JP2009193632A - Device supporting apparatus and electronic appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device supporting apparatus which can support variously assumed installation conditions such as replacement of types and models of a device and expansion, and which is flexible in design, and which can exhibit a vibration absorbing effect effectively and uniformly in a vehicle mounted data recording apparatus having a device such as an HDD. <P>SOLUTION: The device supporting apparatus has first and second mass bodies 3 and 4, at least one of which is a device to be installed in equipment, first, second and third buffer members 11, 12 and 13, a mounting member 21 and a chassis part 22. The first mass body 3 is attached to the mounting member 21 via the first buffer member 11, the second mass body 4 is attached to the mounting member 21 via the second buffer member 12, the mounting member 21 is attached to the chassis part 22 via the third buffer member 13, and a design value related to viscoelasticity of the first, second and third buffer members 11, 12 and 13 is a combination of values which have approximately the same amplitude in resonant frequencies of the first and second mass bodies 3 and 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a device support device that supports an information recording device or the like mounted on an electronic device, and more particularly to a device support device having a vibration isolation structure for suppressing vibration of a hard disk and an electronic device including the device support device. is there.

  In recent years, in-vehicle data storage devices and the like have been demanded for high-speed access to a storage medium and large-capacity recording, and those equipped with HDDs (hard disk drives) are widely used. However, a high-performance HDD that achieves high-speed access and large-capacity recording is more susceptible to disturbances caused by vibrations when the vehicle is moving. For example, when a magnetic head inside the HDD accesses a disk, vibration occurs. There is a problem that it is easy to cause an access error or failure. Therefore, when the HDD is mounted on a moving body such as a vehicle, it is essential to ensure the vibration proof property of the HDD.

  As a general method for improving the anti-vibration property of the HDD, there are a method of improving the anti-vibration property of the HDD itself, and a method of suppressing external vibration transmitted to the HDD by devising the HDD holding structure. is there. Of these methods, it is expected that the method for improving the vibration proofing property of the HDD itself will be difficult in consideration of future higher access speed and larger capacity (higher density). On the other hand, various methods have been proposed for the HDD holding structure.

  In recent years, disclosed examples include a technique for balancing HDD vibration and preventing vibration by holding a weight-attached HDD with a fixture and attaching the fixture to the apparatus via an anti-vibration rubber. For example, see Patent Document 1).

  Further, in the case where a plurality of HDDs are mounted on a PC, a configuration in which two HDDs are mounted on a housing via vibration-proof rubbers having different resonance frequencies, thereby suppressing resonance of the plurality of HDDs with each other, 2 A proposal has been made regarding a technique for attaching HDDs to a holding frame body and a holding box body via a cushioning material with respect to a stand HDD, and connecting the holding frame body and the holding box body and storing them in a storage unit (for example, (See Patent Documents 2 and 3).

In addition, as a vibration isolation technique when installing equipment, a vibration absorbing weight is attached to the equipment held on the base via the vibration isolation elastic body via another vibration isolation elastic body. A vibration absorber is disclosed (for example, see Patent Document 4).
Japanese Patent No. 3516468 JP 07-220465 A JP 2005-182936 A JP-A-11-101301

  Conventionally, the disclosed anti-vibration device has a basic structure in which an HDD is attached to a housing via a cushioning material. The same concept applies to a plurality of HDDs, and each HDD is individually attached to the chassis via a cushioning material. As a structure of the housing, a method of providing an HDD holding member (subframe) on the chassis is common. Further, as a measure for suppressing the resonance of the HDD, a vibration-proof weight (dummy) is used, and the vibration condition of the HDD is adjusted by adding the weight to the HDD via a cushioning material.

  However, the above method uses a cushioning material or a weight (dummy) as a design factor (design element) for determining a vibration isolation function in the HDD support device. Accordingly, the cushioning material and the weight cannot be used as independent constants. As a result, the shock-absorbing material and weight exert an anti-vibration effect only when used in an HDD support device for a specific HDD, and cannot cope with changes in HDD mounting conditions.

  On the other hand, the performance of HDD in recent years has remarkably evolved, and it is required to respond quickly to replacement and expansion of HDD models. For electronic devices equipped with precision equipment (devices) such as HDDs, there is a device with a high degree of design freedom and effective anti-vibration effects for various precision equipment mounting conditions. Realization of the support device has been an important issue.

  The present invention solves the above-described problems, and provides a device support device that can be used in an in-vehicle data storage device and the like, has excellent anti-vibration properties, and has a high degree of design freedom, and an electronic device equipped with the device support device. For the purpose.

  In order to achieve the above-described object, a device support apparatus of the present invention includes first and second mass bodies, at least one of which is a device for mounting an apparatus, and first, second, and third buffer members, An attachment member and a housing, and the first mass body is attached to the attachment member via the first buffer member, and the second mass body is attached to the attachment member via the second buffer member, respectively. The attachment member is attached to the housing through the buffer member, and the design values related to the viscoelasticity of the first, second and third buffer members are substantially the same at the resonance frequency of the first and second mass bodies. It is a combination of numerical values.

  With such a configuration, the device support apparatus of the present invention can make the amplitudes at the resonance frequencies of the first and second mass bodies to be mounted substantially the same. Therefore, in a vehicle-mounted data recording apparatus or the like equipped with a device such as an HDD, a uniform vibration-proofing effect can be exhibited with respect to the two devices to be supported with respect to various assumed device mounting conditions. The degree of freedom in design is also high. As a result, it is possible to quickly respond to the replacement and expansion of the type and model of the device to be mounted in response to the higher performance of the device. In particular, it is possible to provide a high-quality device support device that exhibits an effect in an electronic device such as an in-vehicle data recording device and is excellent in vibration isolation.

  In the device support apparatus of the present invention, the first and second mass bodies are attached to the attachment members at the attachment portions disposed on the side portions. With such a configuration, the first and second mass bodies can be attached to the attachment member on the side surface, and the attachment member can be attached to the housing on the bottom surface. Therefore, the first and second mass bodies can be attached to the housing via two independent buffer portions disposed on the side surface portion and the bottom surface portion with respect to the housing. Thereby, the buffer design can be independently performed with respect to the vibration and impact in the vertical direction and the horizontal direction applied to the first and second mass bodies, and an effect can be exhibited in optimization of vibration suppression.

  Moreover, the device support apparatus of this invention is provided with the housing attachment part in which an attachment member has a substantially L-shaped cross section. With such a configuration, the attachment member can hold the first and second mass bodies on the side surface via the buffer member and can be attached to the housing on the bottom surface via the buffer member. Therefore, the structure regarding attachment of the 1st and 2nd mass body can be simplified.

  In the device support apparatus of the present invention, the first and second mass bodies are a device and a dummy mass body. With such a configuration, by using a dummy mass body, a device support apparatus capable of supporting two devices exhibits a uniform anti-vibration effect on the device even if only one device is supported. It becomes possible to do. Therefore, it is possible to realize a device support apparatus having excellent convenience.

  In the device support apparatus of the present invention, the first and second mass bodies are devices of the same type or different types. With such a configuration, the same type or different types of devices can be supported, and a uniform anti-vibration effect can be exerted on the two supported devices. Accordingly, it is possible to quickly respond to the types and types of devices to be installed and the replacement and expansion of models. In particular, it is possible to provide a high-quality device support device that exhibits an effect in an electronic device such as an in-vehicle data recording device and is excellent in vibration isolation.

  In addition, the device support apparatus of the present invention is designed to match the masses of different kinds of devices having different masses by attaching a weight as a third mass body to one of the devices, and is uniform with respect to the two devices to be supported. It is possible to exhibit a vibration isolation effect. Accordingly, it is possible to quickly respond to the types and types of devices to be installed and the replacement and expansion of models. Thereby, the device support apparatus provided with the outstanding convenience is realizable.

  Moreover, in the device support apparatus of this invention, a mounting member is comprised so that a dissimilar device can be attached. Therefore, when mounting different types of devices, the devices can be switched without replacing the mounting member. Therefore, a highly efficient and convenient device support apparatus can be realized.

  In the device support device of the present invention, the device is at least one of an information storage device and an information recording / reproducing device. Therefore, an effect can be exhibited when an information storage device such as a hard disk and an information recording / reproducing device such as a CD player or a DVD player are mounted. Therefore, a highly convenient device support apparatus that can be used in a wide range of devices can be realized.

  The electronic apparatus of the present invention includes the device support device of the present invention, and is configured to be able to switch the type or model of the device mounted on the support device. Therefore, a uniform anti-vibration effect can be exhibited for the two devices to be supported with respect to various device mounting conditions. The degree of freedom in design is also high. As a result, it is possible to quickly respond to the replacement and expansion of the type and model of the device to be mounted in response to the higher performance of the device. In particular, the present invention is effective in an in-vehicle data recording device equipped with a hard disk or the like, and can provide an electronic device that is excellent in vibration proofing, high quality, high functionality, and high convenience.

  In the electronic apparatus of the present invention, the housing part of the device support apparatus is a housing part of the apparatus in which the device support apparatus is disposed. Therefore, the housing part of the device support device can be configured using the housing part of the device, which is effective in simplifying the structure of the device on which the device support device is mounted. As a result, it is possible to provide a highly functional and highly convenient electronic device that has a simple structure and excellent vibration isolation.

  According to the present invention, the amplitude at the resonance frequency can be made substantially the same for the two devices to be mounted, and in a vehicle data storage device or the like, it is homogeneous and superior to devices mounted under various conditions. Anti-vibration effect can be exhibited. Therefore, it is possible to provide a device support device that is capable of promptly responding to device type and model exchange, expansion, and the like, and that has a high degree of design freedom and an electronic device equipped with the device support device.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment)
An example of a device support apparatus (hereinafter also abbreviated as “support apparatus”) in the embodiment of the present invention will be described below.

  First, an outline of a simple configuration and function when the support device is used in an electronic apparatus will be described with reference to FIG.

  FIG. 1 is a main part configuration diagram showing an outline of an electronic apparatus provided with a device support apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, a support device 2 is provided in the electronic apparatus 1, and the support device 2 has four forms as a method for supporting a device represented by an HDD or the like. FIG. 1A shows a case where the HDD 3 (H1) as the first mass body and the HDD 4 (H1) as the second mass body are supported, and two HDDs (H1) of the same type are supported. ing. FIG. 1B shows a case where HDD 5 (H2) is supported instead of HDD 4 (H1), and H1 and H2 which are HDDs of different models are supported. Further, FIG. 1C shows a case where a CD player 6 (C 1) is supported as an example of another device instead of the HDD 4 or 5. FIG. 1D shows a case where only one device (H1) is supported and a dummy mass 7 (DM) is supported as a second mass body instead of the removed device.

  Next, a detailed configuration of the support device 2 that is a feature of the configuration of the embodiment of the present invention will be described with reference to FIG.

  FIG. 2 is a plan view and a side view showing the main configuration of the support device 2 in the embodiment of the present invention. FIG. 2 illustrates a case where the support device 2 supports two HDDs (H1) of the same type.

  The support device 2 includes the HDD 3 as the first mass body, the HDD 4 as the second mass body, the mounting member 21, the housing portion 22, and the three buffer members 11a, 11b, 11c, 11d, 12a, 12b, 12c, 12d, 13a, 13b, 13c, 13d. The HDD 3 is attached to the attachment member 21 via the first buffer members 11a, 11b, 11c, and 11d having the same viscoelastic characteristics, and the HDD 4 is similarly attached to the attachment member 21 via 12a, 12b, 12c, and 12d. It is attached to the member 21. Further, the attachment member 21 is attached to the housing portion 22 via third buffer members 13a, 13b, 13c, and 13d having the same characteristics.

  Next, a configuration in the case where two different devices are mounted and supported on the support device 2 will be described with reference to FIG. FIG. 3 is a side view showing the characteristics of the device mounting method in the support apparatus 2. FIG. 3A shows a case of supporting the same type of device (H1), which has already been described. On the other hand, when a different kind of device is supported, the adjustment mass is used as the third mass body. As shown in FIG. 3B, when one of the devices to be supported is replaced with the HDD (H2), the adjustment mass M1 is attached to H2, and the masses of H1 and H2 are made equal. Thereby, the conditions regarding the mass of the vibration system in the support device 2 can be maintained the same as in the case of FIG.

  Similarly, as shown in FIG. 3C, when one of the supporting devices is replaced with the CD player (C1), the adjustment mass M2 is attached to C1, and the masses of H1 and C1 are made equal. When the dummy mass (DM) shown in FIG. 3D is supported instead of the second device, the mass of DM is set equal to H1. With the above configuration, the support device 2 can maintain the vibration system conditions constant when supporting the same type and different types of devices.

  Next, requirements constituting the vibration system, which is a feature of the support device 2 in the embodiment of the present invention, will be described with reference to FIG.

FIG. 4A shows a vibration system of the support device 2, and FIG. 4B shows an example of a vibration system applied to a conventional support device. As shown in FIG. 4 (a), the supporting device 2 first mass _{M 0} and the second mass body _{M 1} independently of the buffer member _{(damper) (K 0, C 0)} and _(K 1, C by supporting each further third independent cushioning member (K _{2, C 2)} via a supporting a structure P formed by integrating the mass M _0, M ₁ to the substrate B by ₁₎ mass One of the bodies M ₀ and M ₁ is modeled as a two-degree-of-freedom dynamic vibration absorber with a dummy mass, and the resonance mode is calculated as a design value (viscoelastic coefficient) related to the viscoelasticity of the three types of buffer members. Can be set freely.

Here, the equation of motion of the vibration system of FIG. 4A is expressed as follows.
_{M 0 (X 0) "=} (- K 0 + K 0 K 0 / K 2) X 0 + (K 0 K 1 / K 2) X 1
−C ₀ (X ₀ ) ′ + Qsin (ωt) (1)

_{M 1 (X 1) "=} (K 0 K 1 / K 2) X 0 + (- K 1 + K 1 2 / K 2) X 1
-C ₁ (X ₁ ) '(2)

Similarly, the equation of motion of the vibration system of FIG. 4B is expressed as follows.
_{M 0 (X 0) "=} - K 0 X 0 + K 0 X 1 -C 0 (X 0) '··· (3)

M ₁ (X ₁ ) ″ = K ₀ X ₀ − (K ₀ + K ₁ ) X ₁ −C ₁ (X ₁ ) ′
+ Qsin (ωt) (4)
Here, X represents the amount of mutation of the mass M, X ′ represents velocity, and X ″ represents acceleration.

  In general, a dynamic vibration absorber is considered to have the highest vibration isolation effect when the following two conditions are satisfied. That is, (A) there are two points that always pass regardless of the attenuation rate in the relationship diagram of frequency and amplitude (FIG. 7 (b)), and the amplitude corresponding to this frequency should be the same size, (B) It has an extreme value of amplitude at the above frequency. In the actual design, the above frequency may be used as the frequency of the resonance point (resonance frequency).

For the mass M ₀ , the above two conditions are F1 (M _0,1 K _0,1,2 C _0,1,2 ) = 0 (5a)
F2 (M _0,1 K _0,1,2 C _0,1,2 ) = 0 (5b)
The two conditions with respect to the mass _{M 1} is _{F3 (M 0,1 K 0,1,2 C 0,1,2} ) = 0 ··· (6a)
F4 (M _0,1 K _0,1,2 C _0,1,2 ) = 0 (6b)
Here, if M _0, C _0,1,2 are fixed, there are four variables M ₁ and K _{0,1,2 and} the four variables of the above formulas (5a), (5b), (6a), (6b). Is uniquely determined from the equation
As a special case, when M ₀ = M ₁ and K ₀ = K ₁ (the structure is indistinguishable between M ₀ and M ₁ ), the two masses are in the same vibration mode, and one vibration isolation condition is the same as the other Match.
That is,
F1 (M ₀ K _0,2 C _0,2 ) = 0 (7)
F2 (M ₀ K _0,2 C _0,2 ) = 0 (8)
_Here, if _{M 0, 1} and _{C 0, 1, 2} are fixed equation (7), (8) becomes two yuan simultaneous equations to _{K 0, 2, K 0, 2} is uniquely determined.

  Next, application examples relating to the configuration of the support device 2 are shown in FIGS.

  FIG. 5 is a plan view and a side view showing an application example relating to the configuration of the support device 2, and FIG. 6 is a perspective view showing an embodiment when the support device 2 is arranged in an electronic device such as an in-vehicle data storage device. Each is shown. As shown in FIG. 5, in the support device 2, a U-shaped attachment member 23 is attached to the housing portion 24 of the electronic device via four buffer members 13 a, 13 b, 13 c, and 13 d. In this configuration, the housing portion of the support device 2 and the housing portion of the electronic device are integrated, and the configuration when the support device 2 is disposed in the electronic device is simplified. FIG. 6 shows a specific embodiment of the configuration shown in FIG. As shown in FIG. 6, the device 3, the dummy mass body 7, and the attachment member 23 are attached with stepped screws 14 through the buffer members 11, 12, and 13, respectively.

  In the example shown in FIGS. 5 and 6, the device 3 and the dummy mass body 7 have screw portions (for example, 3a, 3b, 7a, 7b in FIG. The buffer member 11 and the dummy mass body 7 are attached to the attachment member 23 on the side surfaces via the buffer member 12, respectively.

  Further, as shown in FIGS. 5A and 5B, the mounting member 23 includes housing mounting portions 23a and 23b having a substantially L-shaped cross section, and the mounting member 23 is a housing mounting portion 23a. , 23b are attached to the housing part 24 via the buffer member 13.

  Further, in the example shown in FIG. 6, the mounting member 623 is composed of three members 623a, 623b, and 623c, and the mounting member 623a is partially L-shaped and includes housing mounting portions 623aa and 623ab. In addition, the mounting member 623a is fixed to the housing portion in the housing mounting portions 623aa and 623ab. Similarly, the attachment member 623b includes housing attachment portions 623ba and 623bb (not shown).

  The mounting members 23 and 623 shown in FIGS. 5 and 6 are U-shaped, but the same effect can be achieved by using a plurality of columnar bending members or mold members such as L-shaped metal fittings. Can do.

  With such a configuration, it is possible to attach the device 3 and the dummy mass body 7 to the attachment member 23 at the side surfaces, and further attach the attachment member 23 to the housing 24 at the bottom surface portion. Therefore, the device 3 and the dummy mass body 7 can be attached to the housing 24 through two independent buffer portions disposed on the side surface portion and the bottom surface portion with respect to the housing 24. Thereby, the buffer design can be independently performed with respect to the vibration and impact in the vertical direction and the horizontal direction applied to the device 3 and the dummy mass body 7, and the effect of optimizing the vibration suppression is exhibited.

  Further, the mounting member 23 includes a housing mounting portion having a substantially L-shaped cross section, thereby holding the device 3 and the dummy mass body 7 on the side surface via the buffer members 11 and 12 and buffering on the bottom surface portion. It can be attached to the housing via the member 13. Therefore, the structure regarding attachment of the device 3 and the dummy mass body 7 can be simplified.

Further, FIG. 7 is a diagram showing a simulation result of the anti-vibration characteristics in the support device shown in FIG. 4B (the same characteristics are shown in the case of the support device 2 in FIG. 4A). FIG. 7A shows the amplitude at the resonance frequency of the mass body in the vibration system of the support device without the dummy mass, and FIG. 7B shows the resonance frequency of the two mass bodies in the vibration system of the support device with the dummy mass. The amplitude at is shown. The support device has substantially the same amplitude at the resonance frequency of the two mass bodies, and exhibits a clear anti-vibration effect as compared with the vibration system having the conventional configuration. Each parameter of the vibration system in FIG. 7 _{(b), M 0 = 20Kg, M 1} = 14Kg, K 0 = 1000000N / m, K 1 = 9000000N / m, C 0 = C 1 = 1000N * S / m This is a characteristic when a vibration of 1000 N is applied to this vibration system.

  With the above configuration, in the support device 2, the vibration system is kept constant even when the configuration of the device to be mounted is switched as shown in FIG. By calculating and combining the design values related to the viscoelasticity of the buffer members 11, 12, and 13, the amplitude at the resonance frequency of the two devices to be mounted can be made substantially the same, and the anti-vibration effect can be exhibited. As a result, it is possible to quickly respond to the exchange and expansion of the types and models of devices to be mounted without changing the basic concept or structure.

  As described above, by using the support device according to the embodiment of the present invention, the amplitude at the resonance frequency can be made substantially the same for the two mounted devices, and the in-vehicle data recording device mounted with the device Thus, it is possible to exhibit a uniform vibration-proofing effect for devices mounted under various conditions. Therefore, it is possible to provide a highly functional and highly convenient device support apparatus that can quickly respond to device type and model replacement, expansion, and the like, and an electronic device equipped with the device support apparatus. .

  The support device according to the present invention is useful as a device support device in an electronic device that needs to cope with the exchange and expansion of device types and models.

The principal part block diagram which shows the outline | summary of the electronic device which arrange | positioned the device support apparatus in embodiment of this invention The top view and side view which show the main structures of the device support apparatus in embodiment of this invention Side view showing the characteristics of the device mounting method of the same device Explanatory drawing showing the characteristics of the vibration system in the device Plan view and side view showing an application example related to the configuration of the apparatus The perspective view which shows the Example at the time of arrange | positioning the apparatus to an electronic device The figure which shows the simulation result of the vibration proof characteristic of the vibration system in the same device

Explanation of symbols

1 Electronic equipment 2 Device support device 3, 4, 5 Hard disk (device)
3a, 3b Mounting part (screw part)
6 CD player 7 Dummy mass (weight)
7a, 7b Mounting part (screw part)
11, 11a, 11b, 11c, 11d, 12, 12a, 12b, 12c, 12d,
13, 13a, 13b, 13c, 13d Buffer member (anti-vibration rubber)
14 Stepped screw 21, 23, 623, 623a, 623b, 623c Mounting member 23a, 23b, 623aa, 623ab, 623ba Housing mounting portion 22, 24 Housing portion M1, M2 Adjustment mass

Claims (10)

At least one of the first and second mass bodies, which is a device mounted device, first, second and third buffer members, an attachment member, and a housing portion, the first buffer member The first mass body is attached to the attachment member via the second buffer member, and the second mass body is attached to the attachment member via the second buffer member, and the attachment member is attached to the attachment member via the third buffer member. The design value related to the viscoelasticity of the first, second and third buffer members is a combination of numerical values so that the amplitude at the resonance frequency of the first and second mass bodies is substantially the same. A device support apparatus. The device support apparatus according to claim 1, wherein the first and second mass bodies are attached to the attachment member at attachment portions disposed on side surfaces, respectively. The device support apparatus according to claim 2, wherein the attachment member includes a housing attachment portion having a substantially L-shaped cross section. The device support apparatus according to claim 1, wherein the first and second mass bodies are a device and a dummy mass body. The device support apparatus according to claim 1, wherein the first and second mass bodies are the same type or different types of devices. The device supporting apparatus according to claim 5, wherein a third mass body is attached to one of the different types of devices. The device mounting apparatus according to claim 5, wherein the mounting member is configured to be capable of mounting different types of devices. The device support apparatus according to claim 1, wherein the device is at least one of an information storage apparatus and an information recording / reproducing apparatus. An electronic apparatus comprising the device support device according to any one of claims 1 to 8, and configured to be able to switch a type or model of a device mounted on the device support device. The electronic device according to claim 9, wherein the housing portion is a housing portion of a device in which the device support device is disposed.

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