Door hinge device

Abstract

A door hinge device having a first hinge seat, a second hinge seat, a first linkage, a second linkage, a third linkage, an elastic pushing rod, a buffer rod, and a supporting rod is provided. A first supporting pivot and a second supporting pivot are respectively arranged on the first hinge seat and the second hinge seat. The first linkage, the second linkage, the third linkage, and the second hinge seat together form a four-bar linkage. A abutting member is arranged on the third linkage. The elastic pushing rod is arranged on the first linkage and in sliding contacts with the abutting member through a pulley. A buffer member is arranged on the second hinge seat. The buffer rod is arranged on the second linkage and abutted against the buffer member. The supporting rod is pivoted between the first supporting pivot and the second supporting pivot through the third linkage.

Description

Technical Field

[0001] The present invention relates to a hinge, in particular to a door hinge device applicable to refrigerators or cold storages. Prior Art

[0002] Existing hinge structures used in refrigerator and cold storage doors, due to their relatively heavy weight, must not only provide sufficient support, but also ensure instant opening and closing, prevent the door from instantly impacting the cabinet when closed, and automatically close when approaching the cabinet. Consequently, existing hinge structures often fail to effectively achieve these functions due to insufficient support.

[0003] In view of this, the present inventor has conducted intensive research and applied scientific theories to improve and resolve the above-mentioned deficiencies, and finally proposed the present invention which has a reasonable design and effectively improves the above-mentioned deficiencies. Summary of the Invention

[0004] The main purpose of the present invention is to provide a door hinge device that further provides better supporting force, thereby achieving the functions of a refrigerator or cold storage door that can be opened and stopped at will, without instantaneous impact when closing, and automatically closing.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a door hinge device, including a first hinge seat, a second hinge seat, a first connecting rod, a second connecting rod, a third connecting rod, an elastic pressure rod, a buffer rod and a support rod; the first hinge seat has a first fixed portion, and a first pivot portion provided on the first fixed portion, and a first fixed pivot point and a first support pivot point are provided on the first pivot portion; the second hinge seat has a second fixed portion, a second pivot portion provided on the second fixed portion, and a buffer member provided on the second hinge seat, and a buffer pivot point and a second fixed pivot point are provided on the second pivot portion; the first connecting rod has a first rod body, and a first connecting rod pivot portion provided on the first rod body, and the first connecting rod pivot portion is pivotally connected to the first fixed pivot point at one end adjacent to the first rod body, and is recessed on the first rod body. The cam is secured to the chassis and has a first end secured thereto, the second end of the chassis being secured to the chassis by a spring which is secured to a first end of the chassis and a second end of the chassis having a first end secured thereto. Simple diagram description

[0006] FIG1 is a perspective exploded schematic diagram of the present invention.

[0007] FIG2 is a schematic diagram of a three-dimensional assembly of the present invention.

[0008] FIG3 is an exploded perspective view of the second connecting rod, the buffer rod and the support rod of the present invention.

[0009] FIG4 is a cross-sectional view of the present invention in a folded state.

[0010] FIG5 is a cross-sectional view of the fully open state of the present invention.

[0011] FIG6 is a cross-sectional view of the present invention in a half-open state.

[0012] FIG7 is a cross-sectional view of another embodiment of the present invention in a folded state. Implementation Method

[0013] To help you, the Review Committee, further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are provided for reference and illustration only and are not intended to limit the present invention.

[0014] Please refer to Figures 1 and 2, which are respectively exploded and assembled perspective views of the present invention. The present invention provides a door hinge device that can be used in, for example, refrigerators or cold storages to pivotally connect doors. The door hinge device includes a first hinge 1, a second hinge 2, a first connecting rod 3, a second connecting rod 4, a third connecting rod 5, an elastic pressure rod 6, a buffer rod 7, and a support rod 8. The following table contains the key information:

[0015] The first hinge 1 has a first fixing portion 10 and a first pivot portion 11 provided on the first fixing portion 10. The first fixing portion 10 allows the first hinge 1 to be fixed to a cabinet such as a refrigerator or a cold storage (not shown). The first pivot portion 11 is provided with a first fixing pivot point 110 and a first supporting pivot point 111 for pivotally connecting to the first connecting rod 3 and the support rod 8, respectively.

[0016] The second hinge 2 comprises a second fixing portion 20, a second pivoting portion 21 mounted on the second fixing portion 20, and a buffer member 22. The second fixing portion 20 allows the second hinge 2 to be fixed to a door of a refrigerator or cold storage (not shown), thereby enabling the door to be opened and closed relative to the cabinet. The second pivoting portion 21 is provided with a buffer pivot point 210 and a second fixed pivot point 211. The buffer pivot point 210 connects the buffer member 22 at a fixed point 220, thereby securing the buffer member 22 to the second hinge 2. The buffer pivot point 210 and the second fixed pivot point 211 are pivotally connected to the second connecting rod 4 and the third connecting rod 5, respectively.

[0017] The first link 3 comprises a first rod body 30 and a first link pivot 31 disposed on the first rod body 30. The first link pivot 31 is provided with a first link pivot point 310 and a second link pivot point 311 at two ends adjacent to the first rod body 30, respectively. A push-on pivot point 312 is provided on the first link pivot 31 between the first link pivot point 310 and the second link pivot point 311. The first link pivot point 310 is pivotally connected to the first fixed pivot point 110 via a pivot shaft, such as a pivot axis, to enable the first link 3 to swing relative to the first hinge 1 and to be superimposed on the first hinge 1. Furthermore, the first rod body 30 is recessed with a first accommodating space 32 adjacent to the first link pivot point 310 to accommodate the elastic pressure rod 6.

[0018] Please refer to Figure 3. The second link 4 has a second rod body 40 and a second link pivot 41 provided on the second rod body 40. The second link pivot 41 is respectively provided with a link third pivot point 410 and a link fourth pivot point 411 at two ends adjacent to the second rod body 40, and a second support pivot point 412 is provided on the second link pivot 41 between the link third pivot point 410 and the link fourth pivot point 411. The link third pivot point 410 is pivotally connected to the link second pivot point 311 of the above-mentioned first link 3 through a pivot, and the link fourth pivot point 411 is pivotally connected to the buffer pivot point 210 of the above-mentioned second hinge seat 2 through a pivot, so that the second link 4 can swing between the first link 3 and the second hinge seat 2 accordingly. In addition, the second connecting rod 4 is recessed with a second accommodating space 42 adjacent to the fourth pivot point 411 of the connecting rod, so that the buffer rod 7 can be disposed in the second accommodating space 42 .

[0019] Referring again to FIG. 1 , the third link 5 comprises a third rod 50 and a push member 51 disposed on the third rod 50. The third rod 50 can be formed from two pieces spaced apart and integrally formed by stamping a plate between the two pieces, or a separate element (not shown) can be provided to connect the two pieces to maintain the spacing, thereby forming a passable space 500 on the third rod 50. Furthermore, a fifth link pivot point 501 and a sixth link pivot point 502 are respectively provided at each end of the third link 50. The fifth link pivot point 501 is pivotally connected to the push pivot point 312 of the first link 3 via a pivot shaft, while the sixth link pivot point 502 is pivotally connected to the second fixed pivot point 211 of the second hinge seat 2 via a pivot shaft, thereby forming a four-bar linkage mechanism with the second hinge seat 2, the first link 3, and the second link 4. The pushing member 51 can be connected to the fifth pivot point 501 of the connecting rod through a pushing pivot point 510 .

[0020] Referring to Figures 1 and 4 , the elastic pressure rod 6 is disposed within the first accommodating space 32 of the first connecting rod 3 and may be provided with a pressing surface 320 within the first accommodating space 32. The elastic pressure rod 6 may include a pressure rod 60, a pulley 61 disposed on the pressure rod 60, and an elastic element 62 that provides the pressure rod 60 with an elastic restoring force when compressed. The pressure rod 60 may include a pulley seat 600 and a rod portion 601 connected to the pulley seat 600. The pulley 61 has a shaft portion 610 pivotally mounted on the pulley seat 600. The rod portion 601 may pass through the elastic element 62, allowing the elastic element 62 to abut between the pulley seat 600 and the pressing surface 320. As shown in FIG4 , the push member 51 of the third link 5 is in sliding contact with the pulley 61. The push member 51 is provided with a first cam surface 511. The first cam surface 511 has a first abutting edge 511a, a first sliding surface 511b extending along the first abutting edge 511a, and a first critical edge 511c located between the first abutting edge 511a and the first sliding surface 511b. When the second hinge 2 is retracted onto the first hinge 1, the elastic pressure rod 6 pushes the pulley 61 into the first abutting edge 511a by the elastic force of the elastic element 62.

[0021] Referring to Figures 1 and 3 , the buffer rod 7 can be a hydraulic or pneumatic push rod, positioned within the second accommodating space 42 of the second connecting rod 4 and abutting against the buffer member 22 of the second hinge 2. The buffer rod 7 can include a buffer body 70 and a buffer seat 71 for receiving the buffer body 70. The buffer seat 71 has a mounting portion 710 and an assembly portion 711. The mounting portion 710 receives the buffer body 70, while the assembly portion 711 is assembled with the second connecting rod 4 to position the buffer body 70 within the second accommodating space 42. The buffer body 70 includes a pressure-bearing portion 700 and a telescopic rod 701. When the pressure-bearing portion 700 is compressed, the telescopic rod 701 is compressed inward and can be restored by hydraulic or pneumatic pressure. Furthermore, the buffer body 70 can be covered with a protective sleeve 72. The protective sleeve 72 includes a sleeve portion 720 for the pressure-bearing portion 700 of the buffer body 70 to fit within. The protective sleeve 72 also has a pressure-bearing surface 721 at its front end, replacing the pressure-bearing portion 700 of the buffer body 70 in frictional contact with the buffer member 22. As shown in FIG4 , the buffer member 22 has a second cam surface 221. This second cam surface 221 includes a second abutting edge 221a, a second sliding surface 221b extending from the second abutting edge 221a, and a second critical edge 221c connecting the second sliding surface 221b. When the second hinge seat 2 is retracted onto the first hinge seat 1, the buffer rod 7 abuts against the second abutting edge 221a, receiving pressure.

[0022] 1 , 3 and 4 , the support rod 8 is pivotally connected between the first support pivot point 111 and the second support pivot point 412 via the third connecting rod 5 . Specifically, the support rod 8 may have a support rod body 80, and a first pivot end 81 and a second pivot end 82 connected to the two ends of the support rod body 80, wherein the first pivot end 81 is pivoted at the first support pivot point 111, and the second pivot end 82 is pivoted at the second support pivot point 412, and the support rod body 80 may have a first support section 800, a second support section 801, and a third support section 802 connected between the first support section 800 and the second support section 801, and a first inflection portion 802a is formed between the first support section 800 and the third support section 802, and a second inflection portion 802b is formed between the second support section 801 and the third support section 802, and the inflection directions of the first inflection portion 802a and the second inflection portion 802b are opposite, so as to improve the supporting strength of the support rod 8 through the inflection structure.

[0023] Therefore, the door hinge device of the present invention can be obtained by the above-mentioned structural composition.

[0024] Accordingly, as shown in FIG5 , when the refrigerator or cold storage door is opened, the first connecting rod 3 flips outward, causing the second hinge 2 to open with the door to a certain opening angle. The buffer member 22 of the second hinge 2 is pushed by the buffer rod 7 to stop the door at the aforementioned opening angle. Simultaneously, the push member 51 of the third connecting rod 5 compresses the elastic pressure rod 6, allowing the support rod 8 to be supported between the first hinge 1 and the second connecting rod 4 via the third connecting rod 5, providing sufficient supporting force. Conversely, as shown in FIG6 , when the refrigerator or cold storage door is closing, the elastic pressure rod 6 abuts against the first cam surface 511, exerting force, causing the elastic pressure rod 6 to push its pulley 61 into contact with the first cam surface 511, thereby achieving the effect of opening and stopping and automatically closing. Furthermore, the buffer rod 7 contacts the second cam surface 221, providing a certain resistance to prevent the door from directly impacting the cabinet body, thereby preventing the door from instantly colliding when closing. Therefore, the present invention provides sufficient supporting force when cooperating with the support rod to provide actuation, and can better exert the above-mentioned functions of the elastic pressure rod 6 and the buffer rod 7.

[0025] Furthermore, as shown in FIG7 , in another embodiment of the present invention, a first limiting structure 33 may be provided to abut against the front end of the pressure rod 60, and a second limiting structure 34 may be provided to prevent the elastic element 62 from falling out of the first accommodating space 32 , thereby further increasing the stability of the elastic pressure rod 6 in operation.

[0026] In summary, the present invention can indeed achieve the intended purpose described in the aforementioned specification and resolve the deficiencies of the prior art. Furthermore, due to its novelty and progressiveness, it fully meets the requirements for an invention patent application. Therefore, an application is filed in accordance with the Patent Law. We respectfully request that this patent be carefully examined and approved to protect the rights of the inventor.

[0027] However, the above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Therefore, all equivalent technologies, means, etc. made by using the contents of the present invention specification and drawings are also included in the scope of the present invention and are hereby stated.

[0028] 1: First hinge seat 10: First fixing part 11: First pivot part 110: First fixed pivot point 111: First support pivot point 2: Second hinge seat 20: Second fixing part 21: Second pivot part 210: Buffer pivot point 211: Second fixed pivot point 22: Buffer 220: Fixed point 221: Second cam surface 221a: Second abutting edge 221b: Second sliding surface 221c: Second critical edge 3: First connecting rod 30: First rod 31: First connecting rod pivot 310: connecting rod first pivot point 311: Second pivot point of connecting rod 312: Push to the pivot point 32: First accommodation space 320: pressure surface 33: First limiting structure 34: Second limiting structure 4: Second connecting rod 40: Second rod 41: Second connecting rod pivot 410: Connecting rod third pivot point 411: Connecting rod fourth pivot point 412: Second support pivot point 42: Second storage space 5: Third connecting rod 50: The third rod 500: Passable space 501: Fifth pivot point of connecting rod 502: Sixth connecting rod pivot point 51: Push piece 510: Push to the pivot point 511: first cam surface 511a: first abutting edge 511b: first sliding surface 511c: First critical edge 6: Elastic pressure rod 60: Pressure rod 600:Pulley seat 601: Rod 61: Pulley 610: shaft 62: Elastic element 7: Buffer rod 70: Buffer body 700: Pressure part 701: Telescopic rod 71: Buffer seat 710: Installation 711: Assembly Department 72: Protective case 720: Set 721: Pressure surface 8: Support rod 80: Support rod 800: First support section 801: Second support section 802: The third support segment 802a: first folded portion 802b: second folded portion 81: first pivot end 82: Second pivot end

Claims

1. A door hinge device, comprising: a first hinge seat having a first fixed portion and a first pivot portion provided on the first fixed portion, wherein the first pivot portion is provided with a first fixed pivot point and a first support pivot point; a second hinge seat having a second fixed portion, a second pivot portion provided on the second fixed portion, and a buffer member provided on the second hinge seat, wherein the second pivot portion is provided with a buffer pivot point and a second fixed pivot point; a first connecting rod having a first rod body and a first connecting rod pivot portion provided on the first rod body, wherein the first connecting rod pivot portion is pivotally connected to the first fixed pivot point at one end adjacent to the first rod body, and a first accommodating space is recessed in the first rod body; and a second link pivot portion provided on the second link body, and the second link pivot portion is pivotally connected to the other end of the first link body at one end adjacent to the second link body, and the other end of the second link body is pivotally connected to the buffer pivot point, and a second accommodating space is recessed on the second link body, and a second support pivot point is provided on the second link pivot portion; a third link, comprising a third link body and a push-pull member provided on the third link body, the two ends of the third link body are respectively connected between the second hinge seat and the first link, and form a four-bar linkage with the second link; an elastic pressure rod is provided in the first accommodating space and has a pulley that slides in contact with the push-pull member; a buffer rod is provided in the second accommodating space and abuts against the buffer member; and a support rod is pivotally connected between the first support pivot point and the second support pivot point through the third link.

2. The door hinge device according to claim 1, wherein a pressing surface is provided in the first accommodating space, and the elastic pressure rod abuts against the pressing surface.

3. The door hinge device as described in claim 1, wherein the third rod system is composed of two plates arranged at a distance from each other to form a passable space on the third rod body and allow the support rod to pass through the passable space through the third connecting rod.

4. The door hinge device as described in claim 3, wherein the two pieces are integrally formed by plate stamping, or other components are connected between the two pieces to maintain the spacing configuration.

5. A door hinge device as described in claim 1, wherein the elastic pressure rod further includes a pressure rod and an elastic element that provides the pressure rod with elastic restoring force after being compressed, and the pressure rod has a pulley seat and a rod connected to the pulley seat, the rod passes through the elastic element, and the pulley is pivotally mounted on the pulley seat.

6. The door hinge device as described in claim 1, wherein the push member is provided with a first cam surface, the first cam surface having a first abutting edge, a first sliding surface extending along the first abutting edge, and a first critical edge located between the first abutting edge and the first sliding surface.

7. A door hinge device as described in claim 1, wherein the buffer rod has a buffer body and a buffer seat for the buffer body to be set, the buffer seat has a mounting portion and an assembly portion, the mounting portion is for the buffer body to be set therein, and the assembly portion is assembled on the second connecting rod so that the buffer body is located in the second accommodating space.

8. The door hinge device as described in claim 7, wherein a protective sleeve is provided on the outside of the buffer body, the protective sleeve has a sleeve portion for the buffer body to be inserted therein, and the front end of the protective sleeve also has a pressure surface to support the buffer member.

9. The door hinge device as described in claim 1, wherein the buffer member has a second cam surface, the second cam surface has a second abutting edge, a second sliding surface extending along the second abutting edge, and a second critical edge connected to the second sliding surface.

10. A door hinge device as described in claim 1, wherein the support rod system has a support rod body, and the support rod body has a first support segment, a second support segment, and a third support segment connected between the first support segment and the second support segment, and a first inflection portion is formed between the first support segment and the third support segment, and a second inflection portion is formed between the second support segment and the third support segment, and the inflection directions of the first inflection portion and the second inflection portion are opposite.

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