JPH0523694U - Vibration prevention structure for recording microphone - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a vibration preventing structure for a recording microphone that can sufficiently absorb the vibration of the recording microphone without increasing the number of parts. [Structure] A first fitting portion 38 and a second fitting portion 40 are formed on the mounting base 26, and the first fitting portion 3 is formed.
A microphone housing case 14 in which the recording microphone 11 is housed is fitted into the housing 8. In addition, a silicone oil housing case 20 that houses silicone oil that absorbs vibrations of the recording microphone 11 is fitted into the second fitting portion 40. The contact surface 20A of the silicone oil storage case 20 is in contact with the first base portion 18 of the microphone storage case 14. When the vibration is transmitted to the mounting base 26, the vibration is absorbed by the silicone oil, and thus the vibration can be prevented from being transmitted to the recording microphone 11. Further, the noise filter circuit is not necessary, and the number of parts does not increase.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration prevention structure for a recording microphone that absorbs vibrations of the recording microphone.

[0002]

[Prior Art]

 For a recording microphone, for example, a recording microphone provided for 8 mm video, it is necessary to prevent vibration from the zoom lens driving motor from being transmitted to the recording microphone so that good recording without vibration noise is possible. There is a request to do so.

A conventional example of a vibration preventing structure for a recording microphone will be described below with reference to FIG. The recording microphone is housed in a box-shaped microphone housing container 50, and a cord 52 of the recording microphone is pulled out of the microphone housing container 50. The cord 52 is inserted into a through hole 56 of a bracket 54 that is integrated with the 8 mm video body, and the cord 52 enables the microphone housing container 50 to be held in a state of being separated from the bracket 52. There is. This prevents vibration of the zoom lens driving motor (not shown) from being transmitted to the recording microphone via the bracket 52.

[0004]

[Problems to be solved by the device]

 However, in the vibration preventing structure of the recording microphone, the vibration is transmitted through the cord 52, so that the vibration of the zoom lens driving motor cannot be sufficiently absorbed. Therefore, in addition to the above vibration prevention structure, it is necessary to provide a noise filter circuit that cuts vibration noise in a predetermined region generated by the zoom lens driving motor. Therefore, there is a problem that the number of parts of the vibration prevention structure for the recording microphone increases.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a vibration preventing structure for a recording microphone, which is capable of sufficiently absorbing the vibration of the recording microphone without increasing the number of parts.

[0006]

[Means for Solving the Problems]

 A vibration preventing structure for a recording microphone according to the invention of claim 1 comprises: a bracket having a mounting hole and a fitting hole communicating with the mounting hole; and a base portion closely contacted with an opening peripheral portion of the mounting hole. A microphone accommodating member that accommodates the recording microphone and that is inserted into the attachment hole, is elastically deformable, and is inserted into the insertion hole, and the attachment that is inserted into the insertion hole. An opening of the hole; and a resiliently deformable vibration absorbing member that presses the base portion to a peripheral portion to fix the microphone housing member to the bracket and absorbs vibration transmitted to the microphone housing member. There is.

According to a second aspect of the present invention, there is provided a vibration preventing structure for a recording microphone in which a mounting hole and a fitting hole communicating with the mounting hole are formed in a bracket and an opening peripheral portion of the mounting hole. And a microphone accommodating portion for accommodating a recording microphone in an opening formed in a portion projecting from the mounting hole and protruding from the mounting hole, which is elastically deformable and can be fitted from the fitting hole. And the microphone housing member that is fitted into the fitting hole and presses the base portion against the opening peripheral portion of the mounting hole to fix the microphone housing member to the bracket and absorb the vibration transmitted to the microphone housing member. And an elastically deformable vibration absorbing member.

[0008]

[Action]

 According to the first aspect of the present invention, the microphone housing member fitted through the fitting hole is elastically deformable, and the base is pressed against the opening peripheral portion of the mounting hole by the vibration absorbing member fitted through the fitting hole. It is attached to the bracket.

According to the first aspect of the present invention, since the above configuration is adopted, it is possible to prevent the vibration of the recording microphone without increasing the number of parts. Furthermore, as described above, the recording microphone can be fixed to the bracket by a simple operation of fitting the vibration absorbing member into the fitting hole.

According to the second aspect of the invention, an opening is formed in the microphone housing portion, and the opening portion projects from the mounting hole. Therefore, since the recording microphone can be inserted and fixed in the opening after the microphone receiving member is inserted into the insertion hole, it is possible to prevent the recording microphone from being damaged when the microphone housing member is inserted into the insertion hole.

[0011]

【Example】

 FIG. 3 is a perspective view of an 8 mm video to which a vibration preventing structure for a recording microphone according to an embodiment of the present invention is applied.

As shown in FIG. 3, the 8 mm video 10 is provided with a recording section 12 having the recording microphone 11 shown in FIG. The recording section 12 is covered with a mesh case 15. Further, the 8 mm video 10 is provided with a motor (not shown) for driving the zoom lens 13.

As shown in FIG. 1, a microphone housing case 14 as a microphone housing member arranged in the recording section 12 is made of an elastic material such as rubber and has a substantially half size in which the recording microphone 11 is housed. It has a cylindrical case body 16. A pair of mounting holes 16A for mounting the recording microphone 11 is formed on the peripheral surface of the case body 16 along the axial direction, and the recording microphone 11 is inserted into each mounting hole 16A. It is fixed in the fixed state.

The microphone housing case 14 also includes a rectangular base portion 18 extending from the side portion 16 B of the case body 16. The cord (not shown) of the recording microphone 11 is pulled out from the microphone housing case 14, and the signal of the recording microphone 11 is taken out through this cord.

The silicone oil containing case 20 as a vibration absorbing material containing member for absorbing the vibration of the recording microphone 11 is made of an elastic material such as rubber like the microphone containing case 14, and has a substantially rectangular column shape. It is provided with a silicone oil storage portion 22 and a base portion 24 extending from the outer circumference of one end of the silicone oil storage portion 22. The silicone oil containing portion 22 contains silicone oil for absorbing vibrations to the recording microphone 11. The size of this silicone oil is determined so that it can sufficiently absorb the vibration generated by the motor.

The mounting base 26, which is a mounting member to which the microphone housing case 14 and the silicone oil housing case 20 are mounted, has a mounting body formed in a substantially prismatic shape, and a longitudinal direction of a side surface 26 A of the mounting body (see FIG. 1 direction of arrow A) A protruding piece 26B is provided upright at the center. The mounting base 26 has a fitting hole 28 formed in the upper end surface 26C in a direction orthogonal to the upper end surface 26C and having a bottom surface 26D (see FIG. 2) as a bottom. The fitting holes 28 are formed in a pair with the projecting pieces 26B separated from each other, and each of the facing surfaces 30 forming the fitting holes 28 is formed from the opening of the fitting hole 28 to the bottom surface as shown in FIG. The prismatic protrusions 32 extending up to 26D are provided so as to face each other.

Due to the pair of protrusions 32, the fitting hole 28 has a first fitting portion 38 into which the microphone housing case 14 is fitted, and a second fitting portion 40 into which the silicone oil housing case 20 is fitted. It is divided into The microphone housing case 14 is attached with the base portion 18 in contact with the wall surface forming the first fitting portion 38, and the recording microphone 11 is arranged outside the attachment base 26.

As shown in FIG. 1, the dimension L1 of the first fitting portion 38 in the longitudinal direction (direction of arrow A in FIG. 1) is substantially the same as the dimension L2 of the base portion 18 in the longitudinal direction. The dimension L3 in the width direction (the direction of arrow B in FIG. 1) of the portion 38 is smaller than the dimension L4 in the width direction of the microphone housing case 14.

The longitudinal dimension of the second fitting portion 40 is the same as the longitudinal dimension L 1 of the first fitting portion 38, and is substantially the same as the longitudinal dimension L 5 of the base portion 24. Furthermore, the widthwise dimension L6 of the second fitting portion 40 is substantially the same as the widthwise dimension L7 of the base portion.

As shown in FIG. 2, the base portion 18 is pressed by the contact surface 20 A of the silicone oil collecting case 20 and slightly deformed toward the case body 16 side. Since the microphone collecting case 14 and the silicone oil collecting case 20 are arranged as described above, the silicone oil has a function of absorbing the vibration of the recording microphone 11.

As shown in FIG. 1, a pair of openings 31 communicating with the first fitting portion 38 are formed on the side surface 26A of the mounting base 26 with the projecting pieces 26B therebetween. The opening 31 is adapted to receive the case body 16 in a substantially tight manner.

The operation of this embodiment will be described below. When the recording microphone 11 is mounted on the mounting base 26, the microphone housing case 14 before the recording microphone 11 is mounted is fitted into the first fitting portion 38. In this case, the dimension L3 of the first fitting portion 38 in the width direction is smaller than the dimension L4 of the microphone receiving case 14 in the width direction, so that the microphone housing case 14 is not separated from the wall surface of the first fitting portion 38 at the time of this fitting. It interferes and elastically deforms so that the wall thickness dimension L4 becomes smaller. In this embodiment, since the microphone receiving case 14 does not house the recording microphone 11 at the time of fitting, the recording microphone 11 is not damaged at the time of fitting.

Further, the microphone housing case 14 inserted in the first fitting portion 38 is moved toward the opening 31 and the case body 16 is attached to the opening 31. As a result, the microphone housing case 14 is fixed to the mounting base 26 with the base 18 abutting the wall surface of the first fitting portion 38 and the case body 16 fitted in the opening 31. ..

Further, the silicone oil storage portion 22 is fitted into the second fitting portion 40. As a result, the base portion 24 is fitted into the second fitting portion 40 while being tightly received in the width direction and the longitudinal direction, and the silicone oil storage case 20 is mounted on the mounting base 26. In this mounted state, the contact surface 20A is in contact with the base portion 18 of the silicone oil storage portion 22, so that the vibration absorbing function of the silicone oil can be exerted. Further, as described above, the recording microphone 11 is inserted and fixed in the opening 31 of the microphone collecting case 14 mounted on the mounting base 26.

In the vibration preventing structure for the recording microphone described above, the recording microphone 11 is supported by the silicone oil, which is a vibration absorbing material, via the silicone oil storage portion 20 and the base portion 18. Therefore, even if the motor drives the zoom lens 13, the vibration of the mounting base 26 due to this driving is fully absorbed by the silicone oil.

In the present embodiment, the vibration preventing structure of the recording microphone 11 can be configured by a simple work of fitting the silicone oil collecting case 20 into the second fitting hole 40. Therefore, the recording microphone 11 is bracketed by the cord. It eliminates the need for the troublesome work of attaching to the, and the noise filter circuit.

[0027]

[Effect of the device]

 With the above structure, the vibration preventing structure of the recording microphone according to the present invention can provide the vibration preventing structure of the recording microphone that can sufficiently absorb the vibration of the recording microphone without increasing the number of parts. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a vibration preventing structure of a recording microphone according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a perspective view of an 8 mm video applied to the vibration prevention structure of the recording microphone of FIG. 1. FIG.

FIG. 4 is a side view showing a vibration prevention structure of a recording microphone.

[Explanation of symbols]

11 Microphone for recording 14 Microphone collecting case (microphone collecting member) 18 Base 20 Silicon oil collecting case 26 Mounting base (bracket) 28 Fitting hole

Claims (2)

[Scope of utility model registration request] 1. A bracket in which a mounting hole and a fitting hole communicating with the mounting hole are formed, a base portion closely attached to an opening peripheral edge portion of the mounting hole, and the mounting microphone for accommodating the recording microphone. A microphone accommodating portion that is inserted into the hole, is elastically deformable, and is fitted into the fitting hole; and presses the base portion into the opening peripheral edge portion of the mounting hole that is fitted into the fitting hole. And a vibration absorbing member that is elastically deformable and that fixes the microphone housing member to the bracket and absorbs the vibration transmitted to the microphone housing member. 2. A bracket in which a mounting hole and a fitting hole communicating with the mounting hole are formed, a base portion which is in close contact with an opening peripheral edge portion of the mounting hole, and which is inserted into the mounting hole and A microphone accommodating member having an microphone formed in an opening formed at a portion projecting from the mounting hole and accommodating a recording microphone; An elastically deformable vibration absorbing member that presses the base portion against the opening peripheral portion of the mounting hole to fix the microphone housing member to the bracket and absorbs the vibration transmitted to the microphone housing member. A vibration-proof structure for recording microphones.