Portable oxygen supply device

By setting up wire retracting components and tie rod components in the oxygen supply machine, the problem of scattered air pipes and wires of the portable oxygen supply machine is solved, making convenient movement and improved use safety.

CN223292301UActive Publication Date: 2025-09-02JIANGSU JINPENG AEROSPACE INTELLIGENT EQUIP CO LTD
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Patent Information

Application Number
CN202422101213.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-29
Publication Date
2025-09-02
Estimated Expiration
2034-08-29

AI Technical Summary

Technical Problem

The air pipes and wires of existing portable oxygen supply machines are easily distracted when they move, which affects the convenience and safety of use.

Method used

The wire retracting assembly and tie rod assembly are arranged in the oxygen supply machine body. The air pipe and the wire are stored on the wire retracting assembly. The self-locking roller and the support foot are easy to move. The tie rod assembly can be adjusted in height for easy handling. The movable lock and the door panel assembly cooperate to achieve the sealing of the trachea, and the limiting mechanism fixes the tie rod position.

Benefits of technology

It realizes convenient storage of air pipes and wires, improves the portability and safety of the oxygen supply machine, reduces external pollution, and simplifies the movement process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of oxygen supply devices, and discloses a portable oxygen supply device which comprises an oxygen supply machine body, an air pipe and an electric wire, the bottom of the oxygen supply machine body is provided with a plurality of self-locking idler wheels and a plurality of supporting feet, and the self-locking idler wheels and the supporting feet are arranged on the two sides of the oxygen supply machine body respectively. A pull rod assembly is arranged on the side, provided with the self-locking roller, of the oxygen supply machine body, two take-up assemblies are installed in the oxygen supply machine body, the air pipe and the electric wire are wound around the two take-up assemblies respectively, the take-up assemblies are covered with a door plate assembly, and a movable lock is installed on the oxygen supply machine body. The device solves the problem that an air pipe and an electric wire are inconvenient to move when being scattered, the air pipe and the electric wire can be wound, and the device is convenient to carry about.
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Description

Technical Field

[0001] The utility model relates to the technical field of oxygen supply devices, and more particularly to an oxygen supply device which is easy to carry around. Background Art

[0002] Home oxygen concentrators are generally lightweight, easy to use and move, thus meeting the user's requirements for use at any time in various scenarios.

[0003] Chinese utility model patent application number 202320604042.0 discloses a portable household oxygen concentrator with a retractable hook on the back of the body for easy hanging on different home decorations. However, the air pipe and wires of the oxygen concentrator are long and need to be manually arranged when moving to avoid damage, which reduces the convenience of use. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an oxygen supply device that is easy to carry around.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An oxygen supply device that is easy to carry around includes an oxygen supply machine body, an air pipe and an electric wire. A plurality of self-locking rollers and a plurality of supporting legs are installed at the bottom of the oxygen supply machine body, and the plurality of self-locking rollers and the plurality of supporting legs are arranged on both sides of the oxygen supply machine body. A pull rod assembly is provided on the side of the oxygen supply machine body where the self-locking roller is installed. Two wire-reeling assemblies are installed in the oxygen supply machine body, and the air pipe and the electric wire are respectively wound on the two wire-reeling assemblies. The outer cover of the wire-reeling assembly is provided with a door panel assembly. A movable lock is installed on the oxygen supply machine body, and the movable lock is locked with the door panel assembly.

[0007] The present invention is further configured as follows: the wire-winding assembly includes a reel, the reel is used for winding, a friction sleeve is fixed on the oxygen supply machine body, the reel is rotatably connected to the oxygen supply machine body and the friction sleeve, one end of the reel points to the outside of the oxygen supply machine body, the end of the reel pointing to the outside of the oxygen supply machine body is provided with a second slide groove, a connector is slidably connected in the second slide groove, the end of the connector facing away from the reel can extend out of the second slide groove, a transfer rod is rotatably connected to the connector head, the transfer rod can be slidably connected to the second slide groove, and a handle is provided at the end of the transfer rod facing away from the connector head.

[0008] The present invention is further configured as follows: two receiving grooves 1 are provided on the oxygen supply machine body, the two receiving grooves 1 correspond to the two wire-receiving assemblies, a magnet is provided at the bottom of the receiving groove 1, when the transfer rod is pushed into the sliding groove 2, the handle can be stored in the receiving groove 1, the handle can be attracted to the magnet, and a groove is provided on the side of the handle facing the connecting head, and the user pulls the handle to separate from the magnet through the groove.

[0009] The utility model is further configured as follows: a second storage groove is provided on the door panel assembly, the second storage groove is used to store the plug of the electrical wire, a through hole is provided on the second storage groove and the door panel assembly respectively, the two through holes can pass through the air pipe and the electrical wire respectively, and a movable baffle is provided on the through hole through which the air pipe is passed.

[0010] The utility model is further configured as follows: the movable baffle includes a slide rail, the slide rail is fixed on the door panel assembly, a baffle is slidably connected inside the slide rail, the baffle can cover the through hole through which the air pipe is passed, a spring three is connected to the baffle, the spring three is arranged along the direction of the slide rail, and the spring three is fixed on the door panel assembly.

[0011] The present invention is further configured as follows: the pull rod assembly includes a slide groove 1, the slide groove 1 is opened on the back side of the oxygen supply machine body along the vertical direction, the slide groove 1 is slidably connected with a pull rod 1, the pull rod 1 is a hollow rod, the pull rod 2 is slidably connected with the pull rod 1, the slide groove 1 and the pull rod 1 are both provided with a card slot, the pull rod 1 and the pull rod 2 are both installed with a limiting mechanism, the limiting mechanism can be respectively engaged with the corresponding card slot, the top of the pull rod 2 is connected with a handshake, the handshake is slidably connected with a button, a spring 1 is arranged between the button and the handshake, the bottom of the button is connected with a push rod 2, the bottom of the pull rod 2 is connected with a push rod 1, the push rod 1 and the push rod 2 can respectively push the corresponding limiting mechanism to unlock.

[0012] The present invention is further configured as follows: the limiting mechanism includes a connecting rod, one end of the connecting rod is provided with a blocking block, the blocking block can be engaged with the blocking slot, the other end of the connecting rod is sleeved with spring 2, the outer side of spring 2 is sleeved with a guide sleeve, the guide sleeve is correspondingly fixed in pull rod 1 and pull rod 2, the end of the connecting rod facing the blocking slot is provided with a wedge-shaped groove, the push rod 1 and push rod 2 are correspondingly provided with wedge-shaped blocks, and the push rod 1 and push rod 2 can both push the connecting rod to move to the side of the guide sleeve.

[0013] The advantages of the utility model are:

[0014] 1. A wire reel assembly is provided inside the oxygen supply machine. Before moving, the transfer rod is moved out of the second slide slot by the handle, and the connector is moved out of the second slide slot at the same time. The transfer rod is rotated to a suitable angle and the reel can be easily rotated by the handle to reel in the air tube and wire, making it easier to move the oxygen supply machine later.

[0015] 2. After the trachea is rolled up, it passes through the door panel assembly through the through hole. The movable baffle loses its support. Under the action of spring 3, the baffle moves to cover the through hole, thereby making the trachea opening in a relatively closed environment, reducing pollution from the external environment and improving safety in subsequent use.

[0016] 3. A pull rod assembly is installed in the oxygen supply machine body. The pull rod assembly consists of several pull rods that can be slidably connected to each other. The pull rods can be fixed by limiting mechanisms and card slots. When it needs to be moved, the pull rod assembly can be opened so that the handle of the pull rod assembly moves to a height suitable for the user to pull, and cooperates with the self-locking rollers at the bottom, so it can be easily moved without carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 For the Figure 1 The AA line cross-section shown;

[0019] Figure 3 for Figure 2 An enlarged view of part E is shown;

[0020] Figure 4 for Figure 1 An enlarged view of part B is shown;

[0021] Figure 5 For the Figure 1 The CC line cross-section shown;

[0022] Figure 6 For the Figure 1 The DD line cross-section is shown;

[0023] In the figure: 1. Oxygen supply machine body; 11. Storage slot 1; 2. Self-locking roller; 3. Support foot; 4. Pull rod assembly; 41. Slide slot 1; 42. Pull rod 1; 43. Pull rod 2; 431. Push rod 1; 44. Handshake; 45. Button; 451. Push rod 2; 46. Spring 1; 47. Limiting mechanism; 471. Connecting rod; 472. Block; 473. Spring 2; 474. Guide sleeve; 5. Door panel assembly; 51. Storage slot 2; 52. Through hole; 53. Movable baffle; 531. Slide rail; 532. Baffle; 533. Spring 3; 6. Movable lock; 7. Wire take-up assembly; 71. Reel; 72. Slide slot 2; 73. Friction sleeve; 74. Connector; 75. Adapter rod; 751. Handle; 752. Groove; 76. Magnet; 8. Air pipe; 9. Electric wire. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0026] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually relative to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned direction words are not used to limit the present invention.

[0027] See also Figure 1-6 , the utility model provides the following technical solutions:

[0028] The portable oxygen supply device comprises an oxygen supply machine body 1, an air pipe 8 and an electric wire 9. A plurality of self-locking rollers 2 and a plurality of supporting legs 3 are installed at the bottom of the oxygen supply machine body 1. The plurality of self-locking rollers 2 and the plurality of supporting legs 3 are respectively arranged on both sides of the oxygen supply machine body 1. A pull rod assembly 4 is provided on one side of the oxygen supply machine body 1 on which the self-locking roller 2 is installed. The pull rod assembly 4 can be pulled out of the oxygen supply machine body 1 and can be adjusted to a height suitable for the user to pull. The user pulls the pull rod assembly 4 to move the oxygen supply machine body 1 through the self-locking roller 2. No manual carrying is required, the operation is convenient, and the movement of the oxygen supply machine is convenient. When the oxygen supply machine is moved into place, the self-locking roller 2 is locked, and the oxygen supply machine can be fixed to the ground together with the plurality of supporting legs 3 on the other side.

[0029] Two wire reel assemblies 7 are installed in the oxygen supply machine body 1. The air tube 8 and the electric wire 9 are respectively reeled in the two wire reel assemblies 7. Before moving, the air tube 8 and the electric wire 9 are reeled in by the wire reel assemblies 7, thereby avoiding being scattered and interfering with the user's movement, thereby improving portability.

[0030] The outer cover of the take-up assembly 7 is provided with a door panel assembly 5, and a movable lock 6 is installed on the oxygen supply machine body 1. The movable lock 6 is locked with the door panel assembly 5. The door panel assembly 5 places the trachea 8 in a relatively sealed environment, reducing the pollution of the external environment to the inside of the trachea 8 and improving the safety during subsequent use.

[0031] The wire take-up assembly 7 includes a reel 71, which is used for rewinding. A friction sleeve 73 is fixed to the oxygen supply machine body 1. The reel 71 is rotatably connected to the oxygen supply machine body 1 and the friction sleeve 73. The reel 71 is not easy to rotate on its own under the action of the friction force of the friction sleeve 73, thereby ensuring the stability of rewinding and unrewinding. One end of the reel 71 points to the outside of the oxygen supply machine body 1, and the end of the reel 71 pointing to the outside of the oxygen supply machine body 1 is provided with a second slide groove 72, and a connector 74 is slidably connected in the second slide groove 72. The second slide groove 72 is simultaneously engaged with the connector 74, that is, the connector 74 can slide along the second slide groove 72, and when the chain structure 74 rotates, it can drive the second slide groove 72 to rotate synchronously, that is, drive the reel 71 to rotate synchronously to achieve rewinding and unrewinding.

[0032] The end of the connector 74 facing away from the reel 71 can extend out of the second slide groove 72. A transfer rod 75 is rotatably connected to the connector 74. The transfer rod 75 can be slidably connected to the second slide groove 72. When the connector 75 is pushed inward into the second slide groove 72, the reel is retracted, reducing the exposed structural area, preventing interference to the user, and preventing accidental contact with the transfer rod 75 that may cause abnormal reeling and unreeling.

[0033] A handle 751 is provided at the end of the adapter rod 75 facing away from the connector 74, which is convenient for the user to hold, thereby facilitating the operation of the wire-winding assembly 7; two storage grooves 11 are provided on the oxygen supply machine body 1, and the two storage grooves 11 correspond to the two wire-winding assemblies 7. A magnet 76 is provided at the bottom of the storage groove 11. When the adapter rod 75 is pushed into the slide groove 2 72, the handle 751 can be stored in the storage groove 11, and the handle 751 can be attracted by the magnet 76, thereby ensuring that the adapter rod 75 will not fall out during the movement of the oxygen supply machine. A groove 752 is provided on the side of the handle 751 facing the connector 74, and the user pulls the handle 751 to separate it from the magnet 76 through the groove 752.

[0034] The door panel assembly 5 is provided with a second storage groove 51 for receiving the plug of the electric wire 9. The second storage groove 51 and the door panel assembly 5 are each provided with a through hole 52. The two through holes 52 can pass through the air pipe 8 and the electric wire 9 respectively. After the electric wire 9 is wound up, the plug is stuck in the second storage groove 51, which can prevent dust from entering the interior of the take-up assembly 7 from the corresponding through hole 52. A movable baffle 53 is provided on the through hole 52 through which the air pipe 8 is passed. After the air pipe 8 is wound up and enters the interior through the door panel assembly 5, the movable baffle 53 automatically covers the corresponding through hole 52, thereby preventing dust from entering and ensuring that the air pipe 8 is clean during movement.

[0035] The movable baffle 53 includes a slide rail 531, which is fixed on the door panel assembly 5. A baffle 532 is slidably connected inside the slide rail 531. The baffle 532 can cover the through hole 52 through which the trachea 8 is passed. A spring three 533 is connected to the baffle 532. The spring three 533 is arranged along the direction of the slide rail 531 and is fixed on the door panel assembly 5. After the trachea 8 is separated from the through hole 52, the baffle 532 loses its support and moves along the slide rail 531 under the action of the spring three 533, thereby covering the through hole 52. When the oxygen supply machine needs to be used again in the future, the door panel assembly is opened, the baffle 532 is opened to expose the through hole 52, and the trachea 8 can be passed through.

[0036] The pull rod assembly 4 includes a slide groove 41, which is opened on the back of the oxygen supply machine body 1 in the vertical direction. A pull rod 42 is slidably connected in the slide groove 41. The pull rod 42 is a hollow rod. A pull rod 2 43 is slidably connected in the pull rod 1 42. A card slot is opened on both the slide groove 41 and the pull rod 1 42. A limiting mechanism 47 is installed in the pull rod 1 42 and the pull rod 2 43. The limiting mechanism 47 can be respectively engaged with the corresponding card slots. A handshake 44 is connected to the top of the pull rod 2 43. When the handshake 44 is pulled until the limiting mechanism 47 is engaged with the corresponding card slot, the relative positions of the pull rods are fixed, which is convenient for the user to drive the oxygen supply machine body 1 to move through the pull rod assembly 4;

[0037] A button 45 is slidably connected inside the handshake 44, and a spring 1 46 is provided between the button 45 and the handshake 44. The bottom of the button 45 is connected to a push rod 2 451, and the bottom of the pull rod 2 43 is connected to a push rod 1 431. When the button 45 is pressed downward, the push rod 1 431 and the push rod 2 451 can respectively push the corresponding limit mechanism 7 downward to unlock, thereby resetting the pull rod assembly 4.

[0038] The limit mechanism 47 includes a connecting rod 471, one end of which is provided with a blocking block 472, which can engage with the corresponding slot to fix the position of each pull rod; the other end of the connecting rod 471 is sleeved with a spring 2 473, and the outer side of the spring 2 473 is sleeved with a guide sleeve 474, which is correspondingly fixed in the pull rod 1 42 and the pull rod 2 43 to ensure that the connecting rod 471 is fixed in the longitudinal direction, maintain the correspondence between the blocking block 472 and the slot position, and ensure the realization of the locking; the connecting rod 471 is provided with a wedge-shaped groove at one end facing the slot, and wedge blocks are correspondingly provided on the push rod 1 431 and the push rod 2 451. When the push rod 1 431 and the push rod 2 451 move downward, the wedge blocks thereof squeeze the corresponding wedge grooves and drive the connecting rod 471 to overcome the force of the spring 2 473 and move toward the side of the guide sleeve 474, thereby disengaging the blocking block 472 from the slot to achieve unlocking.

[0039] Specifically, a wire reel assembly 7 is provided inside the oxygen supply machine body 1. Before moving, the transfer rod 75 is moved out of the second slide groove 72 by the handle 751, and the connector 74 is moved out of the second slide groove 72 at the same time. The transfer rod 75 is rotated to a suitable angle, and the reel 71 can be conveniently rotated by the handle 751, thereby realizing the reeling of the trachea 8 and the wire 9, which is convenient for the subsequent movement of the oxygen supply machine.

[0040] After the trachea 8 is rolled up, it passes through the door panel assembly 5 through the through hole 52. The movable baffle 53 loses its support. Under the action of the spring 3 533, the baffle 532 moves to cover the through hole 52, thereby making the trachea opening in a relatively closed environment, reducing pollution from the external environment and improving safety in subsequent use.

[0041] A pull rod assembly 4 is installed in the oxygen supply machine body 1. The pull rod assembly 4 consists of several pull rods that can be slidably connected to each other. The pull rods can be fixed by a limiting mechanism 47 and a card slot. When it needs to be moved, the pull rod assembly 4 can be opened so that the handle 44 of the pull rod assembly 4 moves to a height suitable for the user to pull, and cooperates with the self-locking roller 2 at the bottom, so it can be easily moved without carrying.

[0042] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0044] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar pairs of elements and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An oxygen supply device that is easy to carry around, comprising an oxygen supply unit (1), an air pipe (8) and an electric wire (9), characterized in that: The bottom of the oxygen supply machine body (1) is equipped with a plurality of self-locking rollers (2) and a plurality of supporting legs (3), and the plurality of self-locking rollers (2) and the plurality of supporting legs (3) are respectively arranged on both sides of the oxygen supply machine body (1). A pull rod assembly (4) is provided on the side of the oxygen supply machine body (1) where the self-locking roller (2) is installed. Two wire-reeling assemblies (7) are installed in the oxygen supply machine body (1), and the air pipe (8) and the electric wire (9) are respectively wound on the two wire-reeling assemblies (7). The outer cover of the wire-reeling assembly (7) is provided with a door panel assembly (5). A movable lock (6) is installed on the oxygen supply machine body (1), and the movable lock (6) is locked with the door panel assembly (5).

2. The portable oxygen supply device according to claim 1, characterized in that: The winding assembly (7) includes a reel (71), and the reel (71) is used for winding. A friction sleeve (73) is fixed on the oxygen supply machine body (1). The reel (71) is rotatably connected to the oxygen supply machine body (1) and the friction sleeve (73). One end of the reel (71) points to the outside of the oxygen supply machine body (1). The end of the reel (71) pointing to the outside of the oxygen supply machine body (1) is provided with a second slide groove (72). A connector (74) is slidably connected in the second slide groove (72). The end of the connector (74) facing away from the reel (71) can extend out of the second slide groove (72). A transfer rod (75) is rotatably connected to the connector (74). The transfer rod (75) can be slidably connected to the second slide groove (72). A handle (751) is provided on the end of the transfer rod (75) facing away from the connector (74).

3. The portable oxygen supply device according to claim 2, characterized in that: The oxygen supply machine body (1) is provided with two receiving grooves (11), and the two receiving grooves (11) correspond to the two wire-receiving assemblies (7). A magnet (76) is provided at the bottom of the receiving groove (11). When the transfer rod (75) is pushed into the sliding groove (72), the handle (751) can be received in the receiving groove (11), and the handle (751) can be attracted to the magnet (76). A groove (752) is provided on the side of the handle (751) facing the connector (74). The user pulls the handle (751) through the groove (752) to separate it from the magnet (76).

4. The portable oxygen supply device according to claim 1, characterized in that: The door panel assembly (5) is provided with a second receiving groove (51), and the second receiving groove (51) is used to receive the plug of the electric wire (9). The second receiving groove (51) and the door panel assembly (5) are each provided with a through hole (52), and the two through holes (52) can pass through the air pipe (8) and the electric wire (9) respectively. A movable baffle (53) is provided on the through hole (52) through which the air pipe (8) is passed.

5. The portable oxygen supply device according to claim 4, characterized in that: The movable baffle (53) includes a slide rail (531), the slide rail (531) is fixed on the door panel assembly (5), a baffle (532) is slidably connected in the slide rail (531), the baffle (532) can cover the through hole (52) through which the air pipe (8) is passed, and a spring (533) is connected to the baffle (532), the spring (533) is arranged along the direction of the slide rail (531), and the spring (533) is fixed on the door panel assembly (5).

6. The portable oxygen supply device according to claim 1, characterized in that: The pull rod assembly (4) includes a slide groove (41), and the slide groove (41) is opened on the back of the oxygen supply machine body (1) in the vertical direction. The slide groove (41) is slidably connected with a pull rod (42), and the pull rod (42) is a hollow rod. The pull rod (43) is slidably connected with the pull rod (42). The slide groove (41) and the pull rod (42) are both provided with a card slot. The pull rod (42) and the pull rod (43) are both installed with a limiting mechanism (47). The limiting mechanism (47) can be respectively connected with the corresponding card slots, the top of the pull rod 2 (43) is connected with a handshake (44), and the handshake (44) is slidably connected with a button (45), and a spring (46) is provided between the button (45) and the handshake (44), and the bottom of the button (45) is connected with a push rod 2 (451), and the bottom of the pull rod 2 (43) is connected with a push rod 1 (431), and the push rod 1 (431) and the push rod 2 (451) can respectively push the corresponding limit mechanism (47) to unlock.

7. The portable oxygen supply device according to claim 6, characterized in that: The limiting mechanism (47) includes a connecting rod (471), one end of which is provided with a clamping block (472), and the clamping block (472) can be engaged with the clamping slot. The other end of the connecting rod (471) is sleeved with a spring 2 (473), and the outer side of the spring 2 (473) is sleeved with a guide sleeve (474), and the guide sleeve (474) is fixed in the pull rod 1 (42) and the pull rod 2 (43) respectively. The connecting rod (471) is provided with a wedge groove at one end facing the clamping slot, and the push rod 1 (431) and the push rod 2 (451) are provided with wedge blocks respectively. The push rod 1 (431) and the push rod 2 (451) can both push the connecting rod (471) to move to one side of the guide sleeve (474).

Citation Information

Patent Citations

  • Portable household oxygen generator

    CN219807782U