Door lock assembly for micro-pressure oxygen bin

Abstract

The door lock assembly for the micro-pressure oxygen bin comprises a rotating shaft, an outer lock body, an inner lock body and an inverted-L-shaped buckle, and the rotating shaft penetrates through the center of the outer lock body and the center of the inner lock body and penetrates out of the two ends of the outer lock body and the two ends of the inner lock body; a first sealing piece is arranged on the inner side of the outer lock body, and a second sealing piece is arranged between the rotating shaft and the outer lock body; an outer handle and an inner handle are fixed to the two ends of the rotating shaft correspondingly, and fan-shaped clamping heads are integrally arranged on the opposite sides of the outer handle. The fan-shaped clamping head is screwed into the locking face of the inverted-L-shaped buckle, and the locking face gradually inclines towards the rear side from the bottom to the top. The door lock designed by the utility model can complete the pre-tightening step, so that manual pre-tightening is not needed in the early stage of pressure reduction, the door is closed and the outer handle is rotated during pressure reduction, the rotating shaft drives the fan-shaped clamping head to rotate at the moment, the fan-shaped clamping head is screwed into the locking surface of the inverted L-shaped buckle from bottom to top, and the locking surface gradually inclines towards the rear side from bottom to top; when the fan-shaped clamping head rotates upwards, the fan-shaped clamping head is pushed backwards, and meanwhile the door plate is driven to press the door frame to complete pre-tightening.

Description

Technical Field

[0001] The utility model relates to a door lock, in particular to a door lock assembly for a micro-pressure oxygen chamber. Background Art

[0002] Existing micro-pressure oxygen chambers are divided into negative-pressure type and positive-pressure chambers. For the oxygen chamber of the negative-pressure type, during the initial stage of decompression, people need to manually hold the sealing door to press the sealing strip on the door frame, so that the door panel presses the sealing strip on the door frame. After the internal pressure is reduced to a certain extent and the self-suction closing is completed, it can be released. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a door lock assembly for a micro-pressure oxygen chamber to solve the technical problems in the background art.

[0004] The technical solution of the utility model is as follows:

[0005] A door lock assembly for a micro-pressure oxygen chamber includes a rotating shaft, an outer lock body, an inner lock body and an inverted L-shaped buckle. The rotating shaft passes through the centers of the outer lock body and the inner lock body and extends out from both ends. A first sealing member is provided inside the outer lock body, and a second sealing member is provided between the rotating shaft and the outer lock body. Outer handles and inner handles are respectively fixed at both ends of the rotating shaft, and a sector-shaped clamping head is integrally provided on the opposite side of the outer handle. The sector-shaped clamping head is screwed into the locking surface of the inverted L-shaped buckle, and the locking surface gradually inclines backward from bottom to top.

[0006] Further, the outer lock body is successively composed of a sealing section, a bushing A and a flange A. The inner diameter of the sealing section matches the diameter of the rotating shaft. Two annular grooves are spaced apart on the part of the rotating shaft located in the sealing section, and rubber rings are installed in the annular grooves as the second sealing member. A sealing gasket is provided inside the flange A as the first sealing member, and a bearing A is installed inside the bushing A to support and fix the rotating shaft.

[0007] Further, the inner lock body is composed of a bushing B and a flange B, and a bearing B is installed inside the bushing B to support and fix the rotating shaft.

[0008] Further, a third sealing member is also installed on the rotating shaft inside the bearing A.

[0009] Further, both the bearing A and the bearing B adopt tapered roller bearings.

[0010] The beneficial effects of the utility model are as follows:

[0011] The door lock designed by the utility model can complete the pre-tightening step, so that manual pre-tightening is not required in the early stage of decompression. When closing the door during decompression, rotate the outer handle. At this time, the rotating shaft drives the sector-shaped clamping head to rotate. The sector-shaped clamping head is screwed into the locking surface of the inverted L-shaped buckle from bottom to top, and the locking surface gradually inclines backward from bottom to top. When the sector-shaped clamping head rotates upward, it will push it backward, and at the same time drive the door panel to press against the door frame to complete the pre-tightening. Brief Description of the Drawings

[0012] Figure 1 It is a schematic cross-sectional structure diagram of the present utility model;

[0013] Figure 2 It is a schematic three-dimensional structure diagram of the present utility model Figure 1 ;

[0014] Figure 3 It is a schematic three-dimensional structure diagram of the present utility model Figure 2 ;

[0015] Figure 4 It is a side view of the present utility model.

[0016] In the figure: 1 - outer lock body, 11 - sealing section, 12 - ferrule A, 13 - flange A, 14 - bearing A, 15 - first seal, 16 - second seal, 17 - third seal, 2 - inner lock body, 21 - ferrule B, 22 - flange B, 23 - bearing B, 3 - rotating shaft, 4 - outer handle, 5 - inner handle, 6 - sector-shaped chuck, 7 - inverted L-shaped buckle, 71 - locking surface. Detailed Description of the Preferred Embodiments

[0017] The following further describes the detailed embodiments of the present utility model in conjunction with the accompanying drawings. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] As Figures 1-4 shown:

[0019] A door lock assembly for a micro-pressure oxygen chamber includes a rotating shaft 3, an outer lock body 1, an inner lock body 2, and an inverted L-shaped buckle 7. The rotating shaft 3 passes through the centers of the outer lock body 1 and the inner lock body 2 and extends out from both ends. The inner side of the outer lock body 1 has a first seal 15, and a second seal 16 is provided between the rotating shaft 3 and the outer lock body 1. The two ends of the rotating shaft 3 are respectively fixed with an outer handle 4 and an inner handle 5, and a sector-shaped chuck 6 is integrally provided on the opposite side of the outer handle 4. The sector-shaped chuck 6 is screwed into the locking surface 71 of the inverted L-shaped buckle 7, and the locking surface 71 gradually slopes backward from the bottom upwards.

[0020] The present utility model is specially designed for a negative-pressure type micro-pressure chamber. Currently, before decompression of the micro-pressure chamber, it is necessary to manually hold the sealing door to press the sealing strip on the door frame, and then release it after the internal pressure is reduced to a certain extent and the self-suction closing is completed.

[0021] The door lock designed by the utility model can complete the pre-tightening step, so that manual pre-tightening is not required in the early stage of pressure reduction. To ensure airtightness, a first seal 15 is provided inside the outer lock body 1. The function of the first seal 15 is to seal the outer lock body 1 and the door panel. A second seal 16 is provided between the rotating shaft 3 and the outer lock body 1, and the second seal 16 seals the gap between the rotating shaft 3 and the outer lock body 1.

[0022] Specifically, when reducing pressure, close the door and rotate the outer handle 4. At this time, the rotating shaft 3 drives the sector-shaped chuck 6 to rotate. The sector-shaped chuck 6 screws into the locking surface 71 of the inverted L-shaped buckle 7 from bottom to top. The locking surface 71 gradually slopes backward from the bottom upward. When the sector-shaped chuck 6 rotates upward, it will push it backward, and at the same time drive the door panel to press against the door frame to complete pre-tightening.

[0023] As an optimized solution, the outer lock body 1 is successively composed of a sealing section 11, a bushing A 12, and a flange A 13. The inner diameter of the sealing section 11 matches the diameter of the rotating shaft 3. Two annular grooves are spaced apart on the part of the rotating shaft 3 located in the sealing section 11. Rubber rings are installed in the annular grooves as the second seal 16. A sealing gasket is provided inside the flange A 13 as the first seal 15. A bearing A 14 is installed inside the bushing A 12 to support and fix the rotating shaft 3. The inner lock body 2 is composed of a bushing B 21 and a flange B 22. A bearing B 23 is installed inside the bushing B 21 to support and fix the rotating shaft 3.

[0024] The sealing section 11 is mainly used to seal the air gap between the rotating shaft 3 and the outer lock body 1. It is sealed by rubber rings. When installing, a round hole for the rotating shaft 3 to pass through is opened on the sealing door, and corresponding receiving grooves are opened at both ends of the round hole according to the protruding depths of the bearing A 14 and the bearing B 23. Then, the flange A 13 and the flange B 22 are fixed by bolts.

[0025] Although there is the sealing section 11 and the second seal 16 to achieve the sealing between the rotating shaft 3 and the outer lock body 1, a third seal 17 can also be installed on the rotating shaft 3 inside the bearing A 14. In this way, an additional seal can be added to improve reliability.

[0026] Since the rotating shaft 3 needs to bear axial force in the early stage of pre-tightening, it is recommended that both the bearing A 14 and the bearing B 23 adopt tapered roller bearings.

[0027] The above has described the embodiments of the utility model in detail in conjunction with the accompanying drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the utility model.

Claims

1. A door lock assembly for a micro-pressure oxygen chamber, characterized in that: It includes a rotating shaft, an outer lock body, an inner lock body and an inverted L-shaped buckle, the rotating shaft passes through the center of the outer lock body and the inner lock body, and passes out from both ends; the inner side of the outer lock body is provided with a first sealing member, and a second sealing member is provided between the rotating shaft and the outer lock body; the two ends of the rotating shaft are respectively fixed with an outer handle and an inner handle, and the opposite side of the outer handle is integrally provided with a fan-shaped clamping head; the fan-shaped clamping head is screwed into the locking surface of the inverted L-shaped buckle, and the locking surface gradually tilts from the bottom upward to the rear side.

2. The door lock assembly for a micro-pressure oxygen chamber according to claim 1, characterized in that: The outer lock body is composed of a sealing section, a ferrule A and a flange A in sequence. The inner diameter of the sealing section matches the diameter of the rotating shaft. Two annular grooves are arranged at intervals in the part of the rotating shaft located in the sealing section. A rubber ring is installed in the annular groove as a second seal. A sealing gasket is arranged on the inner side of the flange A as a first seal. A bearing A is installed in the ferrule A to support and fix the rotating shaft.

3. The door lock assembly for a micro-pressure oxygen chamber according to claim 2, characterized in that: The inner lock body is composed of a ferrule B and a flange B, and a bearing B is installed in the ferrule B to support and fix the rotating shaft.

4. The door lock assembly for a micro-pressure oxygen chamber according to claim 2, characterized in that: A third sealing member is also installed on the inner side of the bearing A on the rotating shaft.

5. The door lock assembly for a micro-pressure oxygen chamber according to claim 3, characterized in that: The bearing A and the bearing B are both tapered roller bearings.

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