Joint with a protrusion rod for furniture

A joint with a protrusion rod has a male buckle and a female buckle engaged with each other. The male buckled has a hollow insertion stub with multiple expansion slots and has a receiving hole to movably receive a protrusion rod. A distal end of the protrusion rod is movably engaged with the insertion stub. The protrusion rod has a locking plate and multiple fins correspondingly engaged with the expansion slots when the protrusion rod is wedged into the insertion stub. By having the above structure, difficulty of disengagement of the protrusion rod from the insertion stub is significantly increased to prevent the disengagement of the male buckle and the female buckle. Thus, the joint has increased combination strength and is excellent in utility.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a joint and, more particularly, to a joint having a protrusion rod for a furniture combination.

2. Description of Related Art

Conventional furniture is assembled by immovable joints between parts which are easily damaged during transportation or moving and occupy huge space. Therefore, the transportation cost is correspondingly increased. Currently, assembled furniture is published to the market and is disassembled into parts for packing. By transporting the assembled furniture in pieces, the occupied space and transportation cost are significantly reduced, and damage caused by bumping during transportation is also avoided. The assembled furniture is mostly detachably combined by means of screws and nuts or screws and metal hinges. The adoption of such means has drawbacks such as that the parts of furniture are drilled to make holes at connection places. The holes enlarge or deform after reassembling the parts several times, and, thus, the furniture has poor stability and is easily damaged. Moreover, gaps of the conventional assembled furniture are large, making the appearance not neat.

The conventional joint has a male buckle and a female buckle. The male buckle has a Z-shaped protrusion rod engaged with a base. The base has an insertion part formed at one end surface integrally, and the insertion part has expansion slots. The interior of the insertion part abutting to the base has a recess. The protrusion rod is movably mounted on the base and has its upper surface flush with an upper end surface of the base. A lower end of the protrusion rod is received inside the recess of the insertion part and is movable in a limited range. The female buckle is a cylinder with a receiving hole and has stops formed inside the receiving hole. When the insertion part of the male buckle inserts into the receiving hole of the female buckle, the protrusion rod locates in position. Although the foregoing structure allows the parts of the furniture to be assembled, the assembled furniture is easily deformed or can even break apart when users load weight or pressure on the furniture and the protrusion rod disengages from the receiving hole. Stability and safety of the disassembled furniture with the conventional joints are insufficient.

SUMMARY OF THE INVENTION

A main objective of the present invention is to provide a joint with a protrusion rod for furniture which is stable and has an enhanced combination efficiency.

To achieve the foregoing objective, the joint with a protrusion rod comprises a male buckle and a female buckle engaged with each other. The male buckle has a hollow insertion stub with multiple expansion slots and has a receiving hole. A protrusion rod is movably received inside the receiving hole of the male buckle and has a locking plate mounted the protrusion rod and multiple fins correspondingly aligned with and operationally engaged with the expansion slots when the protrusion rod is wedged into the insertion stub.

A joint with a protrusion rod in accordance with the present invention has a male buckle and a female buckle engaged with each other. The male buckle has a hollow insertion stub with multiple expansion slots and has a receiving hole to movably receive a protrusion rod. A distal end of the protrusion rod is movably engaged with the insertion stub. The protrusion rod has a locking plate and multiple fins correspondingly engaged with the expansion slots when the protrusion rod is wedged into the insertion stub. By having the above structure, difficulty of disengagement of the protrusion rod from the insertion stub is significantly increased to prevent the disengagement of the male buckle and the female buckle. Thus, the joint has increased combination strength and is excellent in utility.

As shown inFIGS. 1 to 8, a preferred embodiment of a joint with a protrusion rod in accordance with the present invention comprises a male buckle1and a female buckle2engaged with each other. The male buckle1has a hollow insertion stub3with multiple expansion slots4and has a receiving hole (not numbered) to movably receive a protrusion rod5. A distal end of the protrusion rod5is movably engaged to the insertion stub3. The protrusion rod5has a locking plate6mounted thereon by a mount and has multiple fins7correspondingly aligned with the expansion slots4. When the protrusion rod5is wedged into the insertion stub3, the multiple fins7are engaged with the expansion slots4respectively.

Before assembling the parts of the furniture for delivery from factory, a horizontal board part has a first adopting hole at an end, and the male buckle1is wedged into the first adopting hole. A vertical supporting part has a second adopting hole at a side, and the female buckle2is secured into the second adopting hole. When the parts are assembled, the end of the horizontal board part is placed close to the horizontal supporting part to insert the insertion stub3into the female buckle2. Then, the locking plate6is pushed to insert the distal end of the protrusion rod5into the insertion stub3and to expand the insertion stub3. Meanwhile, the fins7of the protrusion rod5insert into the expansion slots4respectively to enhance the security of combination of the protrusion rod5and the insertion stub3. Therefore, difficulty of disengagement of the protrusion rod5from the insertion stub3is significantly increased to prevent the disengagement of the male buckle1and the female buckle2. Thus, the joint has increased combination strength and is excellent in utility.

In the embodiment of this invention, the number of the expansion slots4is two, and the number of the fins7is the same as the one of the expansion slots4. The expansion slots4are evenly defined around the insertion stub3. In the preferred embodiment of the present invention, the number of the expansion slots4and the fins7are four, or selectively two, three or five. When the distal end of the protrusion rod5is pushed toward and into the insertion stub3, the insertion stub3is expanded to avoid the insertion stub3disengaging from the female buckle2.

The male buckle1in the preferred embodiment has a recess for accommodating the locking plate6and its mount. The recess includes a dovetail-shaped recess8so that the locking plate6is protected from breaking when the locking plate6is driven and tilted. The lifespan of the locking plate6is increased.

In the preferred embodiment of the present invention, a front surface of the locking plate6is spaced from the front end of the male buckle1with a gap when the protrusion rod5is accommodated in the receiving hole of the male buckle1, and the distal end of the protrusion rod5is wedged into the insertion stub3(as shown inFIG. 7). When the protrusion rod5is pushed backward into the receiving hole of the male buckle1, a flat screwdriver is inserted into the gap to push the locking plate6to drive the protrusion rod5backward to the receiving hole.

In the preferred embodiment of the present invention, a rear end of the locking plate extends out of the recess when the protrusion rod5is pushed backward to the receiving hole. When the locking plate6is pushed to wedge the protrusion rod5into the insertion stub3, the rear end of the locking plate6is pushed inward without obstruction of the sidewall of the male buckle1so that assembly of the joint is easy and quick and has excellent utility.

In the preferred embodiment of the present invention, the locking plate6has multiple anti-slip grooves10which facilitate the pushing of the locking plate6when the friction between the protrusion rod5and the insertion stub3is small.

As shown inFIG. 3, in the preferred embodiment of the present invention, the male buckle1is composed of two semi-bodies. One of the semi-bodies has a tenon11, and the other semi-body has a corresponding mortise12to engage the tenon11with the mortise12. When the male buckle1is assembled, the protrusion rod5is placed in the receiving hole of one semi-body. Then, the other semi-body is driven to close to wedge the tenon11into the mortise12. Thereby, the male buckle1is quickly assembled.

Moreover, the male buckle1and the female buckle2have multiple annular stops defined on an outer periphery. Therefore, the male buckle1and the female buckle2have a strong combination with the parts of the furniture when wedged into the first adopting hole and the second adopting hole to increase the excellent stability of the joint in combination with the parts of the furniture.

The periphery of the male buckle1further has multiple dimples13for accommodating glue. When the first adopting hole is filled with glue, the dimples13keep the glue inside the first adopting hole to improve the adhesive efficiency of the glue.

In the preferred embodiment of this invention, the female buckle2has a cover14mounted to a rear end thereof to avoid wood flour or glue entering the female buckle2, which might affect the operation of the female buckle2.

As shown inFIG. 9, another preferred embodiment of the joint in the present invention has the same configuration with the forgoing one except the recess of the male buckle1for receiving the locking plate6is of an inverted T-shape to fit an inverted T-shaped recess9.