated ground terminal or when it is difficult to ground with the conductive magnet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above conventional configuration, there is a problem that the conductive magnet and the connection clip are not necessarily attached to preferable positions, and it is difficult to attach the electrostatic prevention device or it is likely to come off.

[0005] Therefore, an object of the present invention is to provide an adapter device for electrostatic prevention that can improve the convenience of the electrostatic prevention device.

Means for Solving the Problems

[0006] As a means for solving the above problems, a first aspect of the present invention is an electrostatic prevention adapter device for connecting an electrostatic prevention device used when handling an electronic device to a ground point, the electrostatic prevention adapter device including a grounding portion that magnetically adsorbs to a metal exposed portion serving as the ground point and is conductively contacted with the metal exposed portion, a fixing portion that magnetically adsorbs to a metal portion of a housing on which the electronic device is mounted and has a jack to which a plug of the electrostatic prevention device can be detachably attached, and a power supply cord that connects the grounding portion and the fixing portion. According to this configuration, the grounding portion can be attached to a metal exposed portion (the ground point of the housing), such as a frame connection bolt of the housing, by magnetic attachment, and the fixing portion can be attached to an arbitrary position of the frame of the housing by magnetic attachment, so that the adapter device can be easily installed. Even if the metal exposed portion serving as the ground point is in a position where it is difficult to attach and detach the plug of the electrostatic prevention device, it is only necessary to magnetically attach the grounding portion to the metal exposed portion, and it is possible to install the fixing portion at a suitable position using the power supply cord as an extension cord. Therefore, it is possible to achieve both ease of attaching the plug of the electrostatic prevention device to the fixing portion and difficulty of the fixing portion coming off during use of the electrostatic prevention device.

[0007] A second aspect of the present invention is, in the first aspect, the metal exposed portion is a frame connection bolt serving as the ground point of the housing, the grounding portion includes a recess covering the frame connection bolt, and in a state where the recess covers the frame connection bolt, the grounding portion magnetically adheres to the frame connection bolt and is conductively contacted. According to this configuration, only when the recess of the grounding portion covers the frame connection bolt of the housing, the grounding portion magnetically adheres to and is supported by the ground point and is connected to the ground point, thereby preventing incorrect assembly with bolts that are not covered by the recess of the grounding portion, securely connecting the grounding portion to the ground point, and firmly supporting the grounding portion by the recess covering the bolt.

[0008] A third aspect of the present invention is, in the first or second aspect, the grounding portion and the fixing portion are each covered with a resin coating layer. According to this configuration, since the grounding part and the fixing part are covered with the coating layer, when detaching the grounding part and the fixing part from the metal part of the housing, insulation and buffering are performed when the parts come into contact with each other during work, and the safety can be enhanced.

[0009] In a fourth aspect of the present invention, in the third aspect described above, the fixing part is magnetically attachable to an intermediate part of a frame extending in one direction in the housing, and the coating layer of the fixing part includes a magnetic attachment surface forming part that forms a magnetic attachment surface with respect to a first surface of the frame. On the outer peripheral side of the magnetic attachment surface forming part, a protruding part that protrudes from the magnetic attachment surface toward the frame side and can contact a second surface intersecting the first surface in the frame is provided. According to this configuration, since the coating layer of the fixing part includes a protruding part that can contact the side surface of the frame, and the protruding part contacts the second surface intersecting the first surface, the position in the rotational direction along the first surface of the fixing part can be defined. By tilting the fixing part with the tip of the protruding part as a fulcrum, even if the magnetic force of the fixing part is set strong, it is easy to remove the magnetic attachment surface from the first surface of the frame, and the attachment and detachment of the adapter device can be facilitated.

Advantages of the Invention

[0010] According to the present invention, it is possible to provide an electrostatic prevention adapter device that can improve the convenience of an electrostatic prevention device.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing an outline of the electrostatic prevention system 10 of the embodiment. As shown in FIG. 1, the extended adapter 20 of the embodiment is used as one of the instruments for discharging static electricity from the body of the maintenance worker M in the security room 1 or the like. That is, in the security room 1 installed in the building to store and protect security objects such as servers and communication devices, it is necessary to take measures to protect the electronic device 2 from the electromagnetic waves of the devices brought in by the worker M who performs operation and management and the static electricity charged on the body. For example, by using the ESD terminal (electrostatic discharge terminal) of the electronic device 2 housed in the security room 1, or by using a housing such as a rack 5 that houses and mounts the electronic device 2 and is fixed (grounded) to the building structure, measures are taken to discharge static electricity from the body of the worker M.

[0013] In the embodiment, the electrostatic prevention system 10 is configured to include an existing electrostatic prevention strap 11 (electrostatic prevention instrument) worn on the body or clothing of the worker M, an extended adapter 20 provided to extend the power supply cord 13 of the electrostatic prevention strap 11, and a ground point 6 provided on the rack 5. The electrostatic prevention system 10 of the embodiment connects the body of the worker M and the ground point 6 of the rack 5 so as to be electrically conductive in order to discharge the static electricity charged on the body or clothing of the worker M to the rack 5.

[0014] The electrostatic prevention strap 11 includes, for example, a wrist strap 12 worn on the body (wrist) of the worker M and in electrical contact with the body of the worker M, a power supply cord 13 having one end (base end) connected to the wrist strap 12, and a plug 14 provided at the other end (tip) of the power supply cord 13 and detachable from a corresponding jack. The jack that allows the plug 14 to be detachable includes, for example, an ESD terminal provided in the electronic device 2, or a G terminal attached to the steel frame 5a of the rack 5. The jack of the embodiment is the G terminal 29 provided in the fixing portion 25 of the extended adapter 20. The extended adapter 20 makes the position of the jack variable with respect to the ground point 6 of the rack 5, and allows the jack to be arranged at a position where the plug 14 of the electrostatic prevention strap 11 can be easily attached and detached.

[0015] The extension adapter 20 cooperates with the anti-static strap 11 to make the body of the operator M and the ground point 6 such as the frame connection bolt 7 of the rack 5 electrically conductive. The extension adapter 20 enables the jack to be installed with freedom within the length range of its energized cord 31 with respect to the ground point 6 of the rack 5. Here, referring to FIG. 4, the conventional anti-static system 10' will be described. As in the conventional case, in a configuration where the plug 14 of the existing anti-static strap 11 is directly connected to the ESD terminal 29b of the electronic device 2 without using the extension adapter 20, there are the following problems. That is, the ESD terminal 29b may be buried in the peripheral cable 29c or the like, making the operation difficult. Also, when attaching the G terminal 29' to the perforated portion of the frame 5a or the like, it takes time and effort because a tool T is required for the attachment.

[0016] FIG. 2 is a cross-sectional view of the extension adapter 20 of the anti-static system 10 of the embodiment, and FIG. 3 is a perspective view showing the attachment state of the anti-static system 10 of the embodiment. As shown in FIGS. 1 and 2, the extension adapter 20 of the embodiment includes a grounding portion 21 and a fixing portion 25 having permanent magnets 23 and 26 at both ends of the energized cord 31, respectively. The grounding portion 21 is magnetically attached to the ground point 6 of the rack 5, and the fixing portion 25 is magnetically attached to a position where it is easy to work. Thereby, in the grounding portion 21, even when the ground point 6 of the rack 5 is in a difficult-to-access position, the attachment to the ground point 6 can be facilitated. Also, in the fixing portion 25, the degree of freedom of the connection position of the anti-static strap 11 can be increased within the length range of the energized cord 31, improving the ease of use and the difficulty of detachment. That is, the extension adapter 20 can be easily and surely installed, and further, it is difficult to interfere with the movement of the body of the operator M, thus constituting a user-friendly anti-static system 10.

[0017] Referring to FIG. 2, the extension adapter 20 magnetically adsorbs to the metal exposed portion 8 (the frame connection bolt 7 in the embodiment) that serves as the ground point 6 in the rack 5, and has a ground portion 21 that makes electrical contact with the metal exposed portion 8. The extension adapter 20 also has a fixing portion 25 that magnetically adsorbs to the frame 5a (metal portion) of the rack 5 and has a jack (G terminal 29) to which the plug 14 of the static prevention strap 11 can be detachably attached. The extension adapter 20 further includes an energization cord 31 that connects the ground portion 21 and the fixing portion 25. Thus, the ground portion 21 of the extension adapter 20 can be attached only by magnetically attaching it to the ground point of the frame 5a, and the fixing portion 25 having the G terminal 29 can also be attached only by magnetically attaching it to the metal frame 5a. Therefore, the labor and time required for installing the extension adapter 20 are reduced, and the plug 14 of the static prevention strap 11 can be connected at a position that hardly hinders the movement of the operator M.

[0018] Next, each part of the extension adapter 20 will be further described. Referring to FIGS. 2 and 3, the ground portion 21 is attached to the frame connection bolt 7 that serves as the ground point 6 in the rack 5. The ground portion 21 has a cylindrical shape that is coaxially arranged with the frame connection bolt 7 to be attached. The ground portion 21 includes a metal ground member 22 that is arranged on one end side in the axial direction, can contact the head 7a of the frame connection bolt 7, and to which one end of the energization cord 31 is connected; a permanent magnet 23 (for example, a neodymium magnet) that is arranged on the other end side in the axial direction and excites the ground member 22; and a coating layer 24 made of insulating resin that covers the outer surfaces of the ground member 22 and the permanent magnet 23.

[0019] The covering layer 24 has a bottomed cylindrical shape, and includes an outer peripheral portion 24a that covers the outer peripheral surfaces of the grounding member 22 and the permanent magnet 23, a first bottom portion 24b that covers the end surface on the side of the frame connection bolt 7 in the grounding portion 21, and a second bottom portion 24c that covers the end surface on the side opposite to the frame connection bolt 7 in the grounding portion 21. An opening 24b1 for exposing the grounding member 22 to the side of the frame connection bolt 7 is formed in the first bottom portion 24b on the side of the frame connection bolt 7. A collar portion 24b2 that protrudes from the periphery of the opening 24b1 toward the side of the frame connection bolt 7 is formed in the first bottom portion 24b. The inner peripheral surface of the collar portion 24b2 is formed in a hexagonal shape in the axial direction view so as to be fitted in alignment with the outer peripheral surface of the head portion 7a of the frame connection bolt 7.

[0020] By being mounted on the frame connection bolt 7 that fits into the collar portion 24b2, the grounding portion 21 brings the grounding member 22 into contact with the head portion 7a of the frame connection bolt 7 to make electrical conduction, and the collar portion 24b2 is fitted to the head portion 7a of the frame connection bolt 7, so that the grounding portion 21 is supported by the frame connection bolt 7. When the grounding portion 21 is mounted on a bolt smaller than the collar portion 24b2 (in other words, a bolt that is not the grounding point 6), the collar portion 24b2 does not fit onto the head of the bolt, and the grounding portion 21 falls off the bolt. Also, even when the grounding portion 21 is mounted on a bolt larger than the collar portion 24b2, the collar portion 24b2 does not fit onto the head of the bolt, and still the grounding portion 21 falls off the bolt. That is, the grounding portion 21 includes a collar portion 24b2 having a shape corresponding to the frame connection bolt 7 (grounding point 6) to be attached, and by being supported by the frame connection bolt 7 using this collar portion 24b2, mis-assembly to a bolt that is not the grounding point 6 is suppressed.

[0021] The energizing cord 31 functions as an extension cord that gives freedom to the arrangement position of the fixing portion 25 with respect to the grounding portion 21. The energizing cord 31 is a flexible ground wire, and may be, for example, a curly cord and be stretchable. By making the energizing cord 31 a curly cord, it is possible to prevent the excess length portion of the energizing cord 31 from sagging and interfering with the work.

[0022] The fixing part 25 can be magnetically attached to the longitudinal intermediate part (not limited to the central part) such as a column extending in the vertical direction or a beam extending in the horizontal direction in the rack 5. The fixing part 25 has a cylindrical shape with its axial direction facing the normal direction of the flat mounting surface 5b in the frame 5a. One end face in the axial direction of the fixing part 25 is a magnetic attachment surface 28b1 that contacts and magnetically attaches to the mounting surface 5b of the frame 5a. The fixing part 25 includes a permanent magnet 26 (for example, a neodymium magnet) arranged on one end side in the axial direction and having a magnetic force for attracting the frame 5a, a metal joint component 27 arranged on the other end side in the axial direction to which the other end of the power supply cord 31 is connected, and a coating layer 28 made of insulating resin covering the outer surfaces of the grounding member 22 and the permanent magnet 26. On the other end side in the axial direction of the fixing part 25, a jack (for example, a G terminal 29) to which the plug 14 of the static electricity prevention strap 11 can be connected is arranged and fixed to the joint component 27.

[0023] The coating layer 28 has a bottomed cylindrical shape and includes an outer peripheral part 28a covering the outer peripheral surfaces of the permanent magnet 26 and the joint component 27, a first bottom part 28b covering the end face on the frame 5a side of the fixing part 25, and a second bottom part 28c covering the end face on the side opposite to the frame 5a of the fixing part 25. The first bottom part 28b on the frame 5a side forms the magnetic attachment surface 28b1 of the fixing part 25 with respect to the frame 5a. An opening 28c1 through which the G terminal 29 passes is formed in the second bottom part 28c on the side opposite to the frame 5a. The G terminal 29 functions as a connection part to the ground point 6 of the frame 5a when the extension adapter 20 is used.

[0024] On the outer peripheral side of the first bottom portion 28b in the axial direction view of the fixing portion 25, there is a protruding portion 28d that protrudes from the magnetic attachment surface 28b1 toward the frame 5a side. The protruding portion 28d can contact the side surface 5c of the frame 5a that is orthogonal to the attachment surface 5b. By arranging the protruding portion 28d to contact along the side surface 5c of the frame 5a, positioning in the rotational direction along the attachment surface 5b of the fixing portion 25 is achieved. The fixing portion 25 can be attached in the same positioning state at any position in the longitudinal direction of the frame 5a. Since the magnetic attachment surface 28b1 of the fixing portion 25 is formed by the coating layer 28, damage to the frame 5a is suppressed even when the attachment position is moved in the longitudinal direction of the frame 5a, and the generation of sparks when strongly interfering with the frame 5a is also suppressed.

[0025] The protruding portion 28d has a crescent cross-sectional shape in a cross-section orthogonal to the axial direction and protrudes in the axial direction. The protruding portion 28d is preferably provided in a range avoiding the permanent magnet 26 in the axial direction view of the magnetic attachment surface 28b1. When the fixing portion 25 is rotated about the tip of the protruding portion 28d, the magnetic attachment surface 28b1 can be easily separated from the attachment surface 5b of the frame 5a. Thereby, even when a strong magnet such as a neodymium magnet is applied to the permanent magnet 26, the fixing portion 25 can be easily attached to and detached from the frame 5a.

[0026] As described above, the electrostatic prevention adapter device in the above embodiment is an extension adapter 20 for connecting the electrostatic prevention strap 11 used when handling the electronic device 2 to the ground point 6. It magnetically adsorbs to the metal exposed portion 8 (frame connection bolt 7) serving as the ground point 6 in the rack 5 on which the electronic device 2 is mounted, and has a grounding portion 21 that can conductively contact the metal exposed portion 8, and magnetically adsorbs to the metal portion (frame 5a) of the rack 5, and has a fixing portion 25 having a jack (G terminal 29) to which the plug 14 of the electrostatic prevention strap 11 can be attached and detached, and a power supply cord 31 connecting the grounding portion 21 and the fixing portion 25. According to this configuration, the grounding portion 21 is attached to a metal exposed portion 8 (the grounding point 6 of the rack 5), such as the frame connection bolt 7 of the rack 5, by magnetic attachment, and the fixing portion 25 is attached to an arbitrary position of the frame 5a of the rack 5 by magnetic attachment, so that the adapter device can be easily installed. Even if the metal exposed portion 8 serving as the grounding point 6 is in a position where it is difficult to attach and detach the plug 14 of the electrostatic prevention strap 11, it is only necessary to magnetically attach the grounding portion 21 to the metal exposed portion 8, and it is possible to install the fixing portion 25 at a suitable position using the power supply cord 31 as an extension cord. Therefore, it is possible to achieve both ease of attachment of the plug 14 of the electrostatic prevention strap 11 to the fixing portion 25 and difficulty of detachment of the fixing portion 25 when using the electrostatic prevention strap 11.

[0027] In the above-described extension adapter 20, the metal exposed portion 8 is the frame connection bolt 7 serving as the grounding point 6 in the rack 5, and the grounding portion 21 includes a recess (collar portion 24b2) that covers the frame connection bolt 7. In a state where the recess covers the frame connection bolt 7, the grounding portion 21 magnetically attaches to the frame connection bolt 7 and makes conductive contact. According to this configuration, only when the recess of the grounding portion 21 covers the frame connection bolt 7 of the rack 5, the grounding portion 21 magnetically attaches to and is supported by the grounding point 6, thereby preventing incorrect assembly with bolts that are not covered by the recess of the grounding portion 21, securely connecting the grounding portion 21 to the grounding point 6, and firmly supporting the grounding portion 21 by covering the recess with the bolt.

[0028] In the above-described extension adapter 20, the grounding portion 21 and the fixing portion 25 are each covered with resin coating layers 24 and 28. According to this configuration, since the grounding portion 21 and the fixing portion 25 are covered with the coating layers 24 and 28, insulation and buffering are provided when the grounding portion 21 and the fixing portion 25 are attached to and detached from the metal portion of the rack 5, and safety can be enhanced when the parts come into contact during work.

[0029] In the above-described extension adapter 20, the fixing portion 25 can be magnetically attached to the longitudinal middle portion of the frame 5a extending in one direction in the rack 5. The covering layer 28 of the fixing portion 25 includes a magnetic attachment surface forming portion (first bottom portion 28b) that forms a magnetic attachment surface 28b1 with respect to the first surface (attachment surface 5b) of the frame 5a. On the outer peripheral side of the magnetic attachment surface forming portion, there is a protruding portion 28d that protrudes from the magnetic attachment surface 28b1 toward the frame 5a side and can contact the second surface (side surface 5c) that intersects the first surface of the frame 5a. According to this configuration, the covering layer 28 of the fixing portion 25 includes the protruding portion 28d that can contact the side surface 5c of the frame 5a. By the protruding portion 28d contacting the second surface that intersects the first surface, the position of the fixing portion 25 in the rotational direction along the first surface can be defined. By tilting the fixing portion 25 with the tip of the protruding portion 28d as a fulcrum, even if the magnetic force of the fixing portion 25 is set strong, the magnetic attachment surface 28b1 can be easily removed from the first surface of the frame 5a, and the attachment and detachment of the adapter device can be facilitated.

[0030] Note that the present invention is not limited to the above-described embodiment. For example, the grounding point for attaching the grounding portion of the adapter device is not limited to the grounding point provided in the housing that houses and mounts the equipment, and may be, for example, a grounding point provided in the building structure. And the configuration in the above-described embodiment is an example of the present invention, and various modifications can be made without departing from the gist of the present invention, such as replacing the components of the embodiment with well-known components.

Description of Reference Numerals

[0031] 1 Security room 2 Electronic equipment 5 Rack (housing) 5a Frame 5b Attachment surface (first surface) 5c Side surface (second surface) 6 Grounding point 7 Frame connection bolt 8 Metal exposed portion 11 Anti-static strap (anti-static device) 14 Plug 20 Extension adapter (anti-static adapter device) 21 Grounding part 24 Coating layer 24b2 Color part 25 Fixing part 28 Coating layer 28b First bottom (Magnetic attachment surface forming part) 28b1 Magnetic attachment surface 28d Protrusion 29 G terminal (Jack) 31 Energizing cord

Claims

1. An electrostatic discharge prevention adapter device for connecting an electrostatic discharge prevention device used when handling an electronic device to a ground point, a grounding part that magnetically adheres to a metal exposed part serving as the ground point and makes conductive contact with the metal exposed part; a fixing part that magnetically adheres to a metal part of a housing on which the electronic device is mounted and has a jack to which the plug of the electrostatic discharge prevention device can be attached and detached; a current-carrying cord that connects the grounding part and the fixing part; An electrostatic discharge prevention adapter device comprising the above.

2. The metal exposed part is a frame connection bolt serving as the ground point in the housing, The grounding part includes a recess that covers the frame connection bolt, and in a state where the recess covers the frame connection bolt, magnetically adheres to the frame connection bolt and makes conductive contact therewith. The electrostatic discharge prevention adapter device according to claim 1.

3. The electrostatic discharge prevention adapter device according to claim 1 or 2, wherein the grounding part and the fixing part are each covered with a resin coating layer.

4. The fixing part can be magnetically adhered to an intermediate part of a frame extending in one direction in the housing, The coating layer of the fixing part includes a magnetic adhesion surface forming part that forms a magnetic adhesion surface with respect to a first surface of the frame, The electrostatic discharge prevention adapter device according to claim 3, wherein on an outer peripheral side of the magnetic adhesion surface forming part, there is a protruding part that protrudes from the magnetic adhesion surface toward the frame side and can contact a second surface that intersects the first surface in the frame.

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