KR19990018624U - Knob assembly assembly structure of electronic products - Google Patents

Abstract

The present invention discloses a knob assembly assembly structure of an electronic product. In the conventional knob assembly assembly structure, the knobs and the tact switch are easily broken and thus the reliability is lowered, and when the knob assembly is broken, it is impossible to replace the knob assembly. The present invention comprises: support bosses each formed to form concentric circles on the front edges of the knobs, and the diameter of the support bosses extending forward; A locking protrusion formed on an upper surface of the knobs and having an inclined surface inclined at a lower surface thereof; Bosses formed on the rear surface of the front panel so that the knobs are exposed and installed, and the diameter of the bosses is reduced to the rear so as to maintain a predetermined distance from the inner circumferential surface of the support bosses; It is assembled by welding with the front panel and consists of a stopper having a tension plate which is formed in contact with the inclined surface of the locking projection so that the knobs are biased to the initial position. Therefore, the operating positions of the knobs are precisely regulated, so that breakage of the knobs and the tact switch is effectively prevented, and malfunctions of the knobs are prevented, thereby improving product reliability.

Description

Knob assembly assembly structure of electronic products

The present invention relates to a knob assembly of an electronic product, and more particularly, to a knob assembly assembly structure of an electronic product to prevent malfunction of the product and improve reliability of the product.

In general, electronic products are equipped with various types of function selection knobs to set electronic functions. According to an example of an electronic product, a video cassette recorder includes power and play of a video cassette recorder. Modes such as play, eject, review, and the like are performed by manipulation of the function selection knob by the user.

As an example of such an electronic product, as shown in FIG. 1, the video cassette recorder (VCR) is equipped with a front panel (11) on the front of the main chassis (10). The front panel 11 is equipped with a plurality of knob assemblies 12 to enable user manipulation. Thus, the user can perform various functions of the video cassette recorder (VCR) by operating the knob assembly 12.

As shown in FIGS. 2A and 2B, the knob assembly 20 of the related art electronic appliance includes a plurality of knobs 21 having support ribs by tension ribs 22. It is formed to be integrally connected with 23). A plurality of coupling holes 24 are formed in the support ribs 23 of the knob assembly 20, and a pusher 25 is formed at the bottom of the rear surface of the knobs 21, respectively. In addition, installation holes 31 are formed in the front of the front panel 30 so that the knobs 21 of the knob assembly 20 are exposed, and the coupling hole 24 of the knob assembly 20 is formed at the rear of the front panel 30. A plurality of coupling pins 32 inserted through the protrusions are formed to protrude.

On the other hand, after the coupling pins 32 of the front panel 30 are inserted through the coupling holes 24 of the knob assembly 20, the ends of the coupling pins 32 are welded, that is, melted and attached to the knobs. Assemble the assembly 20 and the front panel 30. Accordingly, the tact switch 36 is mounted on the upper surface of the circuit board 35 by the pusher 25 while the tension ribs 22 are elastically deformed according to the manipulation of the knobs 21. Is pressed and activated.

However, the knob assembly assembly structure of the conventional electronics as described above, when the user presses the knobs 31 in front of the front panel 30 to operate, due to the carelessness of the user, the knobs 21 or the tact switch ( 36) was easily broken and the reliability of the product was greatly degraded. That is, when the user presses the knobs 21 with excessive force, the tension ribs 22 are elastically deformed by plasticity and thus cannot be restored to their original state, so that the function of the knob assembly 20 is lost or structurally. As a result, breakage of the weak tension ribs 22 occurs.

In addition, there is a problem that the tact switch 36 is frequently broken because the pusher 25 strongly presses the tact switch 36 when the knobs 21 are operated with excessive force. In particular, when the knob assembly 20 is broken during the use of the product, the replacement of the knob assembly 20 is impossible, there was a problem that greatly acts as a cause of user complaints.

The present invention is devised to solve the conventional problems as described above, the object of the present invention is that the operation position of the knobs is precisely regulated by a simple configuration and structure to prevent damage, as well as the failure of the operation of the knobs It is to provide a knob assembly assembly structure of the electronic products to prevent the improved reliability of the product.

1 is a perspective view illustrating a video cassette recorder as an example of general electronic products;

2a and 2b is a front view and a cross-sectional view showing a knob assembly assembly structure of a conventional electronic product,

3 is a cross-sectional view showing the assembly structure of the knob assembly of the electronic product according to the present invention,

Figure 4 is a cross-sectional view showing an operating state of the assembly assembly of the knob assembly of the electronic product according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

40: knob assembly 41: knob

42: tension rib 43: support rib

44: coupling hole 45: pusher

46: Support Boss 47: Blocking

50: front panel 51: boss

52: mounting hole 53: first coupling pin

54: second coupling pin 55: circuit board

56: tact switch 60: stopper

61: coupling hole 62: tension plate

A feature of the present invention for achieving the above object is that the knob assembly is formed so that the plurality of knobs are integrally connected to the support ribs by the tension ribs, and the pusher is formed on the bottom of the back of the knobs, and the knob assembly by welding In a knob assembly assembly structure of an electronic product comprising a front panel to be installed and a circuit board on which a tact switch operated by pushers of the knobs is mounted, each of which is formed to have concentric circles at the front edges of the knobs and has a diameter toward the front. Support bosses formed to gradually expand; A locking protrusion protruding from an upper surface of the knobs and having an inclined surface inclined at a predetermined angle on a lower surface thereof; Bosses are formed to have a mounting hole in the back of the front panel so that the knobs are exposed and installed, the boss is formed so that the diameter is gradually reduced toward the rear to maintain a predetermined distance from the inner peripheral surface of the support boss; The electronic device is a knob assembly assembly structure of the electronic product, which is assembled by welding with the front panel and is formed of a stopper having a tension plate extending to contact the inclined surface of the locking projection so that the knobs are biased to an initial position.

Hereinafter, one preferred embodiment of a knob assembly assembly structure of an electronic product according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are diagrams for explaining the assembly structure of the knob assembly of the electronic product according to the present invention.

As shown in FIG. 3, the knob assembly 40 is formed such that the plurality of knobs 41 are integrally connected to the support ribs 43 by the tension ribs 42 that are elastically deformable. A plurality of coupling holes 44 are formed in the support ribs 43 of the knob assembly 40, and the support ribs 43 are formed to be positioned below the knobs 41. That is, the knob assembly 40 is a plurality of knobs 41 are connected to the support ribs 43 to produce a single combination, the knobs 41 are made of synthetic resin material by molding, round, oval, other Various shapes can be produced.

In addition, the knob assembly 40 is formed with a pusher 45 formed at the lower back of the knobs 41, and the support bosses 46 are formed at the front edge of the knobs 41 so as to form concentric circles. The bosses 46 are formed such that their diameter gradually expands toward the front. A locking protrusion 47 protrudes from an upper portion of the rear surface of the knobs 41, and an inclined surface 48 inclined at a predetermined angle is formed on a lower surface of the locking protrusion 47. The knob assembly 40 described above shows that the plurality of knobs 41 are connected to the support ribs 43 to be manufactured in one combination, whereas the knob assembly 40 is one in which a knob is manufactured as a single component. Even if it is easy to apply.

On the other hand, the bosses 51 are formed to have mounting holes 52 so that the knobs 41 of the knob assembly 40 are exposed and installed on the rear surface of the front panel 50, and the bosses 51 of the front panel 50 are installed. They are formed in a roughly conical truncated shape so that their diameter gradually contracts backwards. The bosses 51 of the front panel 50 are fitted in a corresponding relationship to the support bosses 46 of the knob assembly 40, with a predetermined gap between the support bosses 46 and the bosses 51. (G) is fitted to hold. That is, the support bosses 46 are formed such that the cross-sectional inner diameter of one part is larger than the cross-sectional outer diameter of the corresponding bosses 51 so that a gap G is formed therebetween.

In addition, a plurality of first coupling pins 53 protrudingly formed in the lower portion of the rear surface of the front panel 50 through the coupling holes 44 of the support ribs 43 to correspond to each other, and the front panel 50 is formed. The second coupling pins 54 protrude from the upper surface of the back side). After the first coupling pins 53 of the front panel 50 are inserted through the coupling holes 44 of the support rib 43, the ends of the first coupling pins 53 are welded, ie, melted, and assembled to the knob assembly. 40 and the front panel 50 are assembled. A circuit board 55 is installed at the rear of the front panel 50, and a tact switch 56 is set on the upper surface of the circuit board 55 for setting functions of electronic products such as the video cassette recorder (VCR) described above. do.

Then, the second coupling pins 54 of the front panel 50 are inserted into the coupling holes 61 of the stopper 60 corresponding to each other, and the ends of the second coupling pins 54 are passed through. The stopper 60 is assembled to the back surface of the front panel 50 by welding. The stopper 60 has a tension plate 62 extending inclined at a predetermined angle to impart a predetermined elastic force to the locking projection 46 of the knob assembly 40 on the lower surface of the tension plate 62. The tip is gradually sharpened to allow elastic deformation. By the elastic force of the tension plate 62, the knobs 41 are biased to an initial position, that is, a position fitted to be exposed to the installation hole 52 of the bosses 51.

The assembly state and the operation state of the knob assembly assembly structure of the electronic product according to the present invention as described above are as follows.

As shown in FIG. 3, the knobs 41 of the knob assembly 40 are fitted into the mounting holes 52 of the front panel 50 to be exposed to the outside, and the support bosses 46 of the knob assembly 40 are exposed to the outside. The bosses 51 of the panel 50 are fitted in a corresponding relationship to each other. That is, when the outer circumferential surface of the bosses 51 are fitted to the inner circumferential surface of the support bosses 46, a gap G is formed between the support bosses 46 and the bosses 51.

Then, the second coupling pins 54 of the front panel 50 are inserted into the coupling holes 61 of the stopper 60 in correspondence with each other, and then the ends of the second coupling pins 54 are welded to each other. The stopper 60 is assembled to the back surface of the panel 50. At this time, the tension plate 62 of the stopper 60 imparts a predetermined elastic force to the engaging protrusion 47 of the knob assembly 40 so that the knobs 41 of the knob assembly 40 may be provided with holes in the front panel 50. Position them correctly at (52). That is, the tension plate 62 biases the knobs 41 to the initial position by the elastic force and compensates for the deformation of the tension ribs 42.

As shown in FIG. 4, when the user selects and presses one of the knobs 41 of the knob assembly 40 in front of the front panel 50, the tension ribs 42 according to the manipulation of the knobs 41. The tact switch 56 of the circuit board 55 is pressed by the pusher 45 while being elastically deformed.

As such, while the knobs 41 of the knob assembly 40 are operated, the inner circumferential surface ends of the support bosses 46 come into contact with the outer circumferential surfaces of the bosses 51 so that the operating positions of the knobs 41 are precisely regulated. In more detail, when the knobs 41 are pressed by the user at an initial position exposed to the mounting holes 52, the knobs 41 are pushed by the elastic deformation of the tension ribs 42. Is operated to the operating position to operate the tact switch 56, wherein the knobs 41 are rotated about the tension ribs 42 and the support boss is operated after the tact switch 56 is operated by the pusher 45. 46 are in contact with the bosses 51 and the position is precisely regulated. That is, the knobs 41 are rotated to some extent from the initial position to the operating position with respect to the tension ribs 32 so that the pusher 35 can actuate the tact switch 36, the rotational movement of these knobs 41. Is regulated after a gap G formed between the inner circumferential surface of the support bosses 46 and the outer circumferential surface of the bosses 51.

Then, when the user removes the operating force, that is, the pressing force of the knobs 41, the tension plate 62 of the stopper 60, which has been deformed by the locking protrusion 47, is restored to its original state by elastic deformation. The knobs 41 of the knob assembly 40 are accurately positioned in the installation holes 52 of the bosses 51. At this time, the tip of the tension plate 62 is in contact with the inclined surface 48 of the locking projection 47 to naturally maintain the rotational movement of the knobs 41, the knobs 41 by the elastic deformation of the tension plate 62 Sudden rotation is prevented.

Thus, the present invention provides an accurate position in which the knobs 41 of the knob assembly 40 can operate the tact switch 56 by the support bosses 46 and the bosses 51 of the front panel 50. Since it is operated, breakage of the knobs 41 and the tact switch 56 can be effectively prevented, thereby significantly improving the reliability of the product. In particular, the present invention, even when the user presses the knobs 41 with excessive force due to the carelessness of the user, the rotation of the knobs 41 is made only to the operating position to prevent malfunction, as well as the rotation of the knobs 41 This is maintained naturally, which greatly improves the reliability of the product.

On the other hand, the above-described embodiment is merely to describe one preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed appropriately within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, according to the assembly structure of the knob assembly of the electronic product according to the present invention, the operation position of the knobs is precisely regulated, which effectively prevents the breakage of the knobs and the tact switch, and also prevents the operation of the knobs. Reliability is significantly improved.

Claims (2)

The knob assembly is formed so that the plurality of knobs are integrally connected to the support ribs by the tension ribs, and a pusher is formed below the rear of the knobs, a front panel on which the knob assembly is installed by welding, and a pusher of the knobs. In a knob assembly assembly structure of an electronic product composed of a circuit board on which a tact switch operated by Support bosses (46) each formed to form concentric circles at the front edges of the knobs (41) and gradually expanding in diameter toward the front; A locking protrusion 47 protruding from an upper surface of the rear surface of the knobs 41 and having an inclined surface 48 inclined at a predetermined angle on a lower surface thereof; The diameter of the knob 41 is formed to have an installation hole 52 in the rear surface of the front panel 50 so that the knobs 41 are exposed and installed, and the diameter of the support boss 46 is maintained at a predetermined distance G from the inner circumferential surface of the support bosses 46. Bosses 51 which are formed to be gradually reduced toward the rear; A stopper having a tension plate 62 assembled with the front panel 50 by welding and extending to contact the inclined surface 48 of the locking projection 46 so that the knobs 41 are biased to an initial position. Knob assembly assembly structure, characterized in that consisting of 60). 2. The assembly of a knob assembly of an electronic product according to claim 1, wherein a tip of said tension plate is formed gradually sharply to enable elastic deformation.