JP5024691B2 - Speaker support structure - Google Patents

Description

The present invention relates to a speaker support structure for supporting a speaker.
When the speaker outputs sound, the baffle plate holding the speaker, the speaker box incorporating the speaker, etc. vibrate accordingly.

As a result, the vibration generated in the baffle plate, the speaker box, etc. impairs the original sound output from the speaker.
It can be said that it is more serious for the audio fan that the original sound from the speaker is damaged.

In addition, even when an impact is applied to the baffle plate and speaker box, the original sound from the speaker is adversely affected until the impact is shaken and attenuated. This invention reduces vibrations generated by the baffle plate and speaker box. In particular, the present invention relates to a compact structure and improved durability.

When the speaker outputs sound, the baffle plate holding the speaker, the speaker box incorporating the speaker, and the like vibrate.
The original sound output from the speaker is damaged by the vibration of the baffle plate, the speaker box, etc., but the invention disclosed in the following published patent publication is known as an invention for reducing the damage of the original sound. ing.

  Japanese Patent No. 4406698

The speaker vibrates the air and transmits the sound to the listener as a result, but the baffle plate that holds the speaker and the speaker box with the built-in speaker are both directly and indirectly susceptible to vibration when the speaker is output. It has become.
If the baffle plate and the speaker box vibrate during speaker output, this vibration will be transmitted to the support base that supports the speaker box, and as a result, these vibrations will change the original sound from the speaker. As a result, the original sound may be damaged.

Therefore, in order to reduce the vibration of the speaker box, a spike having a conical shape at the lower end is interposed between the speaker box and the support base, and the weight of the speaker box is concentrated on the tip of the spike, thereby vibrating the speaker box. The structure which makes it difficult to convey to a support stand is widely used.
An invention disclosed in Japanese Patent No. 4406698 (hereinafter referred to as “pre-registered invention”) is known as a configuration that makes it difficult to transmit the vibration of the speaker box to the support base using the spike having such a configuration.

  In the pre-registered invention, first and second spike portions are provided on the front and rear surfaces of a speaker box (speaker enclosure) incorporating a speaker, respectively, and an external attachment provided with a spike receiver corresponding to the spike portions. The speaker box is surrounded by vibration transmitting means, and further, a third spike portion is provided at the bottom of the speaker box, and is supported from below by a spike receiver corresponding to the third spike portion. The spike receivers corresponding to the first, second and third spike portions are directly or indirectly connected to the vibration absorbing board.

In the pre-registered invention of such a configuration, when the speaker outputs sound, the baffle plate or the speaker box itself vibrates accordingly, and the vibration from the baffle plate or the speaker box is intensively transmitted from the spike portion to the spike receiver, Furthermore, the vibration absorption board absorbs this vibration, though it is transmitted directly or indirectly to the vibration absorption board.
Therefore, in such a configuration of the pre-registered invention, if the baffle plate or the speaker box vibrates when the speaker outputs sound, this vibration emitted from the baffle plate or the speaker box is intensively transmitted to the spike receiver at the tip of the spike portion. However, it can be accepted that this vibration is finally absorbed by the vibration absorbing board, and as a result, the original output sound from the speaker can be reduced from being damaged by other vibrations.

However, the pre-registered invention with such a configuration has a problem that the number of parts is large and the manufacturing is complicated accordingly, and the apparatus itself is large. In particular, the entire apparatus including the speaker box is very bulky.
In other words, in the pre-registered invention having such a configuration, since the number of constituent members is large, high accuracy is required for the production dimensions of each member, and accuracy is required for alignment of each member, etc. There is a problem that it is complicated.

In addition, in the case where the device having such a configuration is not intentionally manufactured from the beginning, that is, a spike portion is attached to a desired speaker box which has already been completed, and the spike portion is associated with the position of the attached spike portion. If the receiver is disposed, and the external vibration transmitting member and the vibration absorbing board are both made in a size corresponding to the speaker box and further disposed at a predetermined position, the manufacturing becomes more complicated. The problem becomes even more serious.
Similarly, even if a spike portion is attached from the beginning to a desired speaker box that has already been completed, a spike receiver is provided corresponding to the position of the spike portion, and an external vibration transmission member and Since both the vibration absorbing boards are made in a size corresponding to the speaker box and disposed at a predetermined position, the manufacturing work is similarly more complicated.

On the other hand, when the speaker box itself is small, such as a so-called mini component in which speakers, tuners, players, etc. are compactly set, the device for suppressing the vibration of the speaker box is bulky and large. There arises a problem that it is difficult to secure a space and the appearance is impaired in a side-by-side state with a tuner or a player.
Therefore, even if the inventor of the present invention is a desired speaker box that has already been completed and is provided with a spike portion, or a desired speaker box that has already been completed and can be provided with a spike portion later, We examined the structure to support the speaker box for the purpose of suppressing the influence of the vibration from the speaker box on the sound from the speaker.

As a result of the examination, it has been found that when the external vibration transmitting member is removed in the pre-registered invention, the trouble of manufacturing the device is eliminated, and it becomes possible to adapt to the desired speaker box.
However, even in the configuration in which the external vibration transmission member is removed in the pre-registered invention, the problem that the entire apparatus is bulky and large is left unresolved.

Therefore, in order to solve such a problem, a speaker support structure in which the vibration absorbing board is suppressed in a compact manner in the previously registered invention is conceivable.
However, in such a configuration, the smaller the vibration absorbing board is made, the less the vibration is absorbed from the speaker box, and the smaller the vibration absorbing board is, the more the dynamic stress becomes flex fatigue. The problem of weakening arises.

  The present invention has been made in view of the above circumstances, and can be applied even when a speaker is incorporated in a desired ready-made speaker box, and can be manufactured and aligned with the speaker box. Is simple, and the structure of the device itself is simple. Furthermore, the overall size of the device including the speaker box is kept compact, is not bulky, and can be used for vibration resistance of the speaker box. A speaker support structure having a wide range of characteristics is provided.

The inventor conducted intensive research and experiment to keep the above-mentioned problems, in particular, the means for reducing vibration and impact on the speaker box side transmitted from the spiked body compact and to ensure the durability. It came to completion.
In the present invention, a spike body is disposed on the speaker side, and a spike receiver is disposed at a position opposite to the spike body. Further, the spike body is provided to the spike body from the speaker side. A structure has been devised in which transmitted vibrations and shocks are absorbed by a plurality of buffer plates made of silicon rubber arranged in a stacked state in a casing, and a rigid plate is interposed between the plurality of buffer plates. And completed.

The detailed configuration is such that one end portion is pointed toward the tip and has a substantially conical shape, and a spike body that supports the speaker side at the opposite end portion, and the spike body is formed into the conical shape. It is composed of a spike receptacle supported at the tip,
The spike receiver has a petri dish shape, and is formed into a plate shape from a first casing having a large diameter and a second casing having a small diameter, and silicon rubber, and the first casing and the second casing are fitted to each other. A plurality of buffer plates disposed in the second casing in a state of being stacked in a direction to be joined, and a rigid plate material interposed between the buffer plates adjacent to each other of the plurality of buffer plates,
Further, the height dimension when the plurality of buffer plates and the plate material are stacked is configured to be larger than the height of the internal space defined when the first casing and the second casing are fitted. This is a support structure for a speaker.

Here, the silicon rubber is a rubber-like synthetic resin mainly composed of silicone, and has a time lag and a slow resistance against being given a pressing force from the outside. It is generated, that is, has the property that non-Newtonian dynamics act.
Therefore, when vibration or shock is generated from the speaker box side, the vibration or shock reaches the shock absorber disposed at the uppermost position through the casing located on the upper side from the tip of the spike body. The buffer plate disposed at the uppermost position is deformed in response to the vibration or impact described above, and slowly generates a drag force after a predetermined time delay.

However, since most of the vibration and buffer applied to the buffer plate are absorbed by deformation of the buffer plate, the drag generated at the buffer plate at this time is almost negligible compared to the applied vibration and shock. small.
This drag is also transmitted to the rigid plate material in contact with the buffer plate. Further, the drag force to this plate material is transmitted to the buffer plate located second from the top, but the same is applied to the buffer plate located second from the top. The shape is deformed to absorb the drag, and the drag is generated with a time delay.

Here, the buffer plate located second from the top is deformed and absorbs the drag, which is smaller than the initial vibration and shock from the speaker side, so that it is located second from the top. Below the buffer plate, the initial vibration and impact from the speaker side and the drag of the buffer plate located at the top are negligibly small.
On the other hand, since the deformation range of the buffer plate is regulated by the two casings, the stress is suppressed within a certain range, the deterioration is suppressed, and a large material fatigue does not occur.

In the best mode for carrying out the present invention, it is a configuration explanatory diagram illustrating a configuration of a main part, including a partial cross section. FIG. 2 is an exploded perspective view illustrating the entire configuration of the main part in the best mode of embodiment shown in FIG. 1. In the best mode of embodiment shown in FIG. 1, it is a perspective view for explaining the overall appearance of the use state.

The present invention will be described below in the best mode for carrying out the invention based on the drawings. However, the present invention is not limited to this embodiment.
As shown in FIGS. 1 to 3, the speaker support structure 1 includes three sets of spike bodies 2 and spike receivers 3.

The spike body 2 is rod-shaped and has a tip portion 4 having a substantially conical shape with one end pointed toward the tip, and a speaker 5 side fixed to the speaker 5 at the opposite end. The support part 6 which supports is provided.
The support 6 is threaded to a female screw (not shown) formed on the bottom surface of the speaker box 7 that holds the speaker 5 and is integrated with the speaker box 7.

On the bottom surface of the speaker box 7, the three female screw portions are provided. The three female screw portions are formed in a substantially equilateral triangle.
The spike body 2 is made of a rigid metal such as stainless steel.

The spike receiver 3 is for placing and supporting the spike body 2 at the tip of the tip portion 4.
The spike receiver 3 includes an upper casing 8, a lower casing 9, buffer plates 10 and 11, and a plate material 12.

The upper casing 8 and the lower casing 9 have a petri dish shape, and the upper casing 8 is located above and the lower casing 9 is located below.
Further, the inner diameter of the annular portion of the upper casing 8 is formed larger than the outer shape of the annular portion of the lower casing 9, and is configured to be fitted and integrated.

The top surface of the upper casing 8 has a mortar shape and is formed with a recess 13 that supports the tip portion 4 of the spike body 2 in a contact state.
The upper casing 8 and the lower casing 9 are made of a rigid metal, such as stainless steel.

Both the buffer plates 10 and 11 are formed in a substantially disc shape from silicon rubber so as to have a diameter slightly smaller than the inner diameter of the annular portion of the lower casing 9.
Here, the silicone rubber forming the buffer plates 10 and 11 is a rubber-like synthetic resin mainly composed of silicone, and when a pressing force is applied from the outside, the drag is delayed in time (time lag). It is generated slowly and has a property that non-Newtonian dynamics act.

The plate material 12 is a rigid body, and is formed of, for example, metal, plastic, or the like.
The configuration of the speaker support structure 1 is as described above, and the setting and function of the speaker support structure 1 will be described below.

Three spike bodies 2 are screwed into the female thread portion formed on the bottom surface of the speaker box 7 that holds the speaker 5, and the spike bodies 2 are integrated with the bottom surface of the speaker box 7.
On the other hand, the lower casing 9 is stacked and accommodated in the order of the buffer plate 11, the plate material 12, and the buffer plate 10, and the upper casing 8 is fitted into the lower casing 9.

The buffer plate 11 is formed with a tapered portion (not shown), and the buffer plate 11 is accommodated in the lower casing 9 so that the tapered portion is located at the bottom of the lower casing 9.
With this tapered portion, the buffer plate 11 can be easily attached to and detached from the lower casing 9.

Here, the spike receiver 3 is positioned with respect to the speaker box 7 so that the tip 4 of the spike body 2 is positioned in the recess 13 of the spike receiver 3.
Next, an output line (not shown) from the acoustic amplifier is connected to the speaker 5 to complete the setting.

Here, when the user outputs the acoustic amplifier, a sound output signal is input to the speaker 5 and the speaker 5 emits sound.
The sound output of the speaker 5 is vibration, and the vibration is transmitted to the upper casing 8 of the spike receiver 3 through the spike body 2 supporting the speaker box 7.

Since the upper casing 8 of the spike receptacle 3 is supported only by the buffer plate 10, the vibration transmitted to the upper casing 8 is applied only to the buffer plate 10.
Here, when the buffer plate 10 receives vibration from the upper casing 8, it absorbs a part of the vibration and generates a drag slowly with a time delay, but the drag is compared with the applied vibration. The value is greatly scaled down.

Therefore, even if vibration is applied to the buffer plate 10, there is a time delay and the drag is small, so that resonance hardly occurs.
In addition, the drag generated here is transmitted to the upper casing 8 in part, but this drag is greatly scaled down compared to the vibration applied from the speaker box 7.

Therefore, even if the drag force from the buffer plate 10 advances from the upper casing 8 to the spike body 2 and the speaker box 7, it is possible to say that the sound from the speaker 5 is completely affected by causing a large vibration. hard.
On the other hand, the buffer plate 10 tries to give a drag force to the plate material 12, but since the plate material 12 is a rigid body, the drag force is transmitted to the buffer plate 11.

Further, since this drag is opposite in direction to the drag acting on the upper casing 8 and has the same magnitude and time of occurrence, it has a time lag and acts slowly. Resonance is unlikely to occur at all.
Accordingly, it is extremely unlikely that the sound output from the speaker 5 will be affected by a drag acting on the plate 12 from the buffer plate 11.

On the other hand, when a large impact is applied to the spike receiver 3 via the spike body 2 as a result of some object colliding with the speaker box 7, if a large impact is applied to the upper casing 8, The large impact is given to the buffer plate 10.
Here, the buffer plate 10 is greatly deformed with a time delay corresponding to the magnitude of the impact, but when the impact is greater than a certain level, a large impact is transmitted via the plate material 12 and the impact plate 11. Cause deformation.

However, since the buffer plates 10 and 11 are stored in the casings 8 and 9, the buffer plates 10 and 11 are not greatly deformed from the shape of the storage space formed by the casings 8 and 9.
Further, as described above, a large impact is also absorbed in the range of deformation of the buffer plate 8, and resonance or the like does not occur and the sound from the speaker 5 is not impaired for a long time.

Therefore, since both the shock absorbing plates 10 and 11 are regulated so as to be deformed within a certain range when subjected to vibration or impact, there is no possibility that large deformation continuously occurs and as a result, material fatigue occurs. .
In addition, since both the shock absorbing materials 10 and 11 have the property of absorbing the shock even if it receives a large impact, it is extremely unlikely that the vibration will be in a resonance state and the vibration will continue for a long time. In addition, the sound output from the speaker 5 is not adversely affected.

Here, a simple experiment was performed on the speaker support structure 1 of the present invention, and the results will be described.
A speaker box 7 holding the speaker 5 was prepared, and spike bodies 2 made of stainless steel were attached to the bottom surface of the speaker box 7 by screwing so as to form a substantially equilateral triangle. Next, a spike receiver made of stainless steel was prepared, and the spike receiver was arranged corresponding to the position of the three spike bodies, and this was used as a control group.

On the other hand, a speaker box 7 having the above-described configuration is prepared, and a buffer plate 10 made of a silicon rubber sheet having a diameter of 50 mm and a thickness of 8 mm, a metal plate plate 12 having a thickness of 0.5 mm, and a thickness 2 A spike receiver 3 provided with a shock absorbing plate 11 made of a millimeter silicon rubber sheet was prepared and used as an experimental section.
Next, in the listening room provided with a soundproof wall and a sound absorbing wall, the output end of the acoustic amplifier is connected to the speaker 5 and the same reproduced sound is output from the speaker 5 from the same audio amplifier. Several people listened to and compared the differences.

The person who compared the listening of the output sound here is the inventor of the present invention, who is originally engaged in research and development at an audio maker, and at least listens to the normal reproduced sound. It is difficult to think that the ability to is below average.
As a result of the experiment, there was a clear difference in listening between the output sound of the experimental group and the output sound of the control group, and the output sound of the experimental group was simpler and clearer than the output sound of the control group I was able to receive audio. However, depending on the type of playback audio, the experimental group was sometimes too simple compared to the control group, and it seemed somewhat unsatisfactory.

The thickness and composition of the silicon rubber of the buffer plates 10 and 11 are appropriately selected according to the weight of the entire speaker box 7 including the weight of the speaker 5 and the spike 2 and the size of the output from the speaker 5. desirable.
Further, in the case where the silicon rubber forming the buffer plates 10 and 11 is required to be lightweight and have high buffering properties, in addition to the selection of silicon rubber, a method of foaming and molding silicon rubber can be used.

In the speaker support structure 1, the speaker box 7 is supported by the three spikes 2, but may be supported by using four or more spikes 2.
The speaker support structure 1 has been described as supporting the speaker box 7 vertically below. However, depending on the position and orientation of the speaker 5, the spike 2 and the spike receiver 3 are appropriately disposed in the direction in which vibration and impact are desired to be suppressed. It is desirable to select the position and orientation.

The sharp shape of the tip 4 of the spike body 2 and the shape and size of the concave portion 13 of the upper cahang 8 are preferably set as appropriate based on the material, ease of processing, appearance, versatility, and the like.
In the speaker support structure 1, the spike receiver 3 includes two buffer plates 10, 11 and one plate material. However, according to the selection and processing of the material and the characteristics of the sound from the speaker 5. The buffer plate may be composed of three or more sheets.

1: Speaker support structure 2: Spike body 3: Spike receptacle 5: Speaker 7: Speaker box 8: Upper casing (first casing)
9: Lower casing (second casing)
10, 11: Buffer plate 12: Plate material

Claims (1)

One end is pointed toward the tip and has a substantially conical shape, and a spike body that supports the speaker side at the opposite end, and a spike that supports the spike body at the tip of the cone It consists of a receiver and
The spike receiver has a petri dish shape, and is formed into a plate shape from a first casing having a large diameter and a second casing having a small diameter, and silicon rubber, and the first casing and the second casing are fitted to each other. A plurality of buffer plates disposed in the second casing in a state of being stacked in a direction to be joined, and a rigid plate material interposed between the buffer plates adjacent to each other of the plurality of buffer plates,
Further, the height dimension when the plurality of buffer plates and the plate material are stacked is configured to be larger than the height of the internal space defined when the first casing and the second casing are fitted. A speaker support structure characterized by that.

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