JPS6113008A - Mount boss - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a molded mounting boss used when connecting a cabinet back to a set front cabinet on a TV.

Conventional technology When connecting a cabinet back to a TV set front cabinet, hollow cylindrical mounting bosses were provided at multiple locations on the inner surface of the front cabinet to protrude rearward at a certain height, and the cabinet back was attached to the end face of the mounting boss. With the inner surfaces butted against each other, a tapping screw was screwed in from behind to secure them in place. Such a mounting boss is molded integrally with the front cabinet. For example, as shown in FIG.
Problems to be Solved by the Invention However, with the conventional mounting boss structure as described above, In order to increase the length in order to obtain the necessary protrusion height from the inner surface of the front cabinet, the pin 1a of the male die 1 of the plastic mold for molding it would have to be made considerably longer. If the pin 1a is too long as described above, the pin 1a may break or become bent when the mold is released after molding, and in extreme cases, there will be a problem that the mold cannot be released. Therefore, the length of the pin 1a could not be increased too much. As a result, the above-mentioned required protrusion height of the mounting boss may not be obtained. Therefore, in the past, after manufacturing the front cabinet, a separate long member that acted as a boss was attached to the inner surface of the front cabinet by gluing, etc., but since it was a post-processing process, the work was troublesome and complicated. That wasn't exactly what I wanted.

Indispensable Means to Solve the Problems (Technical Problems) This invention has been proposed to solve the above-mentioned conventional problems, and includes a method of combining and connecting a first member and a second member. In the mounting boss, the protruding height of the mounting boss can be raised only to the required height without any hindrance, and the screwing work to the mounting boss can be reliably performed when the first member and the second member are connected as described above. It is intended to be.

(Technical Means) In order to achieve the above-mentioned technical problem, the present invention provides a mounting boss that connects and connects a first member and a second member, the mounting boss having a tip portion attached to one surface of the first member. Adopts a structure in which a cylindrical boss body having a split is formed protrudingly, and a sleep-shaped boss body that is externally fitted onto the cylindrical boss body is protruded from a portion of the second member facing the cylindrical boss body. are doing.

action The effects of the present invention are as follows.

Since a slit is provided at the tip of the cylindrical boss body protrudingly formed on the first member, in the mold for molding this, a male pin that forms the inner space of the cylindrical boss body is inserted. A rib-like portion for forming the slot is inevitably formed at the base of the pin, and the rib-like portion plays the role of reinforcing the pin. Therefore, there is no need to break or bend the pins, which conventionally occurs when the mold is released. Therefore, the length of the pin can be made sufficiently long without any problem, and the protrusion height of the cylindrical boss body from the first member can be increased by the necessary height accordingly. In other words, the protruding height of the cylindrical boss body can be increased by a height corresponding to the slit formed by the rib-shaped portion.

Furthermore, when the first member and the second member are combined, the sleeve-like boss body is fitted onto the cylindrical boss body, so the slotted part is covered from all four circumferences, and the second member Even when the tapping screw is screwed into the cylindrical boss body through the component, the slotted part will not be pushed outwards and the so-called "screw looseness" will not occur, allowing for reliable screw tightening work. It can be carried out.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the main part of the present invention, and FIG. 2 shows an example in which the present invention is applied to the assembly of a cabinet back to a set front cabinet on a TV.

In these figures, cylindrical boss bodies 11, 11 are formed at two upper parts of the inner surface of the front cabinet 10 to protrude rearward at a constant height. Moreover, cylindrical boss bodies 12 and 12 are formed to bulge out at two locations on the bottom surface. Among them, the cylindrical boss bodies 11, 11 provided at two upper parts are according to the present invention. A slit 13 along the axial direction is formed at the tip of the cylindrical boss body 11 with a required length.

On the other hand, at the upper inner surface of the cabinet back 20 that is assembled to the front cabinet 10, a cylindrical boss body 11
．． A sleep-shaped boss body 21.21 is located opposite to 11.
is protruding from the front. The sleep-shaped boss body 21 has a cabinet bank 20 that is connected to the front cabinet lO.
When assembled, it is fitted onto the cylindrical boss body 11 and covers the entire outer periphery of the slotted portion 13.

Sleeve-shaped boss body 21 on the rear surface of the cabinet back 20
．． A recess 22 is formed at a position 21 and a position facing the cylindrical boss bodies 12, 12, and an insertion hole 23 is formed at the inner bottom thereof. Through this insertion hole 23, the tubbing screw f is inserted into the cylindrical boss body 11, 11 and 12.
．． It is designed to be screwed into 12.

The cylindrical boss body 11.11 is made up of a male die 30 having a pin 31 forming the inner space of the boss body and a female die 40 having a concave portion 41 forming the outer shape of the boss body as shown in FIG. The front cabinet 10 is integrally molded at the same time as the front cabinet 10 is molded using a plastic mold. A rib-shaped portion 32 forming a slot 13 is integrally provided at the base of the pin 31 of the male mold 30. The rib-shaped portion 32 is for forming the slot 13 and also has the function of reinforcing the pin 31. Therefore, the strength of the bin 310 increases,
After molding the cylindrical boss body 11.11, when the male die 30 and the female die 40 are released, the pin 31 is no longer bent or broken, which is the case in the past. Therefore, the length of the pin 31 can be made sufficiently long by the necessary length. As a result, pin 31
The protrusion height of the cylindrical boss body 11.11, which can be regulated by the protrusion length of the cylindrical boss body 11.11, increases by an amount approximately corresponding to the height of the rib-like portion 32, that is, the length of the slot 13 in the axial direction.

In the above configuration, when the cabinet bank 20 is combined with the front cabinet 10, the sleeve-shaped boss body 21 is fitted onto the slot 13 of the cylindrical boss body 11, as shown in FIG. At the same time, the tip surfaces of the cylindrical bosses 11.11 and 12.12 are pressed against the recesses 22 on the inner surface of the cabinet back 20. Next, when the tapping screw 50 is screwed in from the rear of the cabinet back 20 through the insertion hole 23, the tapping screw 50 is screwed into the inner space of the cylindrical boss bodies 11.11 and 12.12, and the front cabinet 10 and The screw fixation of the cabinet bank 20 is removed. In this case, since the sleeve-shaped boss body 21 is fitted onto the tip of the cylindrical boss body 11.11, the slit portion 13 is prevented from being pushed outward by screwing in the tapping screw 50. This prevents the so-called "pan screw looseness". Therefore, reliable screw tightening work can be performed. Therefore, in order to prevent the slot 13 from expanding due to the screwing operation, the outer diameter of the cylindrical boss body 11 is It is desirable that the clearance between the inner diameter of the sleeve-shaped boss body 21 and the inner diameter of the sleeve-shaped boss body 21 be as small as possible.

When the tapping screw 50 is screwed in in this manner, the assembly of the cabinet back 20 to the front cabinet 10 is completed.

Effects of the Invention As is clear from the above explanation, the mounting boy according to the present invention has the advantage that, by providing the slot, the length of the slot allows the first member to be extended by a height approximately corresponding to the length of the slot. The protrusion height of the cylindrical boss body from the cylindrical boss body can be increased. therefore,
It is no longer necessary to form a long member corresponding to the cylindrical boss body as a separate member and attach it to the first member in several post-processing steps, such as by adhesion, as in the conventional method. Furthermore, when the second member is assembled to the first member, the sleeve-shaped boss protruding from the second member is fitted onto the cylindrical boss body, and the outer periphery of the slotted portion is covered with the sleeve-shaped boss. Therefore, when the tapping screw is screwed into the inner space of the cylindrical boss through the second member, the slotted part is prevented from being pushed and expanded by the screwing operation, and the so-called "one screw failure" phenomenon is prevented. Therefore, good and reliable screw fastening work can be performed.

Therefore, the second member can be reliably assembled to the first member by screwing.

Although the above embodiment describes the case where the present invention is applied to the assembly of a cabinet back to the front cabinet of a TV set, the present invention is not limited to this, and may be applied to assembly using other screws. It can be widely applied as a mounting boss between certain members.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the main parts of the present invention, Fig. 2 is a perspective view showing the cabinet structure of a TV set to which the present invention is applied, and Fig. 3 is a perspective view showing the cabinet structure of a TV set to which the present invention is applied. FIG. 4 is a sectional view illustrating a mold structure in which a cabinet back is assembled to the front cabinet of a TV set using the mounting boss according to the present invention, and FIG. 1 is a cross-sectional view showing the structure of a mold used in 10...Front cabinet (first member)
. 20...Cabinet back (second part). 13... Suriwari. 11...Cylindrical boss body. 21... Sleeve-shaped boss body. Patent applicant: NEC Home Electronics Co., Ltd. Figure 3

Claims (1)

[Claims] (1) A mounting boss for combining and connecting a first member and a second member, wherein a cylindrical boss body having a slit at the distal end is formed protrudingly on one surface of the first member, and A mounting boss characterized in that a sleeve-shaped boss body, which is fitted onto the outside of the cylindrical boss body, protrudes from a portion of the second member that faces the cylindrical boss body.