JPH0679191U - Knob mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a knob mounting structure that can be easily attached to the end of a rotary shaft with one touch and that is less likely to come off. [Structure] A pair of axial locking grooves (3A) arranged at opposing positions on the inner surface of the socket (3), an engaging portion (12A) formed at the end of the rotary shaft, and a locking groove ( 3A) and the engaging portion (12A) are both engageable, and the engaging portion (12A)
A knob mounting structure including a locking member (2) that is press-fitted into the socket portion (3) together with the rotating shaft (12) in a state of being locked to the locking groove (3A).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a knob mounting structure, more specifically, a knob attached to an end of a rotary shaft that is involved in the operation of an operation shaft such as a volume or an adjustment shaft exposed to the outside of a housing in an electronic device or an electric device. For knob mounting structure for car.

[0002]

[Prior art]

 Conventionally, this kind of knob has been designed such that a part of the operation shaft or the adjustment shaft is preliminarily protruded from the operated device or the member to be adjusted arranged inside the device casing to the outside of the casing, and the knob is fitted to the end portion thereof. It is configured to be attached by mating. Such knobs are generally operated by the fingertips of a person, and are attached to a rotating shaft that does not require much torque, so the knob itself is of a structure and material that can withstand such torque. It only needs to be present, and in recent years, it has been molded with a resin material or the like.

3 to 5 show such a conventional knob mounting structure. In FIG. 3, 10 is the knob, 11 is a member to be adjusted on the side where the knob 10 is mounted, 12 is an adjusting shaft (rotating shaft) thereof, and the member 11 to be adjusted is inside a casing (not shown). The end of the rotary shaft 12 is exposed to the outside of the housing. The center of the knob 10, which is made of resin or the like, is formed in a socket shape so that it can be attached. 10A is a shaft mounting hole for the knob 10 and 10B is a set screw hole for restraining idle rotation due to bidirectional sliding, with the rotating shaft 12 fitted in the mounting hole 10A, and 13 is a screw hole 10B. It is a set screw that is screwed together. On the other hand, a cut groove 12A for a driver is formed at the end of the rotary shaft 12 for finely rotating the knob 10 before fixing the knob 10 to the rotary shaft 12 and positioning the rotary position.

In the knob mounting structure configured as described above, after the rotary shaft 12 is positioned at a predetermined rotary position, the tip of the rotary shaft 12 is press-fitted into the mounting hole 10A of the knob 10, Then, the set screw 13 is screwed into the set screw hole 10B, and the tip of the screw is engaged with a stop hole (not shown) on the side of the rotating shaft 12 to fix the knob 10 to the rotating shaft 12. You can

FIG. 4 and FIG. 5 show another conventional example. In FIG. 4, a male spline portion 12C formed at a tip end portion of a rotary shaft 12 is press-fitted into a female spline portion 10C on the knob 10 side to perform a serration coupling. It is something that is done. Further, in FIG. 5, a notch 12D is formed at the tip of the rotary shaft 12, and the mounting hole 10D on the knob 10 side is shaped to match the notch 12D. The notch 12D of the rotary shaft 12 is formed. This is an example in which the fixed state is maintained by fitting both parts by press fitting them into the mounting hole 10D.

As the attachment structure of the knob, in addition to the conventional examples described above, many structures in which these are appropriately combined are known.

[0007]

[Problems to be solved by the device]

 However, among the conventional examples as described above, the example shown in FIG. 3 has troublesome relative positioning between the rotary shaft and the knob for fixing, and must be fixed by the set screw one by one. It takes time and effort. Further, in the conventional example as shown in FIGS. 4 and 5, the mounting is relatively easy, but it is easy to loosen, and there is a possibility that it will come out unless it is done with an adhesive or the like.

An object of the present invention is to eliminate such drawbacks of the prior art and to provide a knob mounting structure that can be mounted on the end of a rotary shaft with one touch and that does not easily come off. is there.

[0009]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a knob mounting structure in which a socket portion of a knob is press-fitted and attached to an end portion of a rotary shaft related to operation of a device, and the socket portion is arranged at a position facing the inner surface of the socket portion. A pair of axial locking grooves that are provided, an engaging portion formed on the rotary shaft end portion, and both the engaging portion and the locking groove are engageable, and the rotary shaft end And a locking member that is press-fitted into the socket together with the rotary shaft in a state of being locked to the locking part of the section and that engages with the locking groove.

[0010]

[Action]

 According to the present invention, the locking member is attached by pressing the rotation shaft end together with the locking member into the socket of the knob while the locking member is locked to the locking shaft end. It is possible to engage with a pair of locking grooves provided at positions facing the inner surface of the socket portion, and thus, only by interposing the locking member between the end portion of the rotary shaft and the socket portion of the knob, The knob can be more easily fixed to the end of the rotary shaft by press fitting.

[0011]

【Example】

 Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Here, in order to make the description easy to understand, the structure of the knob 1 according to the present invention is shown in a sectional view. It is desirable that the knob 1 be formed of a resin material having elasticity, and it be inexpensive and electrically insulating. 2 is made of elastic metal such as steel wire and is formed in a U-shape. It engages with both the rotating shaft 12 of the member to be adjusted 11 and the knob 1 to function as a rotation stopper and also as a stopper. It is a functioning member (hereinafter simply referred to as a locking member).

That is, the locking member 2 has a linear portion 2A that engages with the cut groove 12A at the end of the adjusting shaft 12, and is bent in the circumferential direction from the linear portion 2A, and extends along the inner surface of the socket portion 3 of the knob 1. And a locking arm 2B that engages with a locking groove 3A (see FIG. 2) provided in the axial direction. In this example, when fixing the knob 1 coaxially with respect to the rotation direction of the rotation shaft 12, two pairs of locking grooves 3A are formed so as to keep the angle of 90 ° so that two directions can be selected. As described above, at least one pair of the engaging grooves 3A may be formed, and a plurality of pairs may be formed. 3B is a slit provided in the axial direction of the socket portion 3, and 3C shown in FIG. 1 is a fixing portion which is provided so as to project from the bottom portion of the socket portion 3 and which keeps the locking member 2 in the engagement state with the cut groove 12A. Is.

Further, in the pair of locking grooves 3A as in this example, the vicinity of one locking groove forming portion on the end face of the socket portion 3 is cut one step lower to form a stepped portion 3D. When the locking member 3 is locked by using the locking groove 3A by using the attachment portion 3D, the case where the locking groove 3A in the other direction is used and this is distinguished from one locking groove 3A is doing. Furthermore, the locking member 2 may be a plate-shaped member shown in FIG. 1, for example, instead of the U-shaped member shown in this embodiment. However, in this case, it is desirable that the cutting depth of the kerf 12A provided on the rotary shaft 12 side be set to a certain depth.

In mounting the knob 1 on the rotating shaft 12 such as the adjusting shaft by the knob mounting structure as described above, first, the linear portion 2A of the locking member 2 is fitted into the cut groove 12A of the shaft 12. The parallel locking arms 2B are arranged along the shaft 12, and the locking arms 2B are fitted into the pair of locking grooves 3A provided in the socket portion 3 of the knob 1 so that the shaft 12 is fixed. Press into the socket 3. In this case, at least one of the spring property of the locking member 2 itself and the elasticity obtained through the slit 3B acts on the socket portion 3, so that the knob 1 and the rotating shaft 12 are securely engaged with each other. It is possible to prevent the knob 1 from slipping out of the rotary shaft 12 due to the frictional force of the engaging portion due to these spring characteristics.

In the above-mentioned embodiment, the linear portion 2A of the locking member 2 is engaged by using the driver operating cut groove 12A formed at the end of the rotary shaft 12. The application of the present invention is not limited to such a locking means, but as a locking member, a part of the locking member is engaged with the rotating shaft in a one-touch manner, and when the socket part is press-fitted, the socket part is pressed. Any structure may be used as long as it is elastically locked in the locking groove provided on the inner surface.

[0017]

[Effect of device]

 As has been described above, according to the present invention, a pair of axial locking grooves arranged at opposing positions on the inner surface of the socket portion, an engaging portion formed at the end of the rotating shaft, and the engaging portion. It is engageable with both the attachment portion and the locking groove, and is press-fitted into the socket portion together with the rotation shaft in a state of being engaged with the engagement portion at the end of the rotation shaft, Since it is equipped with a locking member that engages, it is extremely easy to attach the knob to the end of the rotating shaft with one touch, and it is possible to prevent the knob from coming out and loosening, and to obtain the knob at a low cost. A structure can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an example of the configuration of the present invention.

FIG. 2 is a perspective view showing details of the structure of a knob and a locking member according to the present invention.

FIG. 3 is an exploded perspective view showing a configuration of a conventional example.

FIG. 4 is a perspective view showing an exploded configuration of another conventional example.

FIG. 5 is a perspective view showing an exploded configuration of still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Knob 2 Locking member 2A Linear part 2B Locking arm 3 Socket part 3A Locking groove 3B Slit 3C Fixed part 11 Adjusted member 12 Adjustment shaft (rotating shaft) 12A Cut groove

Claims (1)

[Scope of utility model registration request] 1. A knob mounting structure in which a socket portion of a knob is press-fitted and attached to an end portion of a rotary shaft related to operation of a device, and a pair of axial direction members disposed at opposing positions on the inner surface of the socket portion. A locking groove, an engaging portion formed at the end of the rotating shaft, and an engaging portion engageable with both the engaging portion and the engaging groove, and attached to the engaging portion at the end of the rotating shaft. And a locking member that is press-fitted into the socket portion together with the rotation shaft in such a state that the locking member is engaged with the locking groove.