JPH0755734Y2 - Operation knob mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is arranged in a row on an operation knob, particularly an operation panel attached to the front of a cassette tape player for a vehicle,
The present invention relates to the improvement of the mounting structure of the operation knob for operating the internal switch.

[Conventional technology]

Generally, in order to attach the above-mentioned operation knob to the operation panel, a method of exposing the head of the operation knob to the front side from the back side of the operation panel with respect to the attachment holes which are provided side by side in the operation panel is generally used. Was used. However, recently, when the number of operation knobs increases, the product becomes smaller, and only the head of the operation knob becomes larger due to operability, the space between the operation knobs becomes very narrow and There is no space left to push the control knob from.

Therefore, a structure has been developed in which the operation knob is attached to the attachment hole from the front side of the operation panel, and the structure is as shown in FIGS. 5 to 7. That is, FIG. 5 shows a conventional mounting structure for an operating knob. FIG. 5 is a separated perspective view before mounting, FIG. 6 is a partially sectional side view of the same, and FIG. 7 is a sectional view in a mounted state. In these figures, 1 is an operation panel (nose) attached to the front surface of the audio equipment set. The operation panel 1 is provided with a mounting hole 3 for the operation knob 2 having a substantially rectangular shape, a stopper flange frame 3a for the operation knob 2 is formed at the back of the opening edge of the installation hole 3, and the opening edge is also formed. A pair of supporting pieces 4 having an arc-shaped cross section is vertically provided above.

On the other hand, the operation knob 2 is provided with a switch pressing element 5 projecting substantially at the center of the rear surface, and is provided with locking claws 6a and 6b at the substantially central positions of the upper and lower edges, respectively. Tapered portions 7a and 7b that serve as guides when inserting into the hole 3 are formed at the tip. Further, on the left and right of the base portion of the upper locking claw 6a, there are provided small columnar support rods 8.8 that come into contact with the support pieces 4 described above.

To attach the operation knob 2 to the mounting hole 3, the upper locking claw 6a is passed between the support pieces 4 and 4 of the mounting hole 3 and the locking claws 6a and 6b are inserted.
The elasticity is possessed by the snap-in engagement while being guided by the tapers 7a and 7b. After mounting, the supporting rods 8 and 8 that are in contact with the supporting pieces 4 and 4 serve as an operation fulcrum, and when the surface of the operation knob 2 is pressed, the switch presser 5 pushes up the corresponding switch in a slightly diagonally upward operation and the desired switch is pressed. Is supposed to get the behavior of.

[Problems to be solved by the device]

However, according to the above-described conventional operation knob mounting structure, since the locking claws 6a and 6b are only engaged with the back side of the opening edge of the mounting hole 3, the operation knob 2 is loose in the mounted state. It was weak against shock and very easy to come off.

The present invention has been made by paying attention to the problems of the related art, and has solved the problems, prevents the operation knob from rattling in the mounted state, and has a structure for mounting the operation knob that is strong against impact and hard to come off. It is intended to be provided.

[Means for Solving the Problems]

In order to achieve this object, the mounting structure of the operating knob according to the present invention has an operating panel provided with mounting holes, a switch mounted on a printed circuit board arranged behind the operating panel, and a switch of this switch. The operation knob is provided with a switch pusher for performing a switching operation on a rear surface thereof, and the operation knob is provided with an engaging portion that is engaged with a rear surface of the operation panel through a mounting hole from a front surface of the operation panel. It is characterized in that it is provided so as to be deformable, and a pressing member is provided adjacent to the engaging portion so as to suppress the elastic deformation of the engaging portion in the direction away from the rear surface of the operation panel.

[Action]

As described above, in the operating knob mounting structure according to the present invention, the pressing member provided adjacent to the engaging portion of the operating knob suppresses the elastic deformation of the engaging portion in the direction away from the rear surface of the operation panel. The position of the operation knob is fixed, the play is eliminated, and the operation knob is hard to come off.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to FIGS. The same parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a perspective view of an operation panel 1 in which an operation knob attachment structure according to the present invention is implemented, FIG. 2 is a side sectional view of a main part showing a state in the middle of attachment of the operation knob, and FIG. 3 is a lens part. A sectional side view and FIG. 4 are side sectional views in a state where the mounting is completed.

The operation panel 1 is provided with mounting holes 3, 3, ... As in the conventional case, and the operation holes 2, 3 ... Are also mounted in the mounting holes 3, 3 ,. In the figure, 10 is a cassette tape insertion / ejection port, 11 is a display panel mounting port, and 12 is a mounting port for a volume knob or the like.

First, as in the conventional example, the operation knob 2 has a pair of support pieces 4 in which an upper engaging claw 6a is vertically provided above an opening edge of the mounting hole 3.
By fitting the locking claws 6a and the lower locking claws 6b in a snap-in engagement with each other by the elasticity thereof, the locking claws 6a and 6b are engaged with the back surface of the operation panel 1. In this state, the mounting structure of the conventional example is obtained, but in the case of this embodiment, the lens 13 is further fitted from the rear of the mounting port 3. This lens
13 is made of plastic, and is for illuminating the display on the surface of the operation knob 2 with a light source arranged behind this lens 13. A protrusion 14 for fitting is integrally formed, and the switch pusher 5 of the operation knob 2 is penetrated through the protrusion 14 and a switch 16 mounted on the printed circuit board A is provided on the rear surface thereof.
A through hole 15 that communicates with the space 15a in which the is accommodated is provided. The through hole 15 has an inner diameter larger than the diameter of the switch pressing element 5 so that the operation of the switch pressing element 5 is not hindered. The switch pusher 5 of the operation knob 2 is inserted into the through hole 15, and the protrusion 14 is fitted into the mounting hole 3 from the back side of the operation panel 1 to operate the operation knob 2.
Although the attachment is completed, the upper surface of the projection 14 in this state presses the upper locking claw 6a inserted between the support pieces 4 from below.

In addition, on the front surface of the lens 13, a white coating portion 13a that diffusely reflects light in the lens 13 and a black coating portion 13b that is overlapped with the white coating portion 13a to prevent light from leaking to the outside are formed. Has been done.

According to the mounting structure of the operation knob according to the present embodiment, the protrusion 14 of the lens 13 is fitted into the mounting hole 3 from the rear of the operation panel 1 in the direction opposite to that when the locking claws 6a and 6b are snap-in engaged. Since the locking claws 6a and 6b are prevented from coming off from the mounting hole 3 by being elastically deformed, the operation knob 2 is free from rattling and has a structure that is very difficult to come off.

[Effect of device]

As described above, according to the attachment structure of the operation knob according to the present invention, the operation knob does not rattle in the attached state, and is hard to come off even if a slight impact is applied.

[Brief description of drawings]

FIG. 1 is a perspective view of an operation panel in which the operation knob mounting structure according to the present invention is implemented, FIG. 2 is a sectional view of an essential part during the installation, and FIG. 3 is a partial sectional side view showing an essential part of the lens. Figures 4 and 5 show a cross-sectional view of the main parts in the same mounting state, Fig. 5 shows a conventional example, a perspective view of the separation of the main parts before mounting, Fig. 6 a cross-sectional side view of the same part, and Fig. 7 the same mounting state. FIG. DESCRIPTION OF SYMBOLS 1 ... Operation panel, 2 ... Operation knob, 3 ... Mounting hole, 4 ... Support piece, 5 ... Switch pressing element 6a, 6b ... Locking claw (engaging portion), 8 ... Support rod, 13 ... Lens, 14
… Protrusions (holding members), 15… Through holes, 16… Switches

Claims (1)

[Scope of utility model registration request] 1. An operation panel provided with a mounting hole, a switch mounted on a printed circuit board disposed behind the operation panel, and a switch pusher for performing a switching operation of the switch on a rear surface. The operation knob is provided with an engaging portion which is elastically deformable and which engages with the rear surface of the operation panel through the mounting hole from the front surface of the operation panel and is adjacent to the engaging portion. And a holding member for holding the elastic deformation of the engaging portion away from the back surface of the operation panel, the operating knob mounting structure.