JP2013124705A - Vibration isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolation device which can isolate continuous and small vibration generated as a mobile body moves, and also can quickly absorb to isolate sudden and large vibration (impact).SOLUTION: The vibration isolation device 1, which is provided and interposed when a camera K is fixed to the mobile body B to isolate vibration generated as the mobile body moves, includes: a support plate 2 for supporting the camera; a mounting plate 3 disposed so as to oppose this support plate and mounted on the mobile body; and a vibration isolation mechanism 10 provided between the support plate and the mounting plate, wherein the vibration isolation mechanism includes a coil spring (elastic member) 11 provided across the support plate and the mounting plate, a viscoelastic sheet resin (viscoelastic member ) 12 provided on the elastic member so as to absorb energizing force in an expansion and contraction direction of this coil spring, and a magnet 13 provided on the mounting plate to impart magnetic force so as to control the vertical movement of the support plate.

Description

  The present invention relates to a vibration isolator, and more particularly to a vibration isolator for a photographing camera installed on a moving body.

  In general, when a shooting camera is placed on a moving body such as a bicycle, a motorcycle, or a vehicle such as an automobile, the moving body shakes due to the vibration caused by the movement and the image is blurred. Uses a vibration isolator. For example, the vibration isolator is a camera crane vibration isolator for suspending the camera at the tip of the crane, which is a coiled spring that is laid down and a crane body suspension end that is disposed on the lower periphery of the coiled spring. There is known a first receiving surface connected to the side and a second receiving surface disposed on the upper circumference of the coiled spring so as to face the first receiving surface and connected to the camera side ( (See Patent Document 1).

  In addition, as an anti-vibration device using a sensor, for example, in a camera equipped with an anti-vibration mechanism that corrects image blur caused by camera shake, a movement operation between two positions of an anti-vibration effective position and an anti-vibration invalid position A possible anti-vibration operation member is provided in the camera body as an operation member separate from the release button, and when the anti-vibration operation member is located at the anti-vibration effective position, the anti-vibration mechanism is capable of performing anti-vibration operation. There has been proposed a structure in which the vibration isolation mechanism is disabled when the operation member is positioned at the vibration isolation invalid position.

  However, the vibration isolator used for the above-described crane has a large configuration. In addition, in a vibration isolator that uses a sensor to prevent vibration, the information is obtained from the sensor, and thus the apparatus is complicated. Therefore, conventionally, a vibration isolator that can be prevented without increasing the size and without using a sensor has been proposed (see, for example, Patent Document 3).

  This vibration isolator includes a coil spring and a viscoelastic sheet provided on the peripheral surface of the coil spring, and the viscoelastic sheet follows the arc shape on the outer peripheral side in the longitudinal sectional contour of the wire of each coil. A crimping portion that constrains the strands in the longitudinal direction of the coil spring by adhering, and a curve that connects the crimping portions adjacent to each other while curving toward the central axis of the coil spring within the gap between the strands of adjacent coils. Part. When the coil spring expands and contracts due to vibration, the vibration isolator is configured such that the bending portions of the coils adjacent to each other with the crimping portions of the coils constraining the strands at various locations along the longitudinal direction of the coil spring. By coordinating with the displacement and bending inwardly toward the central axis of the coil spring, it exerts viscous resistance to attenuate the expansion and contraction of the coil spring.

JP 2008-263514 A JP 2007-171708 A JP 2005-207589 A

However, the above-described vibration isolator has the following problems.
In the conventional vibration isolator, for example, it is effective for both continuous small vibration accompanying movement of the moving body and sudden large vibration generated by moving the moving body on, for example, unevenness. Although it is necessary, especially for images shot by a camera, it is desired to absorb vibrations and absorb vibrations more quickly when sudden large vibrations (impacts) occur. It was.

  The present invention was devised in view of the above-described problems, and can continuously suppress small vibrations generated as the moving body moves, and can quickly absorb sudden large vibrations (impacts). It is an object of the present invention to provide a vibration isolator capable of isolating vibration.

  In order to solve the above problems, the vibration isolator according to the present invention has the following configuration. That is, the vibration isolator is provided when the imaging camera is fixed to the moving body, and in the anti-vibration apparatus that prevents the vibration generated with the movement of the moving body, the support portion that supports the imaging camera And an attachment part that is disposed so as to face the support part and is attached to the moving body, and an anti-vibration mechanism that is provided between the support part and the attachment part. At least one of an elastic member provided across the support portion and the attachment portion, a viscoelastic member provided on the elastic member so as to absorb a biasing force in the expansion / contraction direction of the elastic member, and the support portion and the attachment portion And a magnet for applying a magnetic force so as to suppress the vertical movement of the support portion.

  With such a configuration, the vibration isolator has the attachment portion installed on the moving body, and takes an image with the photographing camera while moving the moving body with the photographing camera supported on the support portion. When the moving body moves, vibration is always transmitted from the road surface state to the photographing camera via the vibration isolator, but the vibration is absorbed by the elastic member, the viscoelastic member, and the magnet of the vibration isolating mechanism. . In addition, even if a sudden large vibration (impact) occurs in the moving body, the elastic member and the magnet are expanded or contracted once, and then the elastic member and the magnet are operated in a contracting direction when the elastic member is expanded. When the elastic member contracts, the vibration of the elastic member is absorbed by acting so as to relax the operation in the extending direction.

  In the vibration isolator, the support portion and the attachment portion are formed of a metal plate, the elastic member is formed of a coil spring, and the viscoelastic member is provided on a peripheral edge of the coil spring. The magnet is installed on at least one of the metal plates, and the installation location is inside the coil spring.

  With such a configuration, the vibration isolator is such that the viscoelastic sheet resin always suppresses the urging force to expand and contract the coil spring by viscoelasticity, and even if a sudden large vibration (impact) occurs from the moving body, The vibration is absorbed by suppressing the next contraction from the extension of the coil spring or the next extension from the contraction. The magnet, together with the viscoelastic sheet resin, relaxes the operation of the coil spring with a magnetic force to minimize the influence on the vibration to the photographing camera.

  In the vibration isolator, the magnet is a first magnet installed on the metal plate as the mounting portion, and a second magnet installed on the metal plate as the support portion so as to face the first magnet. The first magnet and the second magnet are formed so that the surfaces facing each other are different magnetic poles, and the magnets do not contact each other in the minimum contracted state of the coil spring. It is good also as a structure installed at intervals like this.

  With this configuration, the vibration isolator is restrained so that the position of the support plate supporting the photographing camera remains at a fixed position because the first magnet and the second magnet face each other and exert a magnetic force. Along with the viscoelastic sheet resin, vibration from the moving body is absorbed so that the support plate does not vibrate.

  Further, in the vibration isolator, the magnet is a first magnet installed on the metal plate as the attachment portion, and a second magnet installed on the metal plate as the support portion so as to face the first magnet. The first magnet and the second magnet are formed in a cylindrical shape, and the other is formed in a cylindrical shape or a rod shape having a diameter that can be inserted inside the first magnet, The second magnet is installed so as to have a positional relationship in which the second magnet enters and separates inside the first magnet, and the second magnet faces the magnetic pole of the peripheral surface of the first magnet and the peripheral surface of the first magnet. It was set as the structure formed so that the magnetic pole of the surrounding surface may become the same magnetic pole.

  With this configuration, the vibration isolator is in a state where it remains in a predetermined position due to the effect of repulsion of the magnetic force between the first magnet and the second magnet, and the expansion and contraction operation of the coil spring occurs due to the vibration of the moving body. Even so, in combination with the viscoelastic sheet resin, it acts to suppress the expansion and contraction of the coil spring and absorbs vibration transmitted from the moving body to the photographing camera.

  In the vibration isolator, the magnet is a first magnet installed on the metal plate as the mounting portion, and a second magnet installed on the metal plate as the support portion so as to face the first magnet. The first magnet and the second magnet are formed in a cylindrical shape, and the other is formed in a cylindrical shape or a rod shape having a diameter that can be inserted inside the first magnet, The second magnet is installed so as to have a positional relationship in which the second magnet enters and separates inside the first magnet, and the second magnet faces the magnetic pole of the peripheral surface of the first magnet and the peripheral surface of the first magnet. It was set as the structure formed so that it might become a different magnetic pole from the magnetic pole of the surrounding surface.

  With such a configuration, the vibration isolator is in a state of staying at a predetermined position due to the effect of attracting the magnetic force between the first magnet and the second magnet, and the expansion and contraction operation of the coil spring occurs due to the vibration of the moving body. However, in combination with the viscoelastic sheet resin, it acts to suppress the expansion and contraction of the coil spring and absorbs vibration transmitted from the moving body to the photographing camera.

  And in the said vibration isolator, the said magnet is installed in the metal plate which is the said support part so that the 1st magnet installed in the metal plate which is the said attachment part, and this 1st magnet may be opposed. The first magnet and the second magnet are formed in a cylindrical shape, and the other is formed in a cylindrical shape or a rod shape having a diameter that can be inserted inside the first magnet, The first magnet is installed so that the second magnet enters and separates from the inside of the first magnet, and the magnetic poles on the circumferential surface of the first magnet are S pole and N pole or N pole and S pole in the height direction. The magnetic poles on the peripheral surface of the second magnet are formed so as to be N and S poles or S and N poles in the height direction.

  With this configuration, the vibration isolator is in a state where it tends to stay at a predetermined position due to the influence of the magnetic force between the first magnet and the second magnet. Along with the elastic sheet resin, it acts to suppress the expansion and contraction of the coil spring and absorbs vibration transmitted from the moving body to the photographing camera.

Further, in the vibration isolator, the viscoelastic sheet resin is disposed so as to be continuous in the height direction of the coil spring across the wire of the coil spring and at a predetermined interval in the circumferential direction. You may comprise.
With such a configuration, the vibration isolator uses a plurality of viscoelastic sheet resins in a belt shape, thereby suppressing the biasing force due to the elasticity of the coil spring and absorbing the vibration from the moving body together with the magnet.

The vibration isolator according to the present invention has the following excellent effects.
The vibration isolator includes an elastic member, a viscoelastic member, and a magnet, thereby preventing continuous small vibration accompanying movement of the moving body, and even if sudden large vibration (impact) occurs, By expanding and contracting the elastic member due to elasticity, the viscoelasticity of the viscoelastic member and the magnetic force of the magnet are moderately relaxed to suppress large vibrations. The impact can be minimized. For this reason, by installing the moving body and using the vibration control device, it is possible to shoot a video at a level that can be broadcast with the photographic camera.

  Since the vibration isolator is provided with the first magnet and the second magnet on the mounting plate and the support plate, respectively, the return from the expansion / contraction operation due to the elasticity of the coil spring due to the influence of the magnetic force and the viscoelasticity of the viscoelastic sheet resin. Since the vibration of the moving body is absorbed by suppressing the vibration, it is effective particularly for a small photographic camera of 3 kg or less, more preferably 1 kg or less, and it is possible to shoot a video without getting sick.

  The vibration isolator is provided with a first magnet and a second magnet on the mounting plate and the support plate, respectively, and absorbs vibrations from the moving body due to the influence of the magnetic force so that the position of the support plate is always at a predetermined position. Since it suppresses, the vibration (impact) from a moving body is absorbed together with viscoelastic sheet resin, and the influence of the vibration with respect to the image | video of a photographing camera can be made smaller.

The anti-vibration device has one of the first magnet and the second magnet formed in a cylindrical shape and the other facing the inside thereof, so that the vertical direction that is the vertical direction that causes vibration accompanying the movement of the moving body In addition to this vibration, it is possible to suppress the vibration in the horizontal direction perpendicular to the vertical direction by the magnetic force.
The vibration isolator is a viscoelastic sheet resin having the same thickness by adjusting the viscoelastic sheet resin in the height direction of the coil spring and providing the viscoelastic sheet resin at a predetermined interval in the circumferential direction. However, it will be possible to expand the range of design.

It is a perspective view which shows typically the state which installed the vibration isolator which concerns on this invention in the handle | steering_wheel of the bicycle which is a moving body. FIG. 2 is an exploded perspective view schematically showing the whole of the vibration isolator according to the present invention in a cross-sectional view, partially exploded. It is sectional drawing of the vibration isolator which concerns on this invention, (a) is sectional drawing which shows the stationary state of a vibration isolator, (b) is sectional drawing which shows the contraction state of a vibration isolator. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the vibration isolator which concerns on this invention, (a) is a side view which shows typically the stationary state of a vibration isolator, (b) is a side view which shows typically the contraction state of a vibration isolator, c) is a side view schematically showing how the vibration isolator returns from a contracted state to a stationary state. It is a graph which shows the relationship between the amplitude of vibration of the vibration isolator which concerns on this invention, and elapsed time. (A)-(d) is sectional drawing which shows typically the other structure of the vibration isolator which concerns on this invention, respectively. It is a front view which shows typically the other structure in the viscoelastic sheet resin of the vibration isolator which concerns on this invention.

  Hereinafter, a vibration isolator according to the present invention will be described with reference to the drawings. Here, the vibration isolator will be described as an example of a moving body in which a bicycle is used by being supported by a support arm, but the moving body is not particularly limited.

  As shown in FIG. 1, the vibration isolator 1 includes a support plate 2 as a support portion that supports the photographing camera K, and an attachment plate 3 as an attachment portion that is attached to a support arm Sa supported by the handle H of the bicycle B. And an anti-vibration mechanism 10 provided across the support plate 2 and the mounting plate 3. The photographing camera K is a lightweight camera having a weight of 200 g to 3 kg (preferably less than 100 g to 1 k).

  As shown in FIGS. 1 and 2, here, the support plate 2 is formed in a rectangular shape with a metal plate such as iron, which is a ferromagnetic material, and supports a convex portion protruding from the photographing camera K on one side thereof. Support screw holes 2a are formed as support means. In addition, it is preferable that the support screw hole 2a formed in the support plate 2 is provided without penetrating. Further, the support plate 2 has a screw formed on the convex portion of the photographing camera K. In addition, this support plate may be configured such that a convex portion as provided on a general camera tripod is formed, and a screw is formed on the convex portion, and the camera K is detachably supported. The configuration is not limited as long as it can be configured.

  The mounting plate 3 is installed in parallel to the support plate 2 by the vibration isolation mechanism 10 so as to face the support plate 2. The mounting plate 3 is formed with a mounting screw hole 3a so that the mounting plate 3 is screwed and attached by a screw portion protruding from the support arm Sa. In addition, it is preferable that the attachment plate 2 is formed with a thickness so that the attachment screw hole 3a does not penetrate. Here, the mounting plate 3 is formed of a metal plate of the same quality as the support plate 2. However, if the magnet has a strength capable of withstanding vibration by installing a magnet, the mounting plate 3 is made of stainless steel, aluminum alloy, or the like. It doesn't matter.

  As shown in FIGS. 2 and 3, the vibration isolation mechanism 10 includes a coil spring 11 that is an elastic member, and a viscoelastic sheet that is a viscoelastic member provided so that a bent portion faces the outer peripheral side of the coil spring 11. A resin 12 and a magnet 13 provided on the mounting plate 3 are provided. In the vibration isolating mechanism 10, one or both of the coil spring 11 and the viscoelastic sheet resin 12 are attached to the support plate 2 and the attachment plate 3.

  The coil spring 11 is installed between the support plate 2 and the mounting plate 3 and is generated when the bicycle B (see FIG. 1) travels (small vibration: first vibration) and when the road surface is uneven. The vibration is expanded and contracted by vibration (large vibration: second vibration). The coil spring 11 is configured in a state where it can be elastically deformed in the contraction direction and the extension direction in a state where the gap between the spring strands is opened in a stationary state. The material of the coil spring 11 may be a spring steel material or a synthetic resin.

  The viscoelastic sheet resin 12 is for absorbing (attenuating) vibration associated with expansion and contraction of the coil spring 11 so as not to affect the image of the photographing camera K (for example, shear deformation). In addition, it transforms deformation force into thermal energy and attenuates vibration). The viscoelastic sheet resin 12 has a property that combines both viscosity and elasticity, and is formed by forming a polymer material such as plastic into a sheet shape. The viscoelastic sheet resin 12 is, for example, a synthetic resin (plastic) (polyvinyl chloride, polyethylene, phenol resin, etc.), silicone resin (silicon rubber, silicone oil), synthetic fiber (nylon, vinylon, polyester, polyethylene) as a synthetic polymer. Terephthalate, etc.) or synthetic rubber formed into a sheet shape is used. As an example of a specific product, the viscoelastic sheet resin 12 uses a viscoelastic body made of an acrylic polymer having excellent weather resistance, which is used in a VEM structural damper sold by Sumitomo 3M Limited. be able to.

  As shown in FIGS. 3 (a) and 3 (b), the viscoelastic sheet resin 12 is here connected between a joint 12a that is welded or bonded to each spring wire inside the coil spring 11 and the joint 12a. Thus, the coil spring 11 is provided with a bent portion 12b positioned as a state bent outward from the spring element wire. Then, as shown in FIG. 3B, the viscoelastic sheet resin 12 is in a state in which the bent portion 12b is bent outward from between the spring strands when contracted from the stationary state, and thereafter, FIG. ), The coil spring 11 absorbs vibrations by suppressing the elastic force of the coil spring 11 by viscous resistance (viscoelasticity) so that the coil spring 11 gradually returns from a contracted state to a stationary state. It is attenuated.

  The viscoelastic sheet resin 12 is provided between all the spring wires of the coil spring 11 and is also provided so as to be bonded to the support plate 2 and the mounting plate 3 by welding or using an adhesive. The viscoelastic sheet resin 12 is adjusted by the type, installation area, and sheet thickness of the resin and is supported by the support plate 2 in order to suppress (attenuate) vibration due to the stretching force of the coil spring 11. Corresponding to the weight range supported by the camera K, it can be set as appropriate.

  In addition, the viscoelastic sheet resin 12 has fluidity like a fluid, exhibits a force due to viscous resistance (a force proportional to the deformation speed is generated), and has an elastic property like a spring, It is a polymer material that exhibits dynamic behavior with the feature of exerting a force proportional to deformation. The viscoelastic sheet resin 12 has a low viscous resistance when the deformation speed is low, and the spring element exhibits a dominant behavior, and when a high deformation speed is applied like an impact force, the viscous resistance element 12 Becomes larger and generates a large reaction force. The viscoelastic sheet resin 12 has a structure in which long molecular chains are entangled in the polymer material used, and when the deformation is applied, the chains extend or contract. Friction resistance exhibits vibration energy absorption effect. The viscoelastic sheet resin 12 generates intermolecular frictional resistance, and as a result, the viscoelastic sheet resin 12 generates a little heat as a whole, is converted into thermal energy, and absorbs vibration.

  A magnet (first magnet) 13 cooperates with the viscoelastic sheet resin 12 to absorb (attenuate) vibration accompanying expansion and contraction of the coil spring 11 and holds the position of the support plate 2 constant by magnetic force. Is for. Here, the magnet 13 is a rare earth magnet (rare earth magnet), for example, a neodymium magnet mainly composed of neodymium, iron, or boron. As shown in FIG. 3 (a), the magnet 13 has a distance that influences the magnetic force on the support plate 2 when the coil spring 11 is stationary, and as shown in FIG. 3 (b). It is installed so that a gap is formed so that the end surface of the magnet 13 is separated from the support plate 2 when 11 is in the minimum contracted state. In addition, although the magnet 13 is spaced apart and arrange | positioned inside the coil spring 11, it is formed in the column shape, The shape etc. are not specifically limited.

Next, the operation of the vibration isolator 1 will be described with reference to FIG. 3, FIG. 4 and FIG.
The vibration isolator 1 is installed on the handle H of the bicycle B via a support arm Sa (see FIG. 1). Then, the screw portion of the photographing camera K is screwed into the support hole of the support plate 2, and the photographing camera K is installed in the vibration isolator 1 (see FIGS. 2 and 3).
As shown in FIG. 4, vibration is generated as the bicycle B travels. However, if the bicycle B is a small vibration that travels on a flat road, the vibration is always expanded and contracted by the coil spring 11. The vibration is prevented by the viscoelasticity of the viscoelastic sheet resin 12 and the magnetic force of the magnet 13 so as to slow the expansion and contraction and the operation of returning to the original state. In addition, when the bicycle B travels through the unevenness, suddenly large vibrations (impacts) may occur. The vibration isolator 1 acts to absorb the large vibration of the bicycle B quickly.

  For example, in order to simplify the description, it is assumed that one vibration is generated from a state in which the vibration isolator 1 is not vibrated. As shown in FIG. 4A and FIG. 4B, in the vibration isolator 1, the coil spring 11 contracts once from the stationary state with respect to the vibration of the viscoelastic sheet resin 12, and thereafter FIG. As shown in (3), it operates to return to a stationary state slowly. In the vibration isolator 1, the coil spring 11 contracts and the bent portion 12b protrudes from between the spring strands in a state where the joint portion 12a (see FIG. 3) of the viscoelastic sheet resin 12 restrains the spring strands. It absorbs vibration by bending and deforming in the direction and exerting viscous resistance. At this time, in the vibration isolator 1, the effect of causing the magnetic force of the magnet 13 to be close to the support plate 2 is strengthened and serves as an aid in absorbing vibration. That is, in the vibration isolating member 1, the coil spring 11 contracts against the viscoelasticity of the viscoelastic sheet resin 12 from the stationary state, and slowly from the contraction by the viscoelasticity of the viscoelastic sheet resin 12 and the magnetic force of the magnet 13. By returning to the stationary state, the vibration from the bicycle B is absorbed and the vibration is not transmitted to the photographing camera K.

As shown by the thin line in FIG. 5, it can be seen that the vibration isolator 1 absorbs vibration much faster than the structure of the vibration proof rubber. In FIG. 5, the same vibration is applied to the configuration of only the vibration-proof rubber, the configuration (DCS) in which the viscoelastic sheet resin 12 is provided on the outer periphery of the coil spring 11, and the configuration of the vibration-proof device 1 of the present invention. The relationship between the amplitude and the elapsed time is shown for the absorption characteristics for the vibration. In order to obtain the results shown in FIG. 5, a camera is installed on a support base via a measurement object (anti-vibration rubber, DCS, anti-vibration device 1), and a gyroscope is installed on the camera. Thus, the support base is vibrated in the vertical direction, and the amount of displacement in the vertical vibration direction (Z-axis) is measured with a gyroscope. In the configuration of the vibration isolator 1, the amplitude is smaller than that of the other configurations, and is almost 0 within 0.5 seconds. It can be seen that vibration (impact) is generated in the structure of the vibration proof rubber with respect to the vibration proof device 1, and the vibration still does not fall within zero even after 2 seconds. Further, in the configuration in which the DCS indicated by the thick line, that is, the coil spring 11 and the viscoelastic sheet resin 12 is combined, vibration is absorbed within 0.5 seconds, but it cannot be prevented that the initial vibration becomes large. I understand that.
Thus, the vibration isolator 1 includes the coil spring 11, the viscoelastic sheet resin 12, and the magnet 13, so that the amplitude with respect to the initial impact (vibration) is smaller and absorbs the impact. You can see that the speed is also very fast.

  As described above, the vibration isolator 1 is provided with the viscoelastic sheet resin 12 that is a viscoelastic member on the coil spring 11 that is an elastic member, and the magnet 13 is installed at a position inside the coil spring 11. A state in which the first vibration constantly generated with the movement of the bicycle B as a moving body and the second vibration suddenly generated due to the unevenness of the road surface are efficiently absorbed and the image of the photographing camera K is easy to see. You can be able to shoot with. In addition, although the vibration isolator 1 was demonstrated as a structure which uses only one magnet 13 in the above-mentioned structure, it is good also as a structure arrange | positioned at each of the support plate 2 and the attachment plate 3. FIG. Another embodiment of the present invention will be described with reference to FIGS. In addition, the already demonstrated member attaches | subjects the same code | symbol and abbreviate | omits or abbreviate | omits description.

  As shown in FIG. 6A, the vibration isolator 1 </ b> B connects the support plate 2 and the mounting plate 3 via a coil spring 11, and supports the support plate 2 along the inner peripheral edge of the coil spring 11. A viscoelastic sheet resin 12 is provided over the mounting plate 3. And the vibration isolator 1B installs the 1st magnet 13 in the attachment board 3 in the position which becomes an inner side of the coil spring 11 and the viscoelastic sheet resin 12, and supports the support plate 2 so that the 1st magnet 13b may be faced. A second magnet 14b is installed. The first magnet 13b and the second magnet 14b are formed to have different magnetic poles.

The vibration isolator 1 </ b> B generates viscoelasticity of the viscoelastic sheet resin 12 and the first magnet 13 and the second magnet 14 when the coil spring 11 expands and contracts when vibration is generated as the bicycle B (see FIG. 1) moves. By suppressing the operation of the coil spring 11 and absorbing the vibration, the magnetic force works so that the first magnet 13b and the second magnet 14b are close to each other, thereby further reducing the vibration. It becomes possible.
In the vibration isolator 1B, the first magnet 13b and the second magnet 14b are formed on the mounting plate 3 and the support plate 2 so that the magnetic poles are different from each other. In combination with the viscoelastic sheet resin 12, it acts so as to always return slowly (not to increase) with respect to the expansion and contraction of the coil spring 11 to absorb vibration.

  Next, the vibration isolators 1C to 1E will be described with reference to FIGS. Anti-vibration devices 1C to 1E described below include cylindrical first magnets 13c to 13e and rod-shaped or cylindrical second magnets 14c to 14e provided so as to face the inner peripheral surface of the cylindrical magnet. Has a combination. And in the vibration isolator 1C-1E, the magnetic pole in the position where the 1st magnets 13c-13e and the 2nd magnets 14c-14e face is different by each structure. Hereinafter, the vibration isolator 1C-1E is demonstrated in order, and the structure once demonstrated about the same positional relationship, installation height, etc. is abbreviate | omitted or simplified.

  As shown in FIG. 6B, the vibration isolator 1C is provided with a first magnet 13c and a second magnet 14c that are opposed to each other inside the coil spring 11 and the viscoelastic sheet resin 12 on the mounting plate 3 and the support plate 2, respectively. doing. And the 1st magnet 13c is formed in the cylinder shape, is a thing of the structure by which an N pole is formed in the surrounding surface, and an S pole is formed in the end surface. The second magnet 14c is formed as a cylindrical or rod-shaped magnet having a diameter that can be moved up and down with a gap in the cylinder of the first magnet 13c. And the 2nd magnet 14c is formed so that the position which faces the internal peripheral surface of the 1st magnet 13c may become a pole different from the magnetic pole of the 1st magnet 13c. Further, the vibration isolator 1C is formed in such a size that the end portions of the first magnet 13c and the second magnet 14c do not come into contact with the support plate 2 or the mounting plate 3 when the coil spring 11 is contracted to be minimized. Has been.

  When the vibration isolator 1C receives vibration from the bicycle B (see FIG. 1) that is a moving body in a state where the outer peripheral surface of the second magnet 14c faces the cylindrical inner surface of the first magnet 13c, the coil spring 11 expands and contracts. I try to absorb the vibration. The vibration isolator 1C absorbs vibration by suppressing the expansion and contraction of the coil spring 11 so as not to increase by the viscoelasticity of the viscoelastic sheet resin 12 and the magnetic force of the first magnet 13c and the second magnet 14c. doing. In addition, in the vibration isolator 1C, in the stationary state, the support plate 2 and the mounting plate 3 are in the stationary state due to the magnetic force that attracts each other at the portion where the first magnet 13c and the second magnet 14c face each other. Since the position is maintained, a more stable state against vibration can be secured.

  Next, as illustrated in FIG. 6C, the vibration isolator 1 </ b> D is configured such that the first magnet 13 d and the second magnet 14 d that are opposed to each other inside the coil spring 11 and the viscoelastic sheet resin 12 are attached to the mounting plate 3 and the support plate 2. Is installed in each. And the 1st magnet 13d is formed in the cylinder shape, is a thing of the structure by which an N pole is formed in the surrounding surface, and an S pole is formed in the end surface. The second magnet 14d is formed as a cylindrical or rod-shaped magnet having a diameter that can be moved up and down with a gap in the cylinder of the first magnet 13d. The second magnet 14d is formed so that the position facing the inner peripheral surface of the first magnet 13c is the same pole as the magnetic pole of the first magnet 13d. Further, the vibration isolator 1C is formed in such a size that the end portions of the first magnet 13d and the second magnet 14d do not come into contact with the support plate 2 or the mounting plate 3 when the coil spring 11 is contracted to be minimized. Has been.

  The vibration isolator 1D has the viscoelasticity of the viscoelastic sheet resin 12 and the first magnet so as to reduce the expansion and contraction of the coil spring 11 and the expansion and contraction operation against vibration from the bicycle B (see FIG. 1). The magnetic force between 13d and the second magnet 14d acts. Particularly in the vibration isolator 1D, since the portion where the first magnet 13d and the second magnet 14d face each other is the same magnetic pole, the position of the support plate 2 is always set to a predetermined position by the repulsive magnetic force. By trying to stop, it becomes the structure which contributes by absorption of a vibration.

  Next, as shown in FIG. 6 (d), the vibration isolator 1 E includes the first magnet 13 e and the second magnet 14 e that are opposed to each other inside the coil spring 11 and the viscoelastic sheet resin 12, and the attachment plate 3 and the support plate 2. Is installed in each. And the 1st magnet 13e is formed in the cylinder shape, and is formed so that it may be located in the order of the south pole and the north pole from the bottom in the height direction of the peripheral surface. The first magnet 13e may be composed of two magnets. The second magnet 14e is a bar magnet or a cylindrical magnet formed so as to be positioned in order of the N pole and the S pole from the support plate 2.

  The vibration isolator 1E has viscoelasticity of the viscoelastic sheet resin 12 so as to reduce the expansion and contraction of the coil spring 11 and the return operation from the expansion and contraction with respect to vibration from the bicycle B (see FIG. 1). The magnetic force of the first magnet 13d and the second magnet 14d acts. In the vibration isolator 1E, in particular, since the portion where the first magnet 13d and the second magnet 14d face each other is arranged in the order of the S pole N pole from the bottom, the illustrated positional relationship (the first magnet 13e and the first magnet 13e The second magnet 14e) tries to stay at the position of the magnetic force in the attracting direction, and when it exceeds that, it acts so as to be returned by the repulsive magnetic force so as to always keep the position of the support plate 2 at a predetermined position. By doing so, it becomes the structure which contributes by absorption of a vibration.

  In addition, the viscoelastic sheet resin 12 of the vibration isolator 1, 1B-1E may be configured as shown in FIG. That is, as shown in FIG. 7, the viscoelastic sheet resin 12 is continuous from the support plate 2 to the mounting plate 3 in the height direction of the coil spring 11, and a plurality of belt-like sheets 22a are formed so as to have a predetermined interval in the circumferential direction. It is good also as providing. In addition, the viscoelastic sheet resin 12 can respond | correspond by adjusting the space | interval with the elastic force of the coil spring 11 by setting it as the strip | belt-shaped sheet | seat 22a. The viscoelastic sheet resin 12 may be configured to be installed on the outer peripheral side of the coil spring 11 when the belt-like sheet 22a is continuously provided from the support plate 2 to the mounting plate 3 with a predetermined interval.

Further, when the vibration isolator 1, 1B to 1E is configured so as to cover the whole from the outer peripheral side of the coil spring 11, a rectangular window hole (not illustrated) is provided in a predetermined range between the spring strands of the coil spring 11. And rectangular window holes (not shown) may be arranged at regular intervals in the circumferential direction, and may also be intermittently formed at regular intervals in the height direction.
Further, when the viscoelastic sheet resin 12 is provided as a belt-like sheet 22 a with an interval in the circumferential direction, the viscoelastic sheet resin 12 may be provided on the outer peripheral side of the coil spring 11.

  And in the vibration isolator 1, 1B-1E, when using a magnet facing or facing, when making a magnetic pole different, a magnetic force works in the direction to which the coil spring 11 contracts, and the magnetic pole is the same. In the case of a pole, a magnetic force acts in the extending direction of the coil spring 11. Therefore, in the vibration isolator 1, 1B to 1E, when two magnets are used facing each other or facing each other, the support plate 2 is always urged in one of the attracting direction and the separating direction, and By acting as an auxiliary force for either expansion or contraction of the coil spring 11, it acts to absorb vibrations.

  As described above, the vibration isolator 1, 1B to 1E exhibits an excellent anti-vibration effect particularly when used for a moving body having a configuration in which a damper such as a bicycle, a baby carriage, or a wheelchair is not installed. Of course, it is possible to exert excellent effects also in a mobile body including a bicycle, a baby carriage, a wheelchair, a motorcycle, a vehicle such as an automobile, an airplane such as a helicopter, and a ship such as a motor boat.

DESCRIPTION OF SYMBOLS 1 Anti-vibration device 1B Anti-vibration device 1C Anti-vibration device 1D Anti-vibration device 1E Anti-vibration device 2 Support plate 3 Mounting plate 3a Mounting screw hole 10 Anti-vibration mechanism 11 Coil spring (elastic member)
12 Viscoelastic sheet resin (Viscoelastic sheet resin)
13 Magnet (first magnet)
13b 1st magnet 13c 1st magnet 13d 1st magnet 13e 1st magnet 14 2nd magnet 14b 2nd magnet 14c 2nd magnet 14d 2nd magnet 14e 2nd magnet B Bicycle H Handle K Shooting camera Sa Support arm

Claims (7)

In an anti-vibration device that is provided to fix a photographing camera to a moving body, and that vibrates with the movement of the moving body,
A support unit that supports the photographing camera; an attachment unit that is disposed so as to face the support unit and is attached to the moving body; and a vibration isolation mechanism that is provided between the support unit and the attachment unit. ,
The vibration isolating mechanism includes an elastic member provided across the support portion and the attachment portion, a viscoelastic member provided on the elastic member so as to absorb an urging force of the elastic member in the expansion / contraction direction, and the support portion And a magnet that is provided on at least one of the attachment portions and applies a magnetic force so as to suppress the vertical movement of the support portion. The support part and the attachment part are formed of a metal plate,
The elastic member is formed of a coil spring,
The viscoelastic member is a viscoelastic sheet resin provided on the periphery of the coil spring,
The vibration isolator according to claim 1, wherein the magnet is installed on at least one of the metal plates, and the installation location is inside the coil spring. The magnet includes a first magnet that is installed on the metal plate that is the attachment portion, and a second magnet that is installed on the metal plate that is the support portion so as to face the first magnet.
The first magnet and the second magnet are formed such that the surfaces facing each other have different magnetic poles, and are spaced apart so that the magnets do not contact each other in the minimum contraction state of the coil spring. The vibration isolator according to claim 2, wherein the vibration isolator is installed. The magnet includes a first magnet that is installed on the metal plate that is the attachment portion, and a second magnet that is installed on the metal plate that is the support portion so as to face the first magnet.
One of the first magnet and the second magnet is formed in a cylindrical shape, and the other is formed in a cylindrical shape or a rod shape having a diameter that can be inserted inside the first magnet.
The second magnet is installed inside the first magnet so that the second magnet enters and separates,
The magnetic pole on the peripheral surface of the first magnet and the magnetic pole on the peripheral surface of the second magnet facing the peripheral surface of the first magnet are formed to be the same magnetic pole. The vibration isolator described in 1. The magnet includes a first magnet that is installed on the metal plate that is the attachment portion, and a second magnet that is installed on the metal plate that is the support portion so as to face the first magnet.
One of the first magnet and the second magnet is formed in a cylindrical shape, and the other is formed in a cylindrical shape or a rod shape having a diameter that can be inserted inside the first magnet.
The second magnet is installed inside the first magnet so that the second magnet enters and separates,
The magnetic pole on the peripheral surface of the first magnet and the magnetic pole on the peripheral surface of the second magnet facing the peripheral surface of the first magnet are different magnetic poles. The vibration isolator described in 1. The magnet includes a first magnet that is installed on the metal plate that is the attachment portion, and a second magnet that is installed on the metal plate that is the support portion so as to face the first magnet.
One of the first magnet and the second magnet is formed in a cylindrical shape, and the other is formed in a cylindrical shape or a rod shape having a diameter that can be inserted inside the first magnet.
The second magnet is installed inside the first magnet so that the second magnet enters and separates,
The magnetic poles on the circumferential surface of the first magnet are formed in the S direction and N poles or N poles and S poles in the height direction, and the magnetic poles on the circumferential surface of the second magnet are N poles and S poles or S in the height direction. The anti-vibration device according to claim 2, wherein the anti-vibration device is formed so as to be a pole and an N pole.   The viscoelastic sheet resin is arranged in the height direction of the coil spring across the strands of the coil spring and is installed at a predetermined interval in the circumferential direction. Item 3. The vibration isolator according to item 2.

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