JP2001165239A - Damper unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper unit manufactured at a low cost by reducing the number of part items. SOLUTION: This damper unit is characterized in that a movable part 2 is slidably supported to a case body 1, and resin magnets 5, 7 with like-poles facing to each other are attached to the end face of the movable part 2 in the case body 1 side and the bottom 4 of the case body 1 facing to the end face respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a damper unit used in various industrial fields.
For example, the present invention relates to a damper unit using a resin magnet instead of a coil spring.

[0002]

2. Description of the Related Art Conventionally, for example, various household articles, electric appliances, etc. have been provided with damper units at various locations. This damper unit is generally composed of a movable part using a coil spring and a case body that slidably supports the movable part, and is used for restoring the posture of various components, for cushioning, and for absorbing shock. . By the way, the size of the above-mentioned damper unit itself cannot be neglected as some home electric parts are downsized year by year. In particular, in the case of the above-mentioned damper unit which requires a certain amount of deformation using a coil spring, for example, a certain amount of shrinkage, in order to secure this amount of shrinkage,
Since the entire length in the moving direction of the movable part is required, it is difficult to meet the demand for miniaturization of parts.

[0003]

However, in order to reduce the size of the damper unit in response to the above demands,
First, it is necessary to reduce the size of the coil spring itself. However, such a reduction in the size of the coil spring results in a problem that the cost is greatly increased.

When the size of the damper unit is reduced,
There is a problem that the work of assembling the coil spring is difficult, and the work is troublesome. In particular, when the coil spring is mounted, if the mounting length does not match the natural length, it is necessary to mount the coil spring in a contracted state, which causes a problem that the operation becomes difficult. In view of the above, an object of the present invention is to provide a damper unit that can cope with downsizing at a low cost and can easily perform an attaching operation.

[0005]

According to a first aspect of the present invention, a movable part is slidably supported by a case body, and an end surface of the movable part on the case body side is connected to the case body. Magnets whose pole sides face each other are attached to the wall of the case body facing the end face of the movable part. With such a configuration, a repulsive force or an attractive force generated by the magnet provided on the end surface of the movable portion on the case body side and the magnet provided on the wall portion of the case body facing the end surface of the movable portion is used. Thus, it is possible to provide a function equivalent to that of the coil spring.

[0006] The invention described in claim 2 is characterized in that the magnet is a resin magnet. With this configuration, when the case main body and the movable portion are molded with resin, the magnet can be manufactured by simultaneous molding.

According to a third aspect of the present invention, each of the case body and the movable portion is provided with a groove along a moving direction of the movable portion. With this configuration,
Harnesses and the like used for peripheral components can be routed by effectively utilizing the grooves.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. In the figure, reference numeral 1 denotes a case main body, and the case main body 1 is made of resin and formed in a bottomed cylindrical shape. At the periphery of the opening of the case body 1, a stopper 3 for preventing the movable portion 2 from falling, which will be described later, is formed over the entire circumference toward the inside. In addition, the stopper part 3 may be provided in a part.

A resin magnet 5 is embedded in a bottom 4 of the case body 1 as a wall, which is opposed to an insertion-side end face of the movable portion 2 described later. The resin magnet 5 is formed mainly of resin similarly to the case main body 1, and can be manufactured by simultaneous molding with the case main body 1 in manufacturing. Specifically, the resin magnet 5 is formed in a cylindrical shape, and in this embodiment, the resin magnet 5 is arranged such that the upper surface side is an N pole.

The movable portion 2 is formed in a columnar shape, is formed of resin similarly to the case body 1, and is slidably inserted into the case body 1. On the insertion end side of the movable portion 2 with respect to the case body 1, a stopper portion 6 is provided over the entire circumference toward the outside, and the stopper portion 6 is adapted to be locked to the stopper portion 3 of the case body 1. . Note that the stopper 6 is also the stopper 3
If it can be locked, there is no need to provide it over the entire circumference.

A resin magnet 7 as a magnet is embedded in the end of the movable portion 2 on the side of insertion into the case body 1. The resin magnet 7 is formed in a columnar shape similarly to the resin magnet 5, and in this embodiment, the resin magnet 7 is arranged such that the lower surface side is an N pole. And, like the resin magnet 5 of the case body 1, it is molded mainly of resin, and can be manufactured by simultaneous molding with the movable part 2 in manufacturing.

Accordingly, the resin magnet 5 and the resin magnet 7 are arranged with their N poles having the same polarity facing each other, and the case main body 1 is compressed in the direction of compressing the movable part 2.
When pressed into the case, it functions as a compression spring that returns to separate from the case body 1. In addition, you may make it arrange | position so that an S pole may be opposed. At the end of the movable part 2 opposite to the resin magnet 7, a bolt B for mounting is integrally formed.

According to the above embodiment, the resin magnet 7 provided on the insertion end side of the movable portion 2 into the case body 1,
The resin magnet 5 provided on the bottom 4 of the case body 1 facing the insertion end of the movable part 2 generates a repulsive force by each N pole. 2 returns to the case body 1 in the extending direction. Therefore, it is possible to provide a function equivalent to a case where a coil spring is interposed between the case main body 1 and the movable part 2. Here, as the distance between the two approaches, the repulsive force increases (indicated by arrows in FIGS. 1 and 2).

In this case, since it is not necessary to secure the shrinkage margin unlike the coil spring, it is possible to manufacture the device compactly. Further, even if the size is reduced as in the case of the coil spring, the cost does not increase, and the device can be manufactured at low cost. And, because of the relationship between the natural length and the mounting length as in a coil spring, for example, there is no need to mount it in a contracted state at the time of mounting, so that the mounting work becomes easier and it is easier to respond to automation. it can.

Further, by using the resin magnets 5 and 7, when the case body 1 and the movable portion 2 are formed of resin, the resin magnets 5 and 7 can be manufactured by simultaneous molding. The number of parts and the number of manufacturing steps can be reduced, and the weight can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS. Note that the same parts as those in the above embodiment are denoted by the same reference numerals and described. In FIG. 3, each of the damper units includes a resin-made case body 1 and a movable portion 2 slidably inserted into the case body 1. A bottom portion 4 of the case body 1 and an insertion end of the movable portion 2 into the case body 1 As in the previous embodiment, resin magnets 5 and 7 integrally formed with the case body 1 and the movable portion 2 are embedded on the sides.

Here, the case body 1 and the movable part 2 are provided with a groove 8 surrounded by a protruding part T in the moving direction of the movable part 2. In other words, the case body 1 and the movable portion 2 are formed into a substantially C-shaped irregular cross section by the groove 8,
The resin magnets 5 and 7 embedded therein are formed in a shape different from that of the above embodiment. Specifically, the groove 8 forms a space portion 9 having an arc-shaped cross section as shown in FIG.
Are formed so as to be surrounded by the protrusion T. Therefore, this space portion 9 reduces the substantial space occupied by the damper unit.

That is, since harnesses and the like used for parts arranged in the periphery can be routed in the groove 8, the harness routing usually required to be secured around the damper unit. Space can be secured inside the damper unit. In order to form the deformed damper unit, that is, the case body 1 and the movable portion 2, in addition to molding the case body 1 and the movable portion 2 with resin, the resin magnets 5, 7 are formed in the case. It is desirable to mold the main body 1 and the movable part 2 at the same time.

Therefore, according to this embodiment, harnesses and the like used for peripheral components can be routed by effectively utilizing the groove 8, so that the occupied space is substantially reduced. This can contribute to higher density of parts and downsizing of products used. Further, the harnesses and the like are protected from the surroundings by the protruding portion T. The present invention is not limited to the above embodiment, and for example, a metal magnet or a rubber magnet can be used instead of the resin magnet. Also, the case body 1
If the different poles of the resin magnets 5 and 7 of the movable part 2 and the movable part 2 are opposed to each other, the movable part 2 can be used as a tension spring that moves so as to be pulled into the case body 1 when the movable part 2 is pulled. The shape of the space portion 9 in the second embodiment is not limited to the above shape, and may have any cross-sectional shape as long as the movable portion 2 is configured to be slidable with respect to the case body 1.

[0020]

As described above, according to the first aspect of the present invention, the magnet provided on the end face of the movable part on the case body side and the wall of the case body facing the end face of the movable part are provided. By using the repulsive force or the pulling force of the magnet provided in the unit, it is possible to have the same function as a coil spring, so it does not shrink and expand like a coil spring, making it compact There is an effect that it can be manufactured. Further, even if the coil spring is miniaturized as in the case of a coil spring, the cost does not increase, and there is an effect that it can be manufactured at low cost. And
Due to the relationship between the natural length and the mounting length, such as a coil spring, there is no need to physically shrink or expand when mounting, thus making it easier to perform the mounting work and easily adapting to automation. There are effects that can be.

According to the second aspect of the present invention, when the case main body and the movable portion are formed of resin, the magnet can be manufactured by simultaneous molding, so that the number of parts and the number of manufacturing steps can be reduced. Thus, there is an effect that the weight can be reduced.

According to the third aspect of the present invention, since it is possible to route harnesses and the like used for peripheral parts by effectively utilizing the grooves, a substantial occupied space is reduced. This has the effect of contributing to higher density of parts and downsizing of products used.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the first embodiment of the present invention in a compressed state.

FIG. 3 is a perspective view of a second embodiment of the present invention.

FIG. 4 is a perspective view of a space portion according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 2 Movable part 4 Bottom part (wall part) 5, 7 Resin magnet (magnet) 8 Groove

Claims (3)

[Claims] A movable portion is slidably supported by the case body, and poles are opposed to an end surface of the movable portion facing the case body and a wall portion of the case body facing the end surface of the movable portion. A damper unit characterized in that each magnet is mounted. 2. The damper unit according to claim 1, wherein the magnet is a resin magnet. 3. The damper unit according to claim 1, wherein a groove is provided in each of the case body and the movable part along a moving direction of the movable part.