JP4558760B2 - Buffer member of magnetic disk device, shock buffering method, and electronic apparatus - Google Patents

Description

  The present invention relates to a buffer member that reduces an impact on a magnetic disk device mounted on an electronic apparatus, and more particularly to a buffer member that can be used for magnetic disk devices having various buffering resistance characteristics.

  Magnetic disk devices are rapidly becoming smaller, lighter and larger in capacity. Recently, notebook personal computers (hereinafter referred to as notebook PCs), music players, camera-integrated video recorders, car navigation systems, etc. It is often mounted on portable electronic devices or in-vehicle electronic devices. Since the magnetic disk device writes data on the rotating magnetic disk while the slider mounted with the head floats at a very small distance, the distance between the head and the magnetic disk is reduced when an external impact is applied in the recording operation mode. There is a possibility that a write error occurs due to a change or a positional deviation from the target track.

  If there is an impact on the magnetic disk device when reading data recorded on the magnetic disk, various error recovery steps can be performed to read the correct data. However, if there is a shock during writing, normal magnetic disk drives often do not verify the written data in order to prioritize the operation speed, so data with bit errors exceeding the error correction code capability has occurred. If is written, it cannot be read. Although the magnetic disk device itself has various shock resistance functions, an electronic device equipped with the magnetic disk device needs to take measures to reduce the impact on the magnetic disk device.

For example, there is a technique as described below for an anti-vibration structure that buffers an object with a plurality of elastic bodies. Patent Document 1 discloses a vibration isolating member having a structure in which a pressure receiving area expanding action, a shape responsive action, and a close contact action by excluding air in a recess are generated simultaneously by bringing the projections and depressions of the protrusion into close contact with an object. Is disclosed. Patent document 2 is disclosing about the buffer sheet which has the recessed part with which air was enclosed, and the recessed part with which the elastic material was filled. Patent Document 3 discloses an anti-vibration pad made of a rubber-like elastic material having a number of hollow protrusions formed on the surface. Patent Document 4 discloses a magnetic disk device that adjusts the contact area between the shock absorber and the case in a range of 2 to 50%.
JP-A-10-169712 JP-A-62-274129 Japanese Utility Model Publication No. 3-105737 JP 2003-272367 A

  Conventionally, a magnetic disk device mounted on a notebook PC has been supported by a buffer member to reduce the influence of vibration and impact. Only one type of buffer member is prepared for a magnetic disk device having a casing having the same shape and dimensions while paying attention to the impact resistance characteristic defined by the peak value of each magnetic disk device. However, it has been found that in recent magnetic disk devices in which the flying height of the head is reduced and the recording density is improved, the impact resistance characteristics are different even if the shape and dimensions of the housing are the same. When a notebook PC equipped with a magnetic disk device is dropped from the same height, impacts of various waveforms are applied to the magnetic disk device. For example, if a notebook PC is dropped on a hard material, the impact waveform has a large peak value and a short duration, and if it is dropped on a soft material, the impact waveform has a small peak value but a long duration. Become. Hereinafter, the former will be referred to as peak impact and the latter will be referred to as sustained impact.

  When verifying the error rate at the time of writing by giving various impacts with different durations to the magnetic disk unit, even if the magnetic disk unit has the same shape and dimensions, it will be the peak type impact if the manufacturer and storage capacity are different. It has been found that the error rate for sustained impact may be different. Further, it has been found that even in one magnetic disk device, the error rate may differ depending on the part of the casing that gives the peak type impact and the continuous type impact. From this result, even if the shape and dimensions of the housing are the same, some magnetic disk devices have low resistance to peak impact and low resistance to sustained impact. Even in the same magnetic disk device, there are a low resistance against a peak-type impact and a low resistance against a continuous impact depending on the position of the casing to which the impact is applied.

  The impact resistance characteristics differ between the peak type impact and the sustained type impact in the complex mechanical vibration system of the complex including the magnetic disk device itself and the notebook PC on which it is mounted. This is because it is configured, but it is difficult to predict what impact resistance characteristics the magnetic disk device mounted on the notebook PC will exhibit against the impact on the notebook PC. However, by repeating the experiment of measuring the error rate by applying shocks in various shock modes to a notebook PC mounted with the magnetic disk device protected by a buffer member, it is possible to determine which one for each magnetic disk device. It is possible to grasp whether such a buffer member is suitable.

  Then, it is conceivable to design and mount a buffer member having a buffer function that matches the impact resistance characteristics of each magnetic disk device. However, it is not desirable to provide a buffer member for each magnetic disk device because the number of parts held increases, management becomes complicated, and costs increase. In addition, when the magnetic disk device is replaced by a user, it is conceivable that a buffer member having an incompatible buffer function is attached.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a buffer member capable of selecting performance suitable for the impact resistance characteristics of a magnetic disk device. A further object of the present invention is to provide an electronic apparatus that can reduce the impact on the magnetic disk drive using such a buffer member. A further object of the present invention is to provide a method for buffering the impact of a magnetic disk device in an electronic apparatus.

  The present invention relates to an impact buffering member that reduces an impact on a magnetic disk device mounted on an electronic apparatus. The principle of the present invention is to prepare only one buffer member having a plurality of buffer functions, and to determine which buffer function is used, the surface shape of the housing of the magnetic disk device or the surface shape of the cover. It is to be able to decide with. The shock-absorbing member according to the present invention includes a plurality of first elastic bodies each having a support surface and a first elastic characteristic, and a plurality of second elastic bodies each having a support surface and a second elastic characteristic. And an elastic body. A plurality of specific support surfaces selected from the support surfaces of the plurality of first elastic bodies and the support surfaces of the plurality of second elastic bodies according to the surface shape of the housing or the surface shape of the cover covering the housing Supports the magnetic disk device. Here, the meaning of supporting the magnetic disk device corresponds to the case where the magnetic disk device is supported through the cover when the casing is covered with the cover.

  Since the first elastic characteristic and the second elastic characteristic are different, the buffer member is magnetic even if it is the same buffer member depending on the number of support surfaces selected from the plurality of support surfaces and the position of the support surfaces. It is possible to provide a buffer function according to the impact resistance characteristics of the disk device. The surface shape of the magnetic disk device for selecting the support surface may be configured by the surface of the housing of the magnetic disk device as shipped from the manufacturer, but it is also removable so as to cover a part or the whole of the housing You may comprise using the cover of. When a cover is used, the manufacturer of the electronic device that uses the magnetic disk device determines an appropriate buffer function for the magnetic disk device mounted on the electronic device, and forms the shape of the cover so that the buffer function can be exhibited. can do.

  The specific plurality of support surfaces can be selected as support surfaces that are in contact with only the ridges formed on the surface of the housing and / or the cover. The elastic characteristics of the first elastic body and the elastic characteristics of the second elastic body can be made different from each other by selecting the material and size of the elastic body, but an air chamber is formed in the second elastic body. If the structure of the air spring is used, it is possible to easily obtain an elastic characteristic having a large difference from the first elastic body. This elastic characteristic can be selected as an elastic characteristic that effectively buffers the peak type impact and an elastic characteristic that effectively buffers the sustained type impact.

  In this case, if the air chamber is connected to a vent hole that opens to the support surface, the air chamber is sealed only when the opening is blocked by the surface of the magnetic disk device, and exhibits the elastic characteristics of the air spring, When it is not blocked, it is possible to exhibit the elasticity characteristic unique to the material of the second elastic body. The impact buffering member may further include an elastic body having a third elastic characteristic different from the first elastic characteristic and the second elastic characteristic. When the first elastic body and the second elastic body are arranged in a line so as to be alternately arranged, the magnetic disk device can be supported at the end and the support surface can be selected finely.

  If the support surface of the first elastic body and the support surface of the second elastic body exist on substantially the same plane, the predetermined shape can be relatively easily obtained by changing the shape of the surface of the magnetic disk device. A buffer function can be obtained. The buffer member may cover the entire surface of the magnetic disk device, but the magnetic disk device is attached to both ends of the magnetic disk device with a fitting structure because the central portion of the housing is weak in strength. This can reduce the burden on the magnetic disk device. Note that the both ends of the magnetic disk device mean both ends of the cover corresponding to the both ends of the magnetic disk device when the cover is attached to the magnetic disk device.

  According to the present invention, it is possible to provide a buffer member capable of selecting performance suitable for the impact resistance characteristics of the magnetic disk device. Furthermore, according to the present invention, it is possible to provide an electronic apparatus that can reduce the impact on the magnetic disk device using such a buffer member. Furthermore, according to the present invention, a method for reducing the impact of a magnetic disk device in an electronic apparatus can be provided.

  FIG. 1 is a perspective view illustrating a state in which a magnetic disk device 10 is attached to a notebook PC 50 using the buffer members 13 and 15 according to the embodiment of the present invention. In the magnetic disk device 10 shipped from the manufacturer, the inside of the housing 12 is a sealed space in which air is kept clean, and a circuit board (not shown) is attached to the lower surface outside the housing 12. ing. Hereinafter, the circuit board and the case 12 of the magnetic disk device 10 are also referred to. In FIG. 1, the magnetic disk device 10 and the housing 12 are shown at the same reference position. The housing 12 is covered with a cover 11 on the upper surface, the lower surface, and the two side surfaces in the longitudinal direction. The side surface in the short direction where the connector 17 of the housing 12 is attached and the side surface facing the side surface are not covered with the cover 11. The range in which the cover 11 covers the housing 12 can be determined based on the condition that the connector 17 protrudes outside the cover and that the raised portions 21 described later can be appropriately arranged. Can cover the housing 12 partially or entirely in different ways.

  Rails 51 and 53 and a connector 55 are attached to a bay or slot (both not shown) of the notebook PC 50. The buffer members 13 and 15 are fitted into positions corresponding to both sides of the magnetic disk device 10 from above the cover 11. The buffer members 13 and 15 are made of a rubber material such as nitrile rubber (NBR) or silicon rubber. The magnetic disk device 10 is inserted into the rails 51 and 53 with the cover 11 and the buffer members 13 and 15 attached, and in the direction of arrow A, the connector 17 on the magnetic disk device 10 side and the connector 55 on the notebook PC 50 side It is pushed in until it is connected. The cover 11 and the buffer members 13 and 15 can be attached and detached by the user.

  Since the inside of the housing at a position corresponding to the center portion of the upper surface and the lower surface of the housing 12 is occupied by the rotating magnetic disk, a support for supporting the upper surface and the lower surface of the housing 12 is provided inside. Therefore, the central portion of the upper surface and the lower surface of the housing 12 is vulnerable to external pressure. Therefore, the buffer members 13 and 15 are fitted into both ends of the cover 11 where the magnetic disk device 10 is resistant to pressing. Since the buffer members 13 and 15 are fitted into the cover 11, the user can easily replace the buffer members 13 and 15 removed from the old magnetic disk device with the new magnetic disk device when replacing the magnetic disk device 10. Can be attached.

  Since the rubber material of the buffer members 13 and 15 does not slide well, a play of about 1 to 2 mm is provided between the rails 51 and 53 and the buffer members 13 and 15. The inside of the buffer members 13 and 15 has the same size as the outer shape of the cover 11 or a size slightly smaller than that so that the rubber material can be stretched and attached. As described in Japanese Patent Application Laid-Open No. 2004-71356, the connector 55 on the notebook PC 50 side is elastically connected to a printed circuit board (not shown), and is transmitted via the printed circuit board. The structure is such that transmission of vibrations and shocks in the direction of arrow B to the magnetic disk device 10 is mitigated.

  FIG. 2 is a perspective view showing a cross section taken along arrow X1-X1 in a state where the buffer member 13 is removed from the magnetic disk device 10 in FIG. FIG. 3 is a cross-sectional view showing a cross section taken along the line X2-X2 of the buffer member 13 in FIG. In FIG. 2, only a part of the cover 11 and the buffer member 13 necessary for the description of the structure is displayed. 2 and subsequent drawings show only the relationship between the cover 11 and the buffer member 13, but the buffer member 15 has substantially the same configuration as the buffer member 13, and the relationship with the cover 11 is also configured in the same manner. ing. Therefore, the following specific description will be given only for the buffer member 13.

  The cover 11 attached to the magnetic disk device 10 has a plurality of raised portions 21 formed on the surface thereof that come into contact with the buffer member 13 when fitted into the buffer member 13. The raised portion 21 is formed by pressing a flat plate as a material of the cover 11. A plurality of rubber protrusions 101 and hollow protrusions 103 are alternately formed on the inner side of the buffer member 13. The tip portions of the rubber projections 101 and the hollow projections 103 are substantially on the planes indicated by dotted lines 102 and 104, and the respective tip surfaces constitute a support surface for the housing 12 or the cover 11 of the magnetic disk device 10. The rubber protrusion 101 is an elastic body that is entirely formed of a rubber material and exhibits elasticity against compression.

  An air chamber 107 is formed inside the hollow protrusion 103, and the air chamber 107 communicates with a vent 105 having an opening on the support surface. Since the buffer member 13 is molded integrally by pouring a rubber material into the mold, the air chamber 107 is also opened on the outer surface of the buffer member 13 for the convenience of manufacturing. The opening on the outer surface is closed by attaching a tape 109 to the outer surface of the buffer member 13. Therefore, in the hollow protrusion 103, when the opening formed in the support surface is closed, the air chamber 107 is sealed, and when pressure is applied from the support surface side in this state, the air chamber 107 exhibits elasticity as an air spring. Therefore, the hollow protrusion 103 is an elastic body that exhibits two types of elasticity: elasticity of rubber material alone, elasticity of an air spring acting by closing the opening on the support surface side, and elasticity of the rubber material. ing.

  FIG. 4 is a cross-sectional view illustrating a method for manufacturing the buffer member 13. The buffer member 13 is formed by compression molding of rubber using a mold. FIG. 4A shows a manufacturing method for the rubber protrusion 101, and FIG. 4B shows a manufacturing method for the hollow protrusion 103. A lump or sheet of rubber is sandwiched between the upper mold 201 and the lower mold 203, melted under pressure and heating, poured into the mold, and then cooled and cured. After a suitable curing time, the buffer member 13 made of rubber can be taken out by opening the mold. At this time, there is a protrusion 207 in the upper mold 201 side that bites into the buffer member 13 that is a molded product. However, since the material of the buffer member 13 is a stretchable rubber, the upper mold 201 is not damaged. It can be taken out by peeling off. Since the protrusion 207 forms a gap between the outer wall 111 of the buffer member 13 and the rubber protrusion 101 or the hollow protrusion 103, the rubber protrusion 101 and the hollow protrusion 103 are separated from the outer wall 111 and extend and contract independently. When the raised portion 21 of the cover 11 is supported, it functions as an elastic body that absorbs vibration. The vent 105 and the air chamber 107 of the hollow protrusion 103 can be formed by providing the lower mold 203 with the protrusion 209.

  FIG. 5 is a cross-sectional view illustrating a method for selecting the position of the rubber protrusion 101 and / or the hollow protrusion 103 on which the raised portion 21 is supported, or any one of them. Since the rubber protrusion 101 is composed only of a rubber material, it functions as a rubber spring against vibration isolation of the magnetic disk device 10. On the other hand, the hollow protrusion 103 functions as a rubber spring and an air spring when the function of the air chamber 107 is used, and functions as a rubber spring when the function of the air chamber 107 is not used. The case where the function of the air chamber 107 is not used refers to a state in which the raised portion 21 does not block the opening of the support surface and is in contact with the periphery of the opening.

  Rubber springs are suitable for buffering sustained impacts because the material itself has a damping action. On the other hand, the air spring is suitable for buffering the peak type impact because it is excellent in the characteristic of blocking vibration transmission. The support surface on which the buffer member 13 can come into contact with the raised portion 21 of the cover 11 is constituted by tip portions of rubber protrusions 101 and hollow protrusions 103 that are alternately arranged.

  When the raised portion 21 is provided on the surface of the cover 11, when the buffer member 13 is fitted into the end portion of the cover 11, the rubber protrusion 101 and / or the hollow protrusion 103 disposed at a position corresponding to the raised portion 21 or any one thereof. Only one of the support surfaces supports the magnetic disk device 10 and exhibits an impact buffering action. Actually, a portion other than the raised portion 21 of the cover 11 may come into contact with the rubber projection 101 and / or the hollow projection 103 or any one of the supporting surfaces. 101 and / or the hollow protrusion 103 mainly supports the magnetic disk device 10 and exhibits an impact buffering action. In the present invention, even in such a case, the rubber protrusion 101 and / or the hollow protrusion 103 located at a position corresponding to the raised portion 21 are handled as supporting the magnetic disk device 10.

  Therefore, as shown in FIG. 5A, if the position (including the number, the same applies hereinafter) and dimensions of the raised portion 21 are determined so that the raised portion 21 contacts only the rubber protrusion 101, the buffer member 13 is A buffer function suitable for buffering a continuous impact on the magnetic disk device 10 is exhibited. Conversely, as shown in FIG. 5B, if the position and dimensions of the raised portion 21 are determined so that the raised portion 21 contacts only the hollow protrusion 103 and closes the opening of the support surface, the buffer member 13 is magnetic. A buffer function suitable for buffering the peak type impact on the disk device 10 is exhibited.

  When the surface of the raised portion 21 is brought into contact without closing the opening of the support surface, the hollow protrusion 103 functions as a rubber spring, and the volume is different, so that the elastic characteristic is the elastic characteristic of the rubber protrusion 101. Can be different. Thus, the buffer member 13 can utilize the three elasticity characteristics by selecting the position and size of the raised portion 21 formed on the cover 11.

  Further, as shown in FIG. 5C, the raised portion 21 may be in contact with both the rubber protrusion 101 and the hollow protrusion 103, and the number and position of the rubber protrusion 101 and the hollow protrusion 103 that are in contact with each other are also raised. 21 can be arbitrarily adjusted. For example, when it is desirable to provide different buffering functions depending on the part of the magnetic disk device 10 such as the periphery of the disk and the periphery of the head, the raised portion 21 is provided with a rubber protrusion for each part. If it contacts with 101 or the hollow protrusion 103, a different buffering function can be provided for every part.

  If the shock absorbing mechanism composed of the cushioning member 13 and the raised portion 21 formed on the cover 11 is employed in the notebook PC, the cushion member is formed by sequentially attaching the cover on which the raised portions 21 of various positions and numbers are formed. At the same time, the magnetic disk device is mounted on a notebook PC, and the impact rate of various waveforms is applied to the notebook PC to measure the error rate, so that the cover 11 that is suitable for the shock resistance characteristics is selected and the optimum buffer function is provided. Can be provided to the device. Here, the impact resistance characteristic means the ability of a magnetic disk device that does not generate an error or can operate with an error within a predetermined range with respect to impacts of various waveforms specified by peak values and durations. To do. In other words, by using one buffer member 13, the cover 11 having the raised portion 21 that effectively buffers the peak type shock is selected for the magnetic disk device that is weak against the peak type shock, and the continuous type is selected. For a magnetic disk device that is vulnerable to shock, an optimum buffer function can be provided simply by selecting the cover 11 having the raised portion 21 that effectively buffers the sustained shock.

  In the magnetic disk device 10, both ends to which the buffer members 13 and 15 are attached have the same shape with the cover 11 attached. Further, the buffer member 13 and the buffer member 15 can be attached to either of the left and right ends of the cover 11. When the mounting positions of the buffer members 13 and 15 with respect to the both ends of the cover 11 are determined, an appropriate buffer function cannot be exhibited if the mounting positions are reversed.

  Even if the mounting positions of the buffer member 13 and the buffer member 15 with respect to the magnetic disk device 10 are exchanged inside the buffer members 13 and 15 according to the present embodiment, and the buffer members 13 and 15 are turned upside down. The rubber protrusion 101 and the hollow protrusion 103 are arranged so as to be at the same position with respect to the raised portion 21. Therefore, it is not necessary to limit the mounting position of the buffer member 13 and the buffer member 15 with respect to the cover 11, so that the mounting position is not mistaken, and a predetermined buffer characteristic is obtained only by the position and size of the raised portion 21 formed on the cover 11. Obtainable.

  The reason why the support surfaces formed by the tip portions of the rubber protrusions 101 and the hollow protrusions 103 exist on substantially the same plane is to design a buffer member for obtaining a buffer function suitable for the magnetic disk device 10. This is for the purpose of facilitating selection of the ridges 21 formed on the cover 11 and includes the case where they exist on different planes within the scope of the present invention. Alternatively, the cover 11 may be omitted, and the raised portion 21 may be formed directly on the housing of the magnetic disk device 10 so as to contact the rubber protrusion 101 and the hollow protrusion 103.

  FIG. 6 is a perspective view showing an example in which the buffer member is attached to the notebook PC 50 side in advance. Rails 351 and 353 are attached to bays or slots provided in the notebook PC 50, and buffer members 313 and 315 are attached to the inside thereof. In FIG. 6, the buffer member 315 does not appear hidden behind the rail 353, but fits inside the rail 353, similar to the buffer member 313. The buffer members 313 and 315 are different in structure from the buffer members 13 and 15 in that insertion holes 323 and 325 for inserting the magnetic disk device 10 in the A direction are provided, but the other structures are the same. A plurality of rubber protrusions 401 and hollow protrusions 403 are alternately formed on the inner side of the buffer members 313 and 315, and their tip surfaces form a support surface for the cover 11 on substantially the same plane. .

  The magnetic disk device 10 covered with the cover 11 is inserted in the direction of the arrow A from the insertion ports 323 and 325 of the buffer members 313 and 315 attached to the inside of the rails 351 and 353, and the connector 17 on the magnetic disk device 50 side. A connector 55 on the notebook PC 50 side is connected. FIG. 7 is a partial cross-sectional view of the buffer member 313 and the rail 351 as seen from the cross-section taken along the line X3-X3 in FIG. A plurality of rubber protrusions 401 and hollow protrusions 403 are alternately formed inside the buffer member 313. The buffer member 313 selects the position and size of the raised portion 21 provided on the surface of the cover 11 of the magnetic disk device 10 according to the impact resistance characteristics of the magnetic disk device 10, thereby A buffer function suitable for impact resistance can be provided.

  In the buffer member 313, as shown in FIG. 7, air holes 407 that are sealed by attaching a tape 409 to the outer surface of the buffer member 313 are formed on the support surface of the hollow protrusion 403 without providing a vent hole. . The spacing between the support surfaces of the buffer members 313 needs to have some play with respect to the thickness of the magnetic disk device 10 including the cover 11 in order to facilitate insertion of the magnetic disk device 310. At this time, in the air chamber described with reference to FIG. 3, it is also expected that the opening of the support surface is not reliably blocked. However, since the sealed air spring is formed in advance on the hollow protrusion 403, The protrusion 403 can stably give elasticity characteristics different from those of the rubber protrusion 401. A hollow protrusion provided with a sealed air chamber may be applied to the buffer member 13, or a hollow protrusion provided with an air chamber having an opening formed on the support surface may be applied to the buffer member 313.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

  It can be used in a magnetic disk device used by being attached to a computer.

It is a perspective view explaining the state which attaches a magnetic disc apparatus with respect to a computer apparatus using the buffer member concerning embodiment of this invention. It is a perspective view which shows the X1-X1 cross section in FIG. 1 in the state which removed the buffer member from the magnetic disc apparatus. It is sectional drawing of the buffer member in the X2-X2 arrow view of FIG. It is sectional drawing explaining the manufacturing method of a buffer member. It is sectional drawing explaining the method of selecting the position where the cover of a magnetic disc device contacts a buffer member. It is a perspective view which shows the example at the time of attaching a buffer member to the notebook PC side beforehand. It is sectional drawing of the buffer member in the X3-X3 arrow view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Magnetic disk apparatus 11 ... Cover 12 ... Housing | casing 13, 15, 313, 315 ... Buffer member 17 ... Connector (magnetic disk apparatus side)
21 ... Bump 50 ... Notebook PC
51, 53, 351, 353 ... Rail 55 ... Connector (notebook PC side)
101, 401 ... rubber projection 103, 403 ... hollow projection 105 ... vent 107, 407 ... air chamber 109, 409 ... tape 323, 325 ... insertion port

Claims (12)

A shock-absorbing member that reduces the impact on a magnetic disk device mounted on an electronic device,
A plurality of first elastic bodies each having a support surface and having a first elasticity characteristic;
A plurality of second elastic bodies each having a support surface and having a second elasticity characteristic;
A plurality selected from the support surfaces of the plurality of first elastic bodies and the support surfaces of the plurality of second elastic bodies according to the surface shape of the housing of the magnetic disk device or the surface shape of the cover covering the housing. A buffer member for supporting the magnetic disk device by a support surface.   The buffer member according to claim 1, wherein the first elastic body and the second elastic body are each formed of the same elastic material, and the second elastic body includes an air chamber.   The buffer member according to claim 2, wherein the air chamber communicates with a vent hole that opens in the support surface, and the air chamber is sealed when the opening is blocked by a surface of the housing or a surface of the cover. .   The buffer member according to claim 1, wherein the first elastic body and the second elastic body are alternately arranged in a line.   The shock-absorbing member according to claim 1, wherein the support surface of the first elastic body and the support surface of the second elastic body exist on substantially the same plane. An electronic device including a buffer member that reduces a shock of a magnetic disk device,
The buffer member is
A plurality of first elastic bodies each having a support surface and having a first elasticity characteristic;
A plurality of second elastic bodies each having a support surface and having a second elasticity characteristic;
A plurality selected from the support surfaces of the plurality of first elastic bodies and the support surfaces of the plurality of second elastic bodies according to the surface shape of the housing of the magnetic disk device or the surface shape of the cover covering the housing. An electronic apparatus that supports the magnetic disk device with a support surface.   The electronic device according to claim 6, wherein the cover is detachably attached to the housing.   The electronic apparatus according to claim 6, further comprising a cover that partially covers the housing, wherein the plurality of support surfaces are selected based on a surface shape of the housing and a surface shape of the cover that partially covers the housing.   The electronic device according to claim 6, wherein the plurality of support surfaces are selected by a ridge formed on the casing and / or the cover.   The electronic device according to claim 6, wherein the buffer member is fixed to the electronic device. A method of buffering the impact of a magnetic disk device mounted on an electronic device,
Provided is a cushioning member including a plurality of first elastic bodies each having a support surface and a first elastic characteristic, and a plurality of second elastic bodies each having a support surface and a second elastic characteristic. And steps to
Selecting a plurality of support surfaces from among the support surfaces of the plurality of first elastic bodies and the support surfaces of the plurality of second elastic bodies;
Attaching a cover having a raised portion on the surface to the magnetic disk drive;
Supporting the magnetic disk device with the buffer member by aligning the positions of the plurality of selected support surfaces and the raised portions of the cover;
An impact buffering method comprising: connecting a connector of the magnetic disk device and a connector of the electronic device.   The second elastic body includes a vent opening in the support surface and an air chamber communicating with the vent hole, and the second elasticity characteristic is set by adjusting an open / close state of the vent by the raised portion. The shock absorbing method according to claim 11.

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