Multi-link opening and closing mechanism

Abstract

The invention discloses a multi-link opening and closing mechanism, comprising a base, a bracket arranged on the base, a guide rail extending in a vertical direction installed on the bracket, a connecting rod assembly installed, a slider connected to a gas distribution component arranged on the guide rail, the connecting rod assembly is hinged to the bracket and the slider respectively, and the connecting rod assembly is configured to drive the gas distribution component to move up and down; and a locking and positioning device is arranged, and the gas distribution component can be locked and positioned at the highest and lowest positions without shaking at will, etc. The multi-link opening and closing mechanism has a simple structure, is easy to operate, and is convenient for disassembly and installation of the gas distribution component, etc., and has reliable and high working stability.

Description

Technical Field

[0001] The present invention relates to the field of cell exposure, and in particular to a multi-link opening and closing mechanism required in a cell exposure system, wherein the mechanism can drive a gas distribution component in the cell exposure system to move up and down and can lock and position the gas distribution component. Background Art

[0002] The human health risk assessment of inhalable chemicals in the environment (such as cigarette smoke, motor vehicle exhaust, air pollutants, pesticides, new chemicals and nanomaterials, etc.) has always been the focus and difficulty of research in the field of environment and health. As an advanced method for studying inhalable substances, ALI cell exposure technology can dynamically simulate the direct exposure of respiratory epithelial cells to inhalable substances, and is suitable for inhalable substances in gaseous, liquid and solid forms. Therefore, this technology can be used to more realistically evaluate the respiratory toxicity of inhalable substances, and has become the preferred method for studying the pathogenic mechanisms of diseases related to environmental pollutants, including asthma, chronic obstructive pulmonary disease and lung cancer, and the European Center for the Validation of Chemical Alternative Methods has recommended that this method be included in the toxicological evaluation of new chemicals.

[0003] In order to further study the harm of harmful gases to the human body, gas poisoning equipment that can poison cells with harmful gases has appeared on the market. In some gas poisoning equipment, there are gas distribution components and constant temperature water bath components. When these two components are working, the constant temperature water bath component needs to be moved under the gas distribution component after filling. The two components are pressed together to work together. Therefore, it is necessary to provide a mechanism that drives the gas distribution component to move up and down and can position the gas distribution component. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a multi-link opening and closing mechanism which has a simple structure, can drive a gas distribution component to move up and down, and is easy to operate.

[0005] To achieve the above object, the present invention provides the following technical solution: a multi-link opening and closing mechanism, comprising a base, wherein brackets are fixedly arranged on both left and right sides of the base in the width direction, and the brackets on both left and right sides are provided with guide rails extending in the vertical direction, and the guide rails are connected to the gas distribution components that need to move up and down in the cell exposure system;

[0006] A connecting rod assembly is installed on the bracket, and the connecting rod assembly is configured to drive the gas distribution component to move up and down.

[0007] By adopting the above technical solution, a connecting rod assembly is set up, and the connecting rod assembly drives the gas distribution component to move up and down, which has a simple structure and is easy to operate. The guide rail is set to guide the gas distribution component when it moves up and down, avoiding directional deviation during up and down movement.

[0008] The present invention is further configured as follows: a sliding block is cooperatively connected to the guide rail, the gas distribution component is detachably fixedly connected to the sliding block, and the connecting rod assembly is hingedly connected to the sliding block and the bracket.

[0009] By adopting the above technical solution, the disassembly and installation of the gas distributor is convenient, and the maintenance of the gas distributor is convenient. The disassembly can be completed without disassembling the connecting rod assembly, and the operation is convenient.

[0010] The present invention is further configured as follows: the connecting rod assembly comprises a connecting rod and a handle, and the connecting rod and the handle are hingedly connected by a first hinge;

[0011] A second hinge is hingedly installed on one end of the handle facing the slider, and the handle is hingedly connected to the slider through the second hinge;

[0012] When the second hinge is located at the lowest position, the slider is moved to the lowest position driven by the second hinge, and the gas distribution component is located at the lowest position.

[0013] By adopting the above technical solution, when the handle of the connecting rod assembly is manually opened, the connecting rod assembly can drive the gas distribution component to move upward, so as to carry out subsequent operations; when the handle of the connecting rod assembly is buckled, the gas distribution component is driven to move downward to the lowest position. The whole mechanism has a simple structure, is easy to operate, and has good stability.

[0014] The present invention is further configured as follows: the multi-link opening and closing mechanism is provided with a locking function, and when the gas distribution component is located at the lowest position, the gas distribution component connected to the multi-link opening and closing mechanism is locked with the constant temperature water bath component in the cell exposure system.

[0015] By adopting the above technical solution and setting a locking function, it is avoided that the gas distribution components are not positioned accurately, the height of each opening and closing is inconsistent, the sealing is unreliable, and other problems lead to inaccurate experimental data.

[0016] The present invention is further configured as follows: an elastic member is fixedly connected to the lower side of the slider; when the slider is at the highest position, the elastic member is in an initial state; and when the slider is at the lowest position, the elastic member is compressed.

[0017] By adopting the above technical solution, the elastic member can support the gas distribution component, and when the gas distribution component is at the highest position, the elastic member can support the gas distribution component to prevent the gas distribution component from falling down under the action of gravity.

[0018] The present invention is further configured such that: the elastic member is preferably a compression spring.

[0019] By adopting the above technical solution, the compression spring has low cost, is easy to install and has good elasticity.

[0020] The present invention is further configured as follows: each of the brackets is provided with two guide rails, and the two guide rails are symmetrically arranged along a symmetry line in the length direction of the bracket.

[0021] By adopting the above technical solution, both ends of the slider are guided by guide rails, which improves the stability of its movement and prevents tilting.

[0022] The present invention is further configured as follows: the compression spring is sleeved on the guide rail.

[0023] By adopting the above technical solution, it is ensured that the compression spring will not tilt or bend during operation, thereby increasing the service life of the spring.

[0024] The present invention is further configured such that: when the gas distribution component is located at the lowest position, the multi-link opening and closing mechanism is at a dead point position, and the position of the slider is fixed, thereby achieving locking and positioning of the gas distribution component.

[0025] By adopting the above technical solution, the multi-link mechanism is in a locked and positioned state, which avoids the inaccurate positioning of the gas distribution components, inconsistent opening and closing heights each time, and unreliable sealing, which may lead to inaccurate test data.

[0026] The present invention is further configured such that: a plurality of weight-reducing holes are provided on the bracket and the handle.

[0027] By adopting the above technical solution, the overall weight of the bracket and the handle is reduced, making it easier to operate or move them.

[0028] In the present invention, the main function of the multi-link opening and closing mechanism is to be used in the cell exposure system to drive the gas distribution component to move up and down. When it is necessary to take or place the semipermeable membrane in the constant temperature water bath component, the gas distribution component is moved upward and the constant temperature water bath is moved out. After the semipermeable membrane is taken or placed, the constant temperature water bath is moved to the position below the gas distribution component, and then the gas distribution component is driven to move downward to contact the constant temperature water bath and press the constant temperature water bath.

[0029] The present invention has substantial features and progress in the prior art, which are mainly manifested in: 1) the connecting rod assembly drives the gas distribution component to move up and down, has a simple structure, is easy to operate, and is convenient for disassembly and installation of the gas distribution component; 2) the guide rail can guide the gas distribution component when it moves up and down, so that the gas distribution component will not deviate when it moves up and down, thereby affecting the clamping work of the constant temperature water bath; 3) the setting of the compression spring can prevent the gas distribution component from falling due to gravity when it moves to the upper position, and the operation is reliable and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Hereinafter, some specific embodiments of the present invention will be described in detail with reference to the accompanying drawings and embodiments in a non-limiting manner. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale.

[0031] Figure 1 It is a structural schematic diagram of the multi-link opening and closing mechanism of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the multi-link opening and closing mechanism of the present invention when it is working.

[0033] Among them, 1. base; 2. bracket; 21. clamping part; 3. slider; 4. handle; 41. slot; 5. connecting rod; 6. first hinge; 7. second hinge; 8. guide rail; 9. compression spring; 10. weight reduction hole; 11. gas distribution component; 12. constant temperature water bath component. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will refer to Figure 1 The embodiment of the multi-link opening and closing mechanism of the present invention is further described.

[0035] like Figure 1 As shown, a multi-link opening and closing mechanism comprises a base 1, on which a bracket 2 is fixedly connected, and the bracket 2 is fixed to the base 1 by bolts. There are two brackets 2, and the two brackets 2 are distributed on the left and right sides of the base 1 along the width direction; a guide rail 8 is fixedly arranged on the bracket 2, and the guide rail 8 is arranged in four pieces. The four guide rails 8 are evenly distributed on the two brackets 2 on the left and right sides in groups of two, and the two guide rails 8 on the same bracket 2 are symmetrically arranged along the length direction of the bracket 2; in order to facilitate the disassembly and installation of the gas distribution component 11, a slider 3 is installed on the two symmetrically arranged guide rails 8, and the slider 3 is provided with two guide holes (not shown in the figure), and the two guide holes are respectively penetrated into the two symmetrically arranged guide rails 8 to slide on the guide rails 8 in the vertical direction, and the left and right ends of the gas distribution component 11 are respectively detachably fixedly connected with the sliders 3 on the left and right sides, and can be fixedly connected by bolts and screws, or can be connected by clamping and other connection methods, and the slider 3 moves up and down along the guide rail 8, driving the gas distribution component 11 to move up and down.

[0036] The multi-link opening and closing mechanism also includes a connecting rod assembly, which includes a handle 4, a connecting rod 5, a first hinge 6, and a second hinge 7, wherein the connecting rod 5 is hingedly connected to the top of the bracket 2, the handle 4 is hingedly connected to the other end of the connecting rod 5 through the first hinge 6, and the handle 4 is hingedly connected to the slider 3 through the second hinge 7. The slider 3 can be driven to move up and down by rotating the handle 4. When the second hinge 7 is at the lowest position, the slider 3 is at the lowest position, and the gas distribution component 11 is at the lowest position. At this time, the handle 4 is in a vertical state and is buckled with the bracket 2; when the handle 4 is opened and the handle 4 is separated from the bracket 2, the slider 3 moves up, and when the handle 4 is opened at the maximum angle, the slider 3 is at the highest position, and the gas distribution component 11 is at the highest position.

[0037] In order to prevent the gas distribution component 11 from continuously sliding downward due to gravity when it is in the highest position, an elastic member is arranged under the slider 3. The elastic member is compressed when the slider 3 is in the lowest position, and is in an initial state when the slider 3 is in the highest position. When the slider 3 and the gas distribution component 11 tend to slide downward due to gravity, the elastic force of the elastic member will support the slider 3 and the gas distribution component 11 to prevent them from sliding downward. The elastic member can be made of elastic rubber and fixed under the slider 3. The present invention preferably uses compression springs 9. Four compression springs 9 are arranged, which correspond to four guide rails 8 and are respectively mounted on the guide rails 8, thereby ensuring that the compression spring 9 is compressed up and down in the vertical direction to prevent the center line of the compression spring 9 from deviating.

[0038] A further embodiment of the present invention is that the multi-link opening and closing mechanism is provided with a locking function. When the gas distribution component 11 is at the lowest position, the multi-link opening and closing mechanism is at a dead point position, and the gas distribution component 11 is fixed in position and cannot move up and down, thereby achieving a locking and sealing of the gas distribution component 11 and the constant temperature water bath component 12. A preferred embodiment of the present invention is that a card slot 41 is provided on the handle 4, the bracket 2 includes a moving cavity (not shown in the figure), the guide rail 8, the compression spring 9, and the slider 3 are all located in the moving cavity, and the upper crossbeam of the moving cavity is the card connection portion 21 of the bracket 2. When the gas distribution component 11 is at the lowest position, in order to prevent the gas distribution component 11 from moving upward under the elastic force of the compression spring 9, the card connection portion 21 and the card slot 41 on the handle 4 cooperate to act as a locking device to lock and position the gas distribution component 11.

[0039] A further embodiment of the present invention is that, in order to reduce the overall weight of the entire multi-link opening and closing mechanism and facilitate the movement of the multi-link opening and closing mechanism, weight-reducing holes 10 are opened on the bracket 2 and the handle 4. The opening of the weight-reducing holes 10 reduces the weight of the multi-link opening and closing mechanism, but does not reduce the physical properties of the bracket 2 and the handle 4, and does not affect their specific work and cause damage to the bracket 2 or the handle 4.

[0040] When the present invention is working, when it is necessary to take or place the semipermeable membrane into the constant temperature water bath component 12, the handle 4 is opened, the slider 3 and the gas distribution component 11 tend to move upward under the action of the compression spring 9, the handle 4 is turned outward, the gas distribution component 11 is moved upward, and then the constant temperature water bath component 12 is moved out. After taking or placing the semipermeable membrane, the constant temperature water bath component 12 is moved to a position below the gas distribution component 11, and then the handle 4 is rotated in the opposite direction until the gas distribution component 11 contacts and presses the constant temperature water bath component 12, and then the card slot 41 of the handle 4 is fixedly connected with the card connection portion 21 of the bracket 2. The whole structure is simple in structure, easy to operate, and has good working stability. It has a good application prospect in the field of cell exposure system.

[0041] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, any improvements and modifications made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A multi-link opening and closing mechanism, characterized by: It includes a base, and brackets are fixedly arranged on the left and right sides of the base in the width direction, and the brackets on the left and right sides are provided with guide rails extending in the vertical direction, and the guide rails are connected to the gas distribution components that need to move up and down in the cell exposure system; A connecting rod assembly is mounted on the bracket, and the connecting rod assembly is configured to drive the gas distribution component to move up and down; The guide rail is cooperatively connected with a slider, the gas distribution component is detachably fixedly connected to the slider, and the connecting rod assembly is hingedly connected to the slider and the bracket; The connecting rod assembly comprises a connecting rod and a handle, wherein the connecting rod is hingedly connected to the top of the bracket, and the handle is hingedly connected to the other end of the connecting rod through a first hinge; A second hinge is hingedly installed on one end of the handle facing the slider, and the handle is hingedly connected to the slider through the second hinge; When the second hinge is at the lowest position, the slider moves to the lowest position driven by the second hinge, and the gas distribution component is at the lowest position; The multi-link opening and closing mechanism is provided with a locking function. When the gas distribution component is located at the lowest position, the gas distribution component connected to the multi-link opening and closing mechanism is locked with the constant temperature water bath component in the cell exposure system.

2. The multi-link opening and closing mechanism according to claim 1 is characterized in that: An elastic member is fixedly connected to the lower side of the slider. When the slider is at the highest position, the elastic member is in an initial state. When the slider is at the lowest position, the elastic member is compressed.

3. The multi-link opening and closing mechanism according to claim 2 is characterized in that: The elastic member is a compression spring.

4. The multi-link opening and closing mechanism according to claim 1 is characterized in that: Each of the brackets is provided with two guide rails, and the two guide rails are symmetrically arranged along a symmetry line in the length direction of the bracket.

5. The multi-link opening and closing mechanism according to claim 3 is characterized in that: The compression spring is sleeved on the guide rail.

6. The multi-link opening and closing mechanism according to claim 1, characterized in that: When the gas distribution component is located at the lowest position, the multi-link opening and closing mechanism is at a dead point position, and the position of the slider is fixed, thereby achieving locking and positioning of the gas distribution component.

7. The multi-link opening and closing mechanism according to claim 1 is characterized in that: The bracket and the handle are both provided with a plurality of weight-reducing holes.

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