WO2007069355A1 - 衝撃緩衝シートとそれを用いた電子機器 - Google Patents
衝撃緩衝シートとそれを用いた電子機器 Download PDFInfo
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- WO2007069355A1 WO2007069355A1 PCT/JP2006/311187 JP2006311187W WO2007069355A1 WO 2007069355 A1 WO2007069355 A1 WO 2007069355A1 JP 2006311187 W JP2006311187 W JP 2006311187W WO 2007069355 A1 WO2007069355 A1 WO 2007069355A1
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- WIPO (PCT)
- Prior art keywords
- cushioning material
- shock
- cushioning
- impact
- shock absorbing
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
- G11B33/08—Insulation or absorption of undesired vibrations or sounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
- F16F1/422—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing the stressing resulting in flexion of the spring
- F16F1/428—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing the stressing resulting in flexion of the spring of strip- or leg-type springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24322—Composite web or sheet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
Definitions
- the present invention buffers an impact on a disk-type recording / reproducing apparatus (hereinafter referred to as a disk apparatus) such as a magnetic disk apparatus or an optical disk apparatus that records and reproduces information at a high density, or an electronic device that is carried by the user.
- a disk apparatus such as a magnetic disk apparatus or an optical disk apparatus that records and reproduces information at a high density, or an electronic device that is carried by the user.
- the present invention relates to an impact cushioning sheet and an electronic device using the same.
- the buffer capacity rapidly decreases and the buffer absorption capacity weakens, and the electronic device main body receives a relatively large impact force within a short time. Further, when the thickness of the shock absorbing member is increased, the electronic device incorporating the electronic device main body and the shock absorbing member becomes large, and it is difficult to reduce the size.
- Japanese Patent Application Laid-Open No. 11-242881 proposes to apply two types of shock absorbing members having different elastic deformation rates.
- the thickness of the hard second shock absorbing member is set to be substantially equal to the thickness at which the shock absorbing effect due to the compression of the first shock absorbing member is lost.
- the hard second shock absorbing member also absorbs the shock simply by elastic deformation.
- the impact force is effectively mitigated to prevent fatal damage to the electronic device body. It is difficult.
- FIG. 11A is a cross-sectional view of a device incorporating an electronic device such as a disk device
- FIG. 11B is a schematic perspective view of an impact buffering member used in this device.
- the shock absorbing member 1118 has a structure in which a buffer base material portion 1118A and a buffer flexible portion 1118B are combined in pieces.
- an electronic device 1117 such as a disk device is built in the device 1119 via an impact buffering member 1118.
- the buffer flexible portion 1118B softly absorbs the impact. If the impact is strong, the buffer base material portion 1118A absorbs the impact. Further, when the shock is so large that the buffer base material portion 1118A cannot be absorbed, the shock is absorbed by folding the buffer base material portion 1118A. As a result, the impact force of a very large drop impact, for example, exceeding 10,000 G is absorbed.
- the electronic device 1117 may be damaged. Further, it is necessary to dispose the shock absorbing member 1118, which is also a plurality of individual pieces, in the gap between the electronic device 1117 and the device 1119. For this reason, a complicated operation of attaching the individual shock absorbing members 1118 to the electronic device 1117 is required. Disclosure of the invention
- the present invention is an impact cushioning sheet that does not cause fatal damage due to an impact that does not transmit a large impact to the apparatus body even when subjected to a very large impact such as dropping.
- Ma It is an electronic device equipped with it.
- the shock-absorbing sheet of the present invention receives a shock load.
- the second cushioning material has a larger compression elastic modulus than the first cushioning material, and is disposed in the first cushioning material.
- the second cushioning material is arranged so as to extend in a direction substantially perpendicular to the first surface, and the cross-sectional area of the first cushioning material is a section of the second cushioning material in a cross section parallel to the first surface. More than the area.
- FIG. 1 is a schematic cross-sectional view showing the structure of an electronic device according to an embodiment of the present invention.
- FIG 2 A is a perspective view of a shock absorbing member constituting the impact cushioning sheet according to the embodiment of the present invention.
- FIG. 2B is a perspective view showing the structure of the shock-absorbing sheet in which the shock-absorbing members of FIG. 2A are arranged in close contact with each other.
- FIG. 2C is a side view showing a process of shock absorption of the shock-absorbing sheet in the embodiment of the present invention.
- FIG. 2D is a side view showing a process of shock absorption of another shock-absorbing sheet in the embodiment of the present invention.
- FIG. 3 is a diagram showing an example of a method for producing an impact cushioning sheet in the embodiment of the present invention.
- FIG. 4A is a diagram schematically showing an impact buffer member in the embodiment of the present invention.
- FIG. 4B is a view showing a state in which the schematic shock absorbing member shown in FIG. 4A is operated.
- FIG. 4C shows the impact load applied to the shock absorbing member schematically shown in FIG. It is a graph which shows each time-dependent change with the time change rate of the impact resistance of an impact member.
- FIG. 5A is a schematic side view showing an example of a method for examining the effect of shock buffering by using a conventional shock-absorbing member in a conventional arrangement.
- FIG. 5B is a schematic side view showing an example of a method for examining the effect of impact buffering by disposing a conventional impact buffering member in the same manner as in the embodiment of the present invention.
- FIG. 5C is a schematic side view showing an example of a method for examining the effect of shock buffering by the conventional arrangement of a sheet-like conventional shock absorbing member.
- FIG. 5D is a schematic side view showing an example of a method for examining the impact buffering effect of the shock absorbing member according to the embodiment of the present invention by the arrangement of the embodiment of the present invention.
- FIG. 6 is a schematic cross-sectional view showing the structure of another electronic device in the embodiment of the present invention.
- FIG. 7A is a perspective view showing another structure of the shock-absorbing sheet in the embodiment of the present invention.
- FIG. 7B is a perspective view showing a state in which a support bar is inserted into the shock absorbing member shown in FIG. 7A.
- FIG. 8 is a cross-sectional view showing another structure of the shock absorbing sheet in the embodiment of the present invention.
- FIG. 9 is a perspective view showing still another structure of the shock absorbing sheet in the embodiment of the present invention.
- FIG. 10 is a perspective view showing still another structure of the shock-absorbing sheet in the embodiment of the present invention.
- FIG. 11A is a schematic sectional view showing a structure of a disk device having a conventional shock absorbing structure.
- FIG. 11B is a perspective view of the conventional shock absorbing member shown in FIG. 11A.
- Magnetic disk unit main body (electronic device main body) 8 42, 47, 182 Shock absorbing member
- FIG. 1 is a schematic cross-sectional view showing the structure of an electronic device according to an embodiment of the present invention.
- a magnetic disk device will be described as an example of electronic equipment.
- the bearing portion 1 supports the rotary shaft 2 in a freely rotatable manner.
- the rotor hub portion 3 is fixed to the rotating shaft 2.
- a rotating magnet 4 magnetized by a plurality of magnetic poles is fixed to the lower end surface of the outer periphery of the rotor hub portion 3 by press-fitting or bonding or other known methods.
- a stator 6 is fixed to the motor chassis 5 so as to face the inner peripheral surface of the rotating magnet 4.
- the stator 6 has a configuration in which a stator core 6A having a plurality of magnetic pole tooth portions and a coil 6B is wound around each magnetic pole tooth portion. When electric current is supplied to the coil 6B, rotational driving force is generated in the rotating magnet 4, and the rotor hub portion 3 rotates.
- the spindle motor 7 is constructed.
- a magnetic disk 8 is placed on the upper surface of the flange portion of the rotor hub 3. The magnetic disk 8 rotates as the rotor hub portion 3 rotates.
- the spindle motor 7 on which the magnetic disk 8 is mounted is fixed to the substrate 9.
- the circuit board 10 is fixed to the lower inner casing 16 via a support member 11.
- the circuit board 10 includes a circuit that rotates and controls the spindle motor 7 and an electronic circuit necessary as a device such as a signal processing circuit that records or reproduces signals on the magnetic disk 8. Yes.
- the suspension 13 is fixed to the substrate 9 via the support 14.
- the suspension 13 is a swinging part that positions the magnetic head 12 at a predetermined track position.
- the magnetic head 12 is disposed so as to face the surface of the magnetic disk 8.
- the magnetic head 12 is a signal conversion element that records or reproduces a signal on the magnetic disk 8.
- the upper inner casing 15 and the lower inner casing 16 are fixed to the edge of the substrate 9 and bent at the upper side or the lower side of the substrate 9.
- the upper internal housing 15 and the lower internal housing 16 form an outer shell of the magnetic disk device main body 17 that is an electronic device main body.
- the magnetic disk unit main body 17 is configured.
- the shock absorbing members 18 arranged in a sheet form are fixed to correspond to each of the six surfaces on the outside of the magnetic disk device main body 17. That is, the shock absorbing sheet 180 is provided around the magnetic disk device body 17. The shock absorbing member 18 is in contact with the inside of the outer case 19 disposed outside the magnetic disk device main body 17. In this way, the magnetic disk device is configured.
- the magnetic disk unit main body 17 does not necessarily need to be surrounded by the upper inner casing 15 and the lower inner casing 16, and the shock absorbing member 18 is directly applied to the substrate 9 that has been subjected to processing such as bending caulking. It can be fixed.
- FIG. 2A is a perspective view showing a structure of an impact buffering member used in a magnetic disk device which is an electronic device device according to an embodiment of the present invention.
- FIG. 2B is a perspective view showing the structure of the shock absorbing sheet 180 in which the shock absorbing members 18 of FIG. 2A are arranged in close contact.
- the shock absorbing member 18 is manufactured by cutting a shock absorbing material sheet in which the first shock absorbing material 18B and the second shock absorbing material 18A are alternately laminated to a predetermined size.
- the second buffer material 18A is a buffer base material portion such as a general polyethylene sheet.
- the first cushioning material 18B is a cushioning flexible part formed by a cushioning member such as a gel. That is, the second cushioning material 18A has a larger compression elastic modulus than the first cushioning material 18B, and is disposed in the first cushioning material 18B.
- the compression elastic modulus can be defined by, for example, JIS standard JIS K 7181.
- the impact buffer member 18 (impact buffer sheet 180)
- a gel sheet having a silicone elastic resin as a main raw material, a compression elastic modulus (Yang's modulus) of 119.5 kPa, and a thickness of 2 mm was used as the first buffer material 18B.
- a polyethylene sheet having a compression elastic modulus of 7200 kPa and a thickness of 0.5 mm was used for the second buffer material 16A.
- the gel sheet is cut into 10 cm square (S01).
- the polyethylene sheet is cut into 10 cm square (S02).
- an adhesive having a synthetic rubber adhesive force is applied to the surface of the polyethylene sheet (S03).
- 100 sheets of gel sheets and polyethylene sheets are stacked alternately.
- Layer (S04). This laminate is heated, for example, at 40 ° C for 30 minutes to cure the adhesive (S05). After curing, cut to lmm thickness in the stacking direction (S06). In this way, the shock absorbing sheet 180 is completed (S07).
- the second cushioning material 18A made of, for example, a polyethylene sheet has a certain degree of hardness. Therefore, when the shock absorbing member 18 is pressed in the in-plane direction, the second shock absorbing material 18A is bent and deformed.
- the first cushioning material 18B has a cushioning performance like a rubber material. Therefore, when the impact cushioning member 18 is pressed, the first cushioning material 18B is compressed and deformed. That is, the compression elastic modulus of the second buffer material 18A is larger than the compression elastic modulus of the first buffer material 18B.
- the shock absorbing member 18 has a configuration in which the second shock absorbing material 18A and the first shock absorbing material 18B are combined.
- first buffer material 18B there are various combinations of materials that realize the magnitude relationship of the compression elastic modulus between the first buffer material 18B and the second buffer material 18A.
- a general gel material such as silicone gel or a rubber material such as natural rubber or synthetic rubber can be used as the first buffer material 18B.
- polyethylene terephthalate (PET), polynaphthalene terephthalate (PEN), polytetrafluoroethylene (PTFE), polycarbonate, etc. can be used as the second buffer material 18A.
- the shock-absorbing sheet 180 has end surfaces 21 and 22 on both sides in the longitudinal direction that are perpendicular to the surface where the second buffer material 18A and the first buffer material 18B in FIG. Have The end face 22 is a first face that receives an impact load, and the end face 21 is a second face facing it.
- the impact cushioning sheet 180 is installed between the upper inner casing 15 or the lower inner casing 16 and the outer case 19. That is, the shock absorbing sheet 180 is installed between the magnetic disk device main body 17 and the outer case 19.
- the end faces 21 and 22 are arranged so as to abut on the surface on the outer side of the magnetic disk device main body 17 and the surface on the inner side of the outer case 19, respectively.
- the shock-absorbing sheet 180 is integrally formed by laminating the second shock-absorbing material 18A having a certain degree of hardness and the first shock-absorbing material 18B having a very soft cushioning performance.
- the first buffer material 18B and the second buffer material 18A having a thickness are formed as layers, and alternate in a direction substantially perpendicular to the end faces 21, 22. Laminated arrangement Has been.
- the thickness of the first buffer material 18B and the thickness of the second buffer material 18A may be different. At this time, it is desirable that the average thickness of the first buffer material 18B in the stacking direction is equal to or greater than the average thickness of the second buffer material 18A.
- the second cushioning material 18A is disposed so as to extend in a direction substantially orthogonal to the end faces 21, 22, and the cross-sectional area of the first cushioning material 18B is in a cross section parallel to the end faces 21, 22
- the cross-sectional area of the second cushioning material 18A may be larger than that.
- the area of the first buffer material 18B on the end surfaces 21 and 22 is equal to or larger than the area of the second buffer material 18A. If so,
- the average thickness of the second cushioning material 18A is larger than the average thickness of the first cushioning material 18B, the effect of the first cushioning material 18B as the cushioning material is manifested.
- the impact cushioning sheet 180 is configured only by the hard second cushioning material 18A, and the cushioning effect is reduced. Therefore, it is preferable that the first cushioning material 18B and the second cushioning material 18A have the above-mentioned size! /.
- both the second cushioning material 18A and the first cushioning material 18B are impacted in parallel.
- the thickness of the shock-absorbing portion of the shock-absorbing member 18 is set to an appropriate thickness.
- the second shock-absorbing material 18A having a certain degree of hardness and the first shock-absorbing material 18B having cushioning performance are parallel to the initial shock when receiving a very large shock. Can be shocked.
- the thickness of the buffer portion of the shock absorbing member 18 is the distance between the end surface 21 and the end surface 22.
- FIG. 2C is a side view showing a process of shock absorption of the shock absorbing sheet in the embodiment of the present invention.
- the second cushioning material 18A mainly withstands the impact.
- the second cushioning material 18A bends at the middle bend 181. That is, the second cushioning material 18A has a bent portion 181 that bends and deforms in a direction parallel to the end surface 22 when a load is applied to the end surface 22. Then, the second cushioning material 18A cannot withstand the impact compression force and buckles at the bent portion 181 near the intermediate portion.
- FIG. 2C shows an example in which the second buffer material 18A is bent in the same direction, but the second buffer material 18A has a bent portion that is randomly bent in different directions. In some cases. In this case, the second cushioning material 18A has a portion to be compressed and a portion to be expanded. Ga layer is exhibited.
- FIG. 2D is another side view showing a process of shock absorption of the shock absorbing sheet 180, and shows another change of the second shock absorbing material 18A when receiving the shock.
- the second cushioning material 18A falls to the left in the drawing without buckling!
- the second cushioning material 18 A is inclined in a direction parallel to the end face 22.
- the same effect as in the case of buckling occurs until the second cushioning material 18A falls from the vertical state with respect to the outer case 19.
- FIG. 4A is a diagram schematically showing the operation of the shock absorbing member 18 composed of the second shock absorbing material 18A and the first shock absorbing material 18B.
- the outer case 19 and the lower inner casing 16 (or the upper inner casing 15) are arranged in parallel.
- the second cushioning material 18A is regarded as a rigid body with the bent portion 181 as a link and is indicated by a solid line.
- the first cushioning material 18B is shown as a graphic with a spring! /.
- FIG. 4B shows a state when the impact load F is applied from the outer case 19.
- FIG. 4C is a graph showing changes of the impact load F applied to the shock absorbing member 18 and the time change rate P of the impact resistance of the shock absorbing member 18 over time t.
- the first shock absorber 18B is initially pressed by, for example, a rubber member so that the second shock absorber 18A is bent, for example, by a leaf spring. Both are elastically deformed so as to be compressed. Therefore, the time change rate P of the impact resistance changes almost along the impact load F up to the point U at time tl in FIG. 4C at time tl.
- the second cushioning material 18A which is a rigid body, stagnates at the bent portion 181 and begins to bend. This may be considered to be such that the second buffer material 18A is bent with the bent portion 181 as a link.
- the time change rate P of the impact resistance of the second cushioning material 18A is almost constant and does not change, and reaches point V at time t2 in FIG. 4C.
- the second cushioning material 18A cannot be withstood by the impact compressive force, and the second cushioning material 18A Buckling at part 181. That is, as shown in FIG. 2C, the second buffer material 18A is refracted at the bent portion 181. At this time, as shown in FIG. 4B, it is considered that the second buffer material 18A is deformed so as to be bent with the bent portion 181 as a link. At this point, the shock absorbing member 18 is compressed by a deformation amount ⁇ . In this way, the shock absorbing member 18 absorbs the shock load F.
- the first cushioning material 18B having cushion performance mainly absorbs the impact load F. For this reason, the time change rate ⁇ ⁇ of the impact resistance gradually decreases as shown on the right side of the point V in FIG. 4C.
- the shock-absorbing sheet 180 has a certain degree of hardness, and the second cushioning material 18A formed using a flexible material and the cushioning performance are very flexible. And a first buffer material 18B formed using a simple material.
- the second cushioning material 18A bends at the bent portion 181 at the intermediate portion and further buckles to absorb the impact force.
- at least one of the notches and notches in the middle of the second cushioning material 18A (bend portion 181) May be provided.
- the second buffer material 18A may not be exposed at the end faces 21, 22. Even in this case, if the second cushioning material 18 ⁇ bridges between the end surface 21 and the end surface 22 when the first cushioning material 18 ⁇ is compressed and deformed, the impact cushioning effect by the second cushioning material 18A can be obtained. However, if both end portions of the second cushioning material 18A are exposed at the end faces 21 and 22, the impact cushioning effect by the second cushioning material 18A is exposed at the end face as described above. Even more powerful Therefore, it is preferable.
- the second shock-absorbing member 42A force of the conventional shock-absorbing member 42 is bonded to the outer surface of the simulation device 41 corresponding to the magnetic disk device main body 17 in FIG.
- the first buffer material 42B is bonded to the surface of the second buffer material 42A that faces the surface bonded to the outer surface of the simulation device 41.
- the second buffer material 42A and the first buffer material 42B are arranged in series with respect to the direction of the impact load. That is, the base 43, the second cushioning material 42A, the first cushioning material 42B, and the simulation device 41 corresponding to the outer case 19 in FIG. 1 are stacked in this order. Note that the same result can be obtained even when the second cushioning material 42A and the first cushioning material 42B are stacked in reverse.
- the second shock-absorbing material 47A and the first shock-absorbing material 47B of the conventional shock-absorbing member 47 are arranged so as to be parallel to the shock load direction.
- the second shock-absorbing material 182 A of the conventional shock-absorbing member 182 is bonded to the outer surface of the simulation device 41.
- the first buffer material 182B is bonded to the other surface of the second buffer material 182A.
- the second buffer material 182A and the first buffer material 182B are arranged in series with respect to the direction of the impact load.
- the second shock-absorbing material 18 A and the first shock-absorbing material 18 B of the shock-absorbing member 18 according to the present invention are arranged in parallel to the direction of the shock load. Have been. In this way, the shock absorbing sheet 180 is arranged.
- the heights of the shock absorbing members 42, 47, 182, and 18, that is, the distance between the base 43 and the simulation device 41 are all set to be the same.
- Table 1 shows the respective maximum impact values and impact times obtained from a graph in which the G values that are the outputs of the accelerometers 45 and 48 are recorded.
- the impact time was the time it took for the impact start force in each graph to reach 10G or less.
- the maximum impact value and impact time by the accelerometer 44 attached to the upper surface of the base 43 are the average values of the data obtained in four types of configurations.
- the first buffer materials 42B and 182B and the second buffer materials 42A and 182A are arranged in series with respect to the direction of the impact load (Experiment No. 1 and No. 3).
- the shock absorbing performance of the first cushioning materials 42B and 182B works effectively from the initial point of impact. Therefore, buffer performance is demonstrated early. For this reason, the impact period is short. If a very large impact force is received while the pressure is applied, the elastic repulsion force increases with the time when the first buffer material 42B, 182B is greatly compressed and deformed. As a result, the maximum impact value that the simulator 41 receives is also increased. In the end, it becomes almost the same as a rigid connection, and a so-called bottoming phenomenon occurs. Therefore, there is almost no shock buffering effect.
- the first buffer materials 47B and 18B and the second buffer materials 47A and 18A are arranged in parallel (Experiment No. 2 and No. 4). ).
- the second cushioning materials 47A and 18A and the first cushioning materials 47B and 18B receive the compressive force in parallel at the initial stage of receiving the impact compressive force.
- the elastic repulsive force of the second cushioning material 47A, 18A mainly provides resistance against compression.
- the second cushioning materials 47A and 18A buckle without being able to withstand the compression force, and the compression repulsion force of the second cushioning materials 47A and 18A gradually decreases.
- the shock absorbing members 47 and 18 are the same as the conventional method in which the first shock absorbing material and the second shock absorbing material are arranged in series with respect to the direction of the shock load like the shock absorbing members 42 and 182.
- the impact compression force can be received for a long time. For this reason, the effect of reducing the impact force is greatly increased.
- This impact mitigating effect is more prominent because the shock absorbing member 18 in the embodiment of the present invention buffers the shock over a wider area than the shock absorbing member 47.
- the results of the conventional shock absorbing members 42 and 47 shown in FIGS. 5A and 5B (Experiment No.
- the second cushioning material 18A and the first cushioning material 18B are stacked in a direction substantially perpendicular to the impact load direction and impact is applied.
- the buffer member 18 is configured.
- an impact cushioning member 180 constitutes an impact cushioning sheet 180.
- the maximum impact value received by the simulation device 41 is 800G, which corresponds to 1Z10 in the configuration (experiment No. 0) in which the impact damping member 18 is not used. It is also reduced from about 36% to 50% compared to the conventional configuration.
- the impact time has dropped to less than half of the impact time required for the platform 43.
- the effectiveness when the shock absorbing members 18 are used in parallel is shown.
- FIG. 6 is a schematic cross-sectional view when the arrangement method of the shock absorbing member 18 is changed.
- the weight of electronic equipment is rarely evenly distributed, and there is a weight concentration section.
- the second cushioning material 18A By arranging the second cushioning material 18A at a high density in this weight concentrated portion, it is possible to have a greater impact cushioning effect. That is, it is preferable that the arrangement density of the second cushioning material 18A is large where the impact load is large. In addition, it is desirable that the second cushioning material 18A is densely arranged in the heavy member portion, and the second cushioning material 18A is sparsely arranged in the light member portion. For example, the second cushioning material 18A is densely disposed at a place where the support member 11 and the substrate 9 are directly fixed to the upper inner casing 15 and the lower inner casing 16, or the like. It is preferable to configure the shock absorbing sheet 180A in this way.
- FIG. 2A a rectangular parallelepiped-shaped shock absorbing member 18 is shown, and in FIG. 2B, a multilayered structure of the shock-absorbing sheet 180 formed by integrally arranging a plurality of rectangular solid-shaped shock absorbing members 18 in close contact with each other. It is shown and speaks.
- the shape of the shock absorbing member of the present invention is not limited to this example.
- a hole 183 may be provided in the center of the shock absorbing sheet 180 in which the shock absorbing members 18 are laminated.
- a support rod 184 that is an extension portion from a device main body (not shown) may be inserted into the hole 183 and fixed. In this case, the same buffering effect as described above can be obtained.
- the impact buffering members 18 are arranged side by side and the shock buffering sheet 180 is configured.
- the shock absorbing sheet 180 may be sandwiched between the base sheets 185.
- the shock-absorbing sheet 180 is more easily handled by the configuration in which the first shock-absorbing material 18B and the second shock-absorbing material 18A are integrally formed.
- the base sheet 185 is a thin material such as a polyethylene sheet. If the first buffer material 18B is a gel material, the base sheet 185 is easily held and fixed on the base sheet 185 by its adhesiveness.
- the shock-absorbing cushioning sheet 180B may be configured by dispersing and arranging the cylindrical second cushioning material 18C in the first cushioning material 18B of the gel material.
- the second shock-absorbing material 18C is arbitrarily arranged so that the axis direction of the cylinder of the second cushioning material 18C is substantially perpendicular or the radial direction is substantially parallel to the end faces 21 and 22 with respect to the end faces 21 and 22.
- the shock-absorbing sheet 180B uses, for example, a photosensitive organic sheet as the first buffer material 18B, and an opening (through hole) is formed in the sheet by exposure and development, and a thermosetting organic sheet is formed in the opening. Thermosetting after filling with fat material By doing so, the second buffer material 18C can be formed.
- the second cushioning material 18C has a larger compression elastic modulus than the first cushioning material 18B, and is disposed in the first cushioning material 18B.
- the second cushioning material 18C may be regularly arranged at a predetermined interval as shown in FIG. 9, or may be randomly arranged without a large interval.
- the average diameter of the second cushioning material 18C is preferably smaller than the average arrangement interval.
- the second cushioning material 18C is arranged so as to extend in a direction substantially orthogonal to the end surfaces 21, 22, and the cross-sectional area of the first cushioning material 18B is the same in the cross section parallel to the end surfaces 21, 22. It is desirable that it is greater than the cross-sectional area of the cushioning material 18C. The reason for this is the same as the structure of FIG. 2B.
- the cylindrical second shock-absorbing material 18C may have the same diameter or different diameters.
- the second buffer material 18C is not limited to a cylindrical shape, and may be a polygonal column shape, a semi-columnar shape, or an elliptical column shape. Further, even with the shock-absorbing sheet 180 in which the second shock-absorbing material 18C having a small outer diameter and a fiber shape is disposed, the same shock-absorbing effect as described above can be obtained. Further, in the case of the second cushioning material 18C as shown in FIG. 9, the bending direction is often a random direction.
- the second cushioning material 18C may not be exposed at the end faces 21 and 22. Even in this case, if the second cushioning material 18C bridges between the end surface 21 and the end surface 22 when the first cushioning material 18B is compressed and deformed, the impact cushioning effect by the second cushioning material 18C can be obtained. However, if both ends of the second cushioning material 18C are exposed at the end surfaces 21 and 22, they are exposed at the end surfaces as described above, and the impact of the second cushioning material 18C is stronger than in the case. Since a buffering effect is obtained, it is preferable.
- the structure shown in Fig. 10 may be used in addition to the case where a plurality of shock absorbing members 18 are arranged in a stripe shape like the shock absorbing sheet 180 shown in Fig. 2B.
- the shock absorbing sheet 186 is formed by winding a single shock absorbing member 18 in a spiral shape, which is composed of the second shock absorbing material 18A and the first shock absorbing material 18B! ing. That is, the first buffer material 18B and the second buffer material 18A are formed in a ribbon shape, and the stacked first buffer material 18B and the second buffer material 18A are wound in a spiral shape. Yes.
- the second shock absorbing material 18A and the first shock absorbing material 18B are formed in an annular shape, and a plurality of shock shock absorbing members 18 having different sizes are fixedly formed concentrically to form an impact shock absorber that looks like Baumkuchen. Sheet It is also possible to form.
- the second cushioning material 18B has a larger compression elastic modulus than the first cushioning material 18B, and is disposed in the first cushioning material 18B.
- the second cushioning material 18A is arranged so as to extend in a direction substantially perpendicular to the end faces 21 and 22.
- the average thickness of the first buffer material 18B is equal to or greater than the average thickness of the second buffer material 18A. That is, it is preferable that the cross-sectional area of the first buffer material 18B is equal to or larger than the cross-sectional area of the second buffer material 18A in the cross-section parallel to the end faces 21 and 22.
- the magnetic disk device 17 has been described as an example of the electronic apparatus.
- the present invention is not limited to this.
- the present invention can be applied to an optical disk device, an optical magnetic disk device, or any other electronic device that is carried.
- the impact absorbing capacity of the impact cushioning sheets 180, 180A, 180B and 186 is not sufficient. . Therefore, in such a case, it is preferable to attach a sensor for detecting the buckling of the second cushioning materials 18A, 18C to the impact cushioning sheets 180, 180A, 180B, 186. It is preferable to provide the electronic apparatus with a display system that prompts replacement of the shock absorbing sheets 180, 180A, 180B, and 186 based on the buckling detection signal.
- the shock-absorbing effect is small and the elastic repulsion is relatively large at the initial stage of impact.
- the elastic repulsion force is small and the buffering effect is large.
- This shock-absorbing sheet can receive the impact compression force for a relatively long time. For this reason, even when an electronic device using this shock-absorbing sheet is used on a mobile phone, even if a very large impact is applied due to dropping or the like, the electronic device device will not be fatally damaged.
- This shock-absorbing sheet can be applied to information recording / reproducing devices such as disk devices, and portable electronic devices and devices incorporating these devices.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/095,979 US20090047470A1 (en) | 2005-12-12 | 2006-06-05 | Shock eliminating sheet and electronic appliance making use of the same |
JP2007550073A JPWO2007069355A1 (ja) | 2005-12-12 | 2006-06-05 | 衝撃緩衝シートとそれを用いた電子機器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005357388 | 2005-12-12 | ||
JP2005-357388 | 2005-12-12 |
Publications (1)
Publication Number | Publication Date |
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WO2007069355A1 true WO2007069355A1 (ja) | 2007-06-21 |
Family
ID=38162673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/311187 WO2007069355A1 (ja) | 2005-12-12 | 2006-06-05 | 衝撃緩衝シートとそれを用いた電子機器 |
Country Status (4)
Country | Link |
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US (1) | US20090047470A1 (ja) |
JP (1) | JPWO2007069355A1 (ja) |
CN (1) | CN101326383A (ja) |
WO (1) | WO2007069355A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016065596A (ja) * | 2014-09-25 | 2016-04-28 | 東芝三菱電機産業システム株式会社 | 耐衝撃性電気機器支持装置 |
WO2022079938A1 (ja) * | 2020-10-13 | 2022-04-21 | NatureArchitects株式会社 | 構造体、ケーシング、振動デバイス、および電子機器 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9241850B2 (en) | 2011-09-02 | 2016-01-26 | Ferno-Washington, Inc. | Litter support assembly for medical care units having a shock load absorber and methods of their use |
CN103366787A (zh) * | 2012-04-05 | 2013-10-23 | 鸿富锦精密工业(深圳)有限公司 | 移动硬盘 |
CN104833821B (zh) * | 2015-05-07 | 2017-11-03 | 深圳导远科技有限公司 | 环形悬挂式内隔振的惯性测量组件 |
EP3377357B1 (de) * | 2015-11-19 | 2019-09-04 | Behr-Hella Thermocontrol GmbH | Anzeigevorrichtung für eine fahrzeugkomponente |
FR3075908B1 (fr) | 2017-12-27 | 2020-09-25 | Airbus Operations Sas | Systeme d'amortissement comportant un dispositif amortisseur primaire et un dispositif amortisseur secondaire de raideurs differentes, structure et aeronef associes |
CN114614189B (zh) * | 2022-03-29 | 2024-05-24 | 东莞新能安科技有限公司 | 电池模组及电子装置 |
CN115231133A (zh) * | 2022-09-26 | 2022-10-25 | 济宁熹安科技信息有限公司 | 一种农副产品运输箱 |
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JPH07180740A (ja) * | 1991-02-04 | 1995-07-18 | Hutchinson Sa | 剛性可変弾性支持機構 |
JPH10196626A (ja) * | 1997-01-09 | 1998-07-31 | Shibata Ind Co Ltd | 衝撃吸収体および連結体 |
JP2004315087A (ja) * | 2003-03-31 | 2004-11-11 | Matsushita Electric Ind Co Ltd | 衝撃緩衝部材、それを用いた電子機器の衝撃緩衝方法およびそれらを用いた電子機器 |
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US6496326B1 (en) * | 1999-06-11 | 2002-12-17 | Seagate Technology Llc | Noise and vibration reduction in computer disk drives |
JP4353346B2 (ja) * | 2000-06-01 | 2009-10-28 | 富士通株式会社 | 電子機器および電子機器向け内蔵ユニット用緩衝部材 |
CN100470663C (zh) * | 2003-03-31 | 2009-03-18 | 松下电器产业株式会社 | 冲击缓冲部件、冲击缓冲方法以及使用它们的电子机器 |
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2006
- 2006-06-05 US US12/095,979 patent/US20090047470A1/en not_active Abandoned
- 2006-06-05 WO PCT/JP2006/311187 patent/WO2007069355A1/ja active Application Filing
- 2006-06-05 JP JP2007550073A patent/JPWO2007069355A1/ja active Pending
- 2006-06-05 CN CNA2006800465765A patent/CN101326383A/zh active Pending
Patent Citations (5)
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JPS6028546U (ja) * | 1983-08-02 | 1985-02-26 | カルソニックカンセイ株式会社 | 物入れ装置 |
JPH07180740A (ja) * | 1991-02-04 | 1995-07-18 | Hutchinson Sa | 剛性可変弾性支持機構 |
JPH10196626A (ja) * | 1997-01-09 | 1998-07-31 | Shibata Ind Co Ltd | 衝撃吸収体および連結体 |
JP2004315087A (ja) * | 2003-03-31 | 2004-11-11 | Matsushita Electric Ind Co Ltd | 衝撃緩衝部材、それを用いた電子機器の衝撃緩衝方法およびそれらを用いた電子機器 |
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JP2016065596A (ja) * | 2014-09-25 | 2016-04-28 | 東芝三菱電機産業システム株式会社 | 耐衝撃性電気機器支持装置 |
WO2022079938A1 (ja) * | 2020-10-13 | 2022-04-21 | NatureArchitects株式会社 | 構造体、ケーシング、振動デバイス、および電子機器 |
Also Published As
Publication number | Publication date |
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JPWO2007069355A1 (ja) | 2009-05-21 |
US20090047470A1 (en) | 2009-02-19 |
CN101326383A (zh) | 2008-12-17 |
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