Intelligent self-adaptive pressure sore prevention mattress

Through the design of intelligent adaptive anti -pressure sore mattresses, the pressure of automatic adjustment of the non -fundamental position with induction elements and trigger rods is used to solve the problem of stable support in the existing technology when the patient's posture changes. Risk effect.

CN119367151APending Publication Date: 2025-01-28THE 980TH HOSPITAL OF THE CHINESE PEOPLES LIBERATION ARMY JOINT LOGISTICS SUPPORT FORCE
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Patent Information

Application Number
CN202411781602.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-01-28

AI Technical Summary

Technical Problem

In the prevention of pressure ulcers, it is difficult to provide stable support when the patient's position changes, resulting in the inability to effectively reduce the risk of pressure ulcers.

Method used

A intelligent self -adaptive anti -pressure sore mattress is designed to detect the gravity and temperature of the patient's body through induction components. The trigger lever combined with the upper and lower stuck and connecting rods to automatically adjust the pressure of the non -fundamental position to provide balanced support.

Benefits of technology

Realize stable support when the patient's posture changes, effectively reduce the risk of pressure ulcers, and fix the position after completing the adjustment to ensure that the patient gets stable support when turning over.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an intelligent self-adaptive pressure sore prevention mattress, and relates to the technical field of medical auxiliary instruments, the intelligent self-adaptive pressure sore prevention mattress comprises a mattress, a detection part, a moving part and a positioning part, after a patient lies on the mattress, gravity and temperature generated by the body of the patient are detected through sensing elements, and main fulcrums of the body of the patient are identified through the gravity; the range of the body of a patient is detected through temperature, a trigger rod works, an upper clamping frame and a lower clamping frame are separated from a clamping groove of a connecting rod through cooperation of an upper inclined block and an upper push block and cooperation of a lower inclined block and a lower push block, a temperature sensing area at the position of a non-fulcrum is lifted, and after pressure feedback is obtained and the pressure at the position of the fulcrum of the body of the patient is close to that at the position of the fulcrum of the body of the patient, the trigger rod works. The non-fulcrum position in the corresponding range of the body of the patient is lifted, protruded and supported, the pressure of the fulcrum position of the body of the patient is balanced and reduced, after adjustment is completed, the trigger rod is reset, the upper clamping frame and the lower clamping frame are connected with the clamping grooves of the connecting rods in a clamped mode, position fixing is completed, and stable support is provided when the patient turns over.
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Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to an intelligent self-adaptive anti-pressure sore mattress. Background Art

[0002] Pressure ulcer (PU), also known as bedsore or pressure ulcer, is a skin and / or tissue injury limited to the body position. This injury is caused by long-term continuous pressure on the tissue, resulting in insufficient blood supply, which in turn causes skin damage, ulcers and even necrosis. Pressure ulcers usually occur in people who are bedridden or sitting for a long time, especially those who have limited mobility and limited local nerve and blood supply. Pressure ulcers can be divided into four stages according to their severity.

[0003] The main cause of pressure sores is that the skin is subjected to continuous pressure for a long time, resulting in poor blood circulation, ischemia, hypoxia and lack of nutrients, which eventually cause skin necrosis and ulcer formation. High-risk groups include patients who have been bedridden for a long time and the elderly. Early pressure sores may manifest as changes in skin color and mild edema. As the disease progresses, blisters and ulcers may appear. In severe cases, they may penetrate deep into the muscles, bones or joints, forming necrosis. If infection occurs, it may lead to complications such as sepsis. Pressure sores are not contagious and have no incubation period.

[0004] At present, the treatment for pressure sores mainly includes debridement, local wound care, infection control, pain relief, and systemic nutritional support. If necessary, surgical treatment, including debridement and flap repair, can be considered. After active treatment, most patients with pressure sores have a good prognosis and can recover. During the treatment process, it is crucial to prevent the occurrence of various complications. The key measures to prevent pressure sores include regular changes in body position, keeping the skin clean and dry, moderate massage stimulation, using special mattresses and beds, and maintaining a balanced diet. In short, the management of pressure sores requires comprehensive consideration of care, treatment, and prevention measures.

[0005] In summary, the current process of bedsore prevention has the following technical problems: patients need to stay in bed for a long time due to their own condition or doctor's orders. When patients are in bed, due to the curvature of the human body structure, the tissues near the back of the head, shoulder blades, elbow joints, coccyx, and heels are prone to bedsores. Because the above-mentioned protruding structures of the human body serve as the main fulcrums in contact with the bed when lying in bed, the lower back, neck, calf and other positions are often in a suspended state and will not cause bedsores. In current clinical practice, medical staff will support patients in the suspended parts to reduce the pressure on the skin at other fulcrums to achieve the effect of reducing bedsores; however, patients will suffer from bedsores due to turning over, moving around, etc. The patient's body position changes due to movement, and the support placed by the medical staff may be separated, or even oppress the patient. The medical staff needs to manually change the support position in time. At the same time, the manual support operation leads to uneven support force, and the decompression effect on the patient's fulcrum position cannot be managed as expected; secondly, fluid mattresses are used in some pressure sore prevention work, which also achieves the above-mentioned effect of fitting with the patient's suspended part to reduce the pressure at the fulcrum position. However, in actual clinical actions, the fluid mattress's adaptability also makes it impossible to provide effective support. When the patient turns over and the nursing staff assists in turning over, the soft nature of the fluid mattress cannot provide support when the movement changes. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention provides an intelligent self-adaptive anti-pressure sore mattress.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] An intelligent self-adaptive anti-pressure sore mattress comprises a mattress, a detection part, a moving part and a positioning part. The mattress has a plurality of working modules in an array on the lower side. A group of working modules comprises a detection part and a moving part. The detection part comprises a sensing element. A moving part is arranged on the lower side of the sensing element. The moving part comprises a driving component and a connecting rod. The driving component drives the connecting rod to move longitudinally. A card slot is arranged on the connecting rod. The card slot of the connecting rod cooperates with the positioning part. The positioning part comprises a trigger component that cooperates with the card slot. The card connection component cooperates with the card slots of the connecting rods of all working modules. The trigger component changes the cooperation state between the card connection component and the card slot of the connecting rod.

[0009] Furthermore, the detection part also includes a top frame, a sensing element is provided on the upper side of the top frame, and the driving assembly includes a push rod, an upper end of the push rod is fixedly connected to a connecting rod, and an upper end of the connecting rod is fixedly connected to the top frame.

[0010] Further, the clamping assembly includes an upper positioning plate and a lower positioning plate, the upper positioning plate is provided with a plurality of upper grooves, the lower positioning plate is provided with a plurality of lower grooves, the upper grooves and the lower grooves correspond to the positions of a column of working modules, and the number of the upper grooves and the lower grooves is consistent with the number of working modules in a row;

[0011] The upper fixing plate is fixedly connected with an upper clamping frame on the left side of the upper slot, and the lower positioning plate is fixedly connected with a lower clamping frame on the left side of the lower slot. The upper clamping frame and the lower clamping frame are clamped and matched with the clamping slot.

[0012] Further, the trigger assembly includes a trigger rod, a fixed block, an upper inclined block and a lower inclined block, the upper positioning plate is fixedly connected to an upper fixed frame at the outer edge position of the upper slot in the opposite direction of the upper bracket, the upper fixed frame is fixedly connected to an upper inclined block, the distance between the upper inclined block and the upper positioning plate is equal to the width of the upper inclined block, and the inclined surface of the upper inclined block is downward and close to the direction of the upper positioning plate;

[0013] The lower positioning plate is fixedly connected with a lower fixing seat at the outer edge position on the same side of the lower slot connecting the lower bracket, the lower fixing seat is close to the lower fixing bracket, the lower fixing seat is fixedly connected with the lower fixing bracket, the lower fixing bracket is fixedly connected with a lower inclined block, and the inclined surface of the lower inclined block is downward and away from the lower positioning plate;

[0014] A fixed block is fixedly connected to the upper side of the trigger rod, an upper push block is arranged on the fixed block, a connecting block is fixedly connected between the upper push block and the fixed block, the upper push block has an inclined surface upward and away from the upper positioning plate, and the upper push block cooperates with the upper inclined block;

[0015] The fixed block is fixedly connected with a push-down block, the inclined surface of the push-down block is upward and close to one side of the lower positioning plate, and the push-down block cooperates with the lower inclined block.

[0016] Furthermore, an outer frame and a side frame are arranged around the lower side of the mattress, the outer frame is fixedly connected to the side frame, a lower groove is opened on the lower side of the outer frame to cooperate with the push rod of each working unit, an upper groove is opened on the upper side of the outer frame to cooperate with the top frame of each working unit, a transverse groove is opened on the lower side of the upper groove to be laterally slidably connected to the upper positioning plate and the lower positioning plate, and a return spring is fixedly connected to the outer edge position of the upper positioning plate on the same side as the upper groove connecting the upper bracket, and the return spring is fixedly connected to the upper positioning plate;

[0017] The lower positioning plate is fixedly connected with a return spring at the outer edge position on the same side of the lower slot where the lower bracket is connected, and the return spring is fixedly connected to the upper positioning plate.

[0018] Furthermore, the pushing member and the trigger rod are hydraulic rods, which include a cylinder body and a piston rod. The cylinder bodies of the working modules are fixedly connected, and the cylinder bodies on the outside are fixedly connected to the outer frame or the side frame.

[0019] Furthermore, the sensing element of the working module includes a pressure sensing element and a temperature sensing element, the sensing element is electrically connected to the push rod and the trigger rod, and a chip is provided between the sensing element and the push rod and the trigger rod.

[0020] Furthermore, the electrical connection includes but is not limited to the data line connection in the prior art.

[0021] Beneficial effects of the present invention:

[0022] An intelligent self-adaptive anti-pressure sore mattress. After a patient lies on the mattress, the gravity and temperature generated by the patient's body are detected by a sensing element, the main fulcrum of the patient's body is identified by gravity, the range of the patient's body is detected by temperature, the trigger rod is operated, the upper inclined block and the upper push block cooperate, the lower inclined block and the lower push block cooperate, so that the upper card frame, the lower card frame and the card slot of the connecting rod are disengaged, and the temperature sensing area of ​​the non-fulcrum position is lifted. After pressure feedback is obtained and the pressure is close to the fulcrum position of the patient's body, the non-fulcrum position within the corresponding range of the patient's body is lifted to protrude and support, so as to balance and reduce the pressure at the fulcrum position of the patient's body. After the adjustment is completed, the trigger rod is reset, and the upper card frame, the lower card frame and the card slot of the connecting rod are clamped to complete the position fixation, thereby providing stable support when the patient turns over.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of the intelligent adaptive anti-pressure sore mattress according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structural connection of the detection unit, the moving unit and the positioning unit according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the upper positioning plate and the lower positioning plate according to an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the trigger component according to an embodiment of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the upper positioning plate according to an embodiment of the present invention;

[0030] Figure 6 is a schematic cross-sectional structure diagram of the upper positioning plate according to an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the fixed block, the upper push block and the lower push block according to the embodiment of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the lower positioning plate according to an embodiment of the present invention;

[0033] Fig. 9 is a schematic structural diagram of a cross section of a lower positioning plate according to an embodiment of the present invention;

[0034] Fig.10 A schematic diagram of the structure of the working module and the trigger component according to an embodiment of the present invention;

[0035] Fig.11 This is a schematic diagram of the structure of the working module according to an embodiment of the present invention;

[0036] Fig.12 It is a schematic diagram of the structure of the outer frame and the side frame according to an embodiment of the present invention;

[0037] Fig.13 It is a schematic diagram of the structure of the external frame according to an embodiment of the present invention;

[0038] Fig.14 It is a schematic diagram of the structure of the upper positioning plate, the lower positioning plate and the return spring according to an embodiment of the present invention;

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] 1-mattress, 110-top frame, 111-sensing element, 112-connecting rod, 113-card slot, 120-pushing rod, 2-outer frame, 201-lower side slot, 202-upper side slot, 203-horizontal slot, 204-reset spring, 205-side frame, 210-upper positioning plate, 211-upper slot, 212-upper card frame, 213-upper fixed frame, 214-upper inclined block, 220-lower positioning plate, 221-lower slot, 222-lower card frame, 223-lower fixed seat, 224-lower fixed frame, 225-lower inclined block, 3-fixed block, 301-upper push block, 302-connecting block, 302-lower push block, 310-trigger rod. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1-14 Shown

[0044] The present invention discloses an intelligent self-adaptive anti-pressure sore mattress (1), comprising a mattress (1), a detection unit, a moving unit and a positioning unit. The mattress (1) has a plurality of working modules arrayed on the lower side, and a group of working modules includes a detection unit and a moving unit. The detection unit includes a sensing element (111). The moving unit is provided on the lower side of the sensing element (111). The moving unit includes a driving component and a connecting rod (112). The driving component drives the connecting rod (112) to move longitudinally. The connecting rod (112) is provided with a card slot (113). The card slot (113) of the connecting rod (112) cooperates with the positioning unit. The positioning unit includes a trigger component that cooperates with the card slot (113). The card slot (113) of the connecting rod (112) of all working modules cooperates. The trigger component changes the cooperation state between the card slot (113) of the connecting rod (112).

[0045] The detection unit also includes a top frame (110), a sensing element (111) is provided on the upper side of the top frame (110), and the driving assembly includes a push rod (120), the upper end of the push rod (120) is fixedly connected to a connecting rod (112), and the upper end of the connecting rod (112) is fixedly connected to the top frame (110);

[0046] The clamping assembly comprises an upper positioning plate (210) and a lower positioning plate (220); the upper positioning plate (210) is provided with a plurality of upper grooves (211); the lower positioning plate (220) is provided with a plurality of lower grooves (221); the upper grooves (211) and the lower grooves (221) correspond to the positions of a column of working modules; the number of the upper grooves (211) and the lower grooves (221) is consistent with the number of working modules in a row; the upper fixing plate is fixedly connected with an upper clamping frame (212) on the left side of the upper groove (211); the lower positioning plate (220) is fixedly connected with a lower clamping frame (222) on the left side of the lower groove (221); the upper clamping frame (212) and the lower clamping frame (222) are clamped and matched with the clamping slot (113);

[0047] Example 2

[0048] like Figure 4-14 Shown

[0049] The trigger assembly of the present invention comprises a trigger rod (310), a fixing block (3), an upper inclined block (214) and a lower inclined block (225); the upper positioning plate (210) is fixedly connected to an upper fixing frame (213) at an outer edge position on the opposite side of the upper slot (211) connecting to the upper clamping frame (212); the upper fixing frame (213) is fixedly connected to an upper inclined block (214); the distance between the upper inclined block (214) and the upper positioning plate (210) is equal to the width of the upper inclined block (214); the inclined surface of the upper inclined block (214) is downward and close to the direction of the upper positioning plate (210); the lower positioning plate (220) is fixedly connected to a lower fixing seat (223) at an outer edge position on the same side of the lower slot (221) connecting to the lower clamping frame (222); the lower fixing seat (223) is close to the lower fixing frame (224); the lower fixing seat (224) is close to the lower fixing seat (224); the lower fixing seat (224) is close to the lower fixing seat (224); the lower fixing seat (224) is close to the lower fixing seat (224); the lower fixing seat (224) is close to the lower fixing seat (224); the lower fixing seat (224) is close to the lower fixing seat (224); the lower fixing seat (224) is close to the upper fixing seat (224); the upper ... 23) is fixedly connected with a lower fixed frame (224), and a lower inclined block (225) is fixedly connected with the lower fixed frame (224), and the inclined surface of the lower inclined block (225) is downward and away from the lower positioning plate (220); the upper side of the trigger rod (310) is fixedly connected with a fixed block (3), and an upper push block (301) is provided on the fixed block (3), and a connecting block (302) is fixedly connected between the upper push block (301) and the fixed block (3), and the inclined surface of the upper push block (301) is upward and away from the upper positioning plate (210), and the upper push block (301) cooperates with the upper inclined block (214); the fixed block (3) is fixedly connected with a lower push block (302), and the inclined surface of the lower push block (302) is upward and close to one side of the lower positioning plate (220), and the lower push block (302) cooperates with the lower inclined block (225);

[0050] The mattress (1) is provided with an outer frame (2) and a side frame (205) around the lower side, the outer frame (2) is fixedly connected to the side frame (205), the lower side of the outer frame (2) is provided with a lower side groove (201) cooperating with the push rod (120) of each working unit, the upper side of the outer frame (2) is provided with an upper side groove (202) cooperating with the top frame (110) of each working unit, and the lower side of the upper side groove (202) is provided with a side groove (201) for transversely slidingly connecting with the upper positioning plate (210) and the lower positioning plate (220). The upper positioning plate (210) is fixedly connected to a return spring (204) at an outer edge position on the same side as the upper groove (211) connecting the upper clamping frame (212), and the return spring (204) is fixedly connected to the upper positioning plate (210); the lower positioning plate (220) is fixedly connected to a return spring (204) at an outer edge position on the same side as the lower groove (221) connecting the lower clamping frame (222), and the return spring (204) is fixedly connected to the upper positioning plate (210);

[0051] The pusher and the trigger rod (310) are hydraulic rods, which include a cylinder body and a piston rod. The cylinder bodies of the working modules are fixedly connected, and the cylinder bodies on the outside are fixedly connected to the outer frame (2) or the side frame (205);

[0052] The sensing element (111) of the working module comprises a pressure sensing element and a temperature sensing element, the sensing element (111) is electrically connected to the push rod (120) and the trigger rod (310), and a chip is provided between the sensing element (111) and the push rod (120) and the trigger rod (310);

[0053] The electrical connection includes but is not limited to the data line connection in the prior art.

[0054] In summary, the present invention provides an intelligent self-adaptive anti-pressure sore mattress (1). After a patient lies on the mattress (1), the gravity and temperature generated by the patient's body are detected by the sensing element (111), the main fulcrum of the patient's body is identified by gravity, and the range of the patient's body is detected by temperature, so that the trigger rod (310) works, and the upper inclined block (214) and the upper push block (301) cooperate, and the lower inclined block (225) and the lower push block (302) cooperate, so that the upper bracket (212), the lower bracket (222) and the connecting rod (110) are connected. 2) is disengaged from the card slot (113), and the temperature sensing area at the non-fulcrum position is lifted. After obtaining pressure feedback and the pressure is close to the fulcrum position of the patient's body, the non-fulcrum position within the corresponding range of the patient's body is lifted to protrude and support, so as to balance and reduce the pressure at the fulcrum position of the patient's body. After the adjustment is completed, the trigger rod (310) is reset, and the upper card frame (212) and the lower card frame (222) are connected to the card slot (113) of the connecting rod (112), so as to complete the position fixing and provide stable support when the patient turns over.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent self-adaptive anti-pressure sore mattress, characterized by: It includes a mattress, a detection part, a moving part and a positioning part. The lower side array of the mattress has several working modules. One group of working modules includes a detection part and a moving part. The detection part includes a sensing element. The lower side of the sensing element is provided with a moving part. The moving part includes a driving component and a connecting rod. The driving component drives the connecting rod to move longitudinally. The connecting rod is provided with a slot. The slot of the connecting rod cooperates with the positioning part. The positioning part includes a trigger component that cooperates with the slot. The clamping component cooperates with the slots of the connecting rods of all working modules. The trigger component changes the cooperation state between the clamping component and the slot of the connecting rod.

2. The intelligent adaptive anti-pressure sore mattress according to claim 1, characterized in that: The detection part also includes a top frame, and a sensing element is arranged on the upper side of the top frame. The driving assembly includes a push rod, and the upper end of the push rod is fixedly connected to the connecting rod, and the upper end of the connecting rod is fixedly connected to the top frame.

3. The intelligent adaptive anti-pressure sore mattress according to claim 2, characterized in that: The clamping assembly includes an upper positioning plate and a lower positioning plate, the upper positioning plate is provided with a plurality of upper grooves, the lower positioning plate is provided with a plurality of lower grooves, the upper grooves and the lower grooves correspond to the positions of a column of working modules, and the number of the upper grooves and the lower grooves is consistent with the number of working modules in a row; The upper fixing plate is fixedly connected with an upper clamping frame on the left side of the upper slot, and the lower positioning plate is fixedly connected with a lower clamping frame on the left side of the lower slot. The upper clamping frame and the lower clamping frame are clamped and matched with the clamping slot.

4. The intelligent adaptive anti-pressure sore mattress according to claim 3, characterized in that: The trigger assembly includes a trigger rod, a fixed block, an upper inclined block and a lower inclined block. The upper positioning plate is fixedly connected to an upper fixed frame at the outer edge position of the upper slot in the opposite direction of the upper bracket. The upper fixed frame is fixedly connected to an upper inclined block. The distance between the upper inclined block and the upper positioning plate is equal to the width of the upper inclined block. The inclined surface of the upper inclined block is downward and close to the direction of the upper positioning plate. The lower positioning plate is fixedly connected with a lower fixing seat at the outer edge position on the same side of the lower slot connecting the lower bracket, the lower fixing seat is close to the lower fixing bracket, the lower fixing seat is fixedly connected with the lower fixing bracket, the lower fixing bracket is fixedly connected with a lower inclined block, and the inclined surface of the lower inclined block is downward and away from the lower positioning plate; A fixed block is fixedly connected to the upper side of the trigger rod, an upper push block is arranged on the fixed block, a connecting block is fixedly connected between the upper push block and the fixed block, the upper push block has an inclined surface upward and away from the upper positioning plate, and the upper push block cooperates with the upper inclined block; The fixed block is fixedly connected with a push-down block, the inclined surface of the push-down block is upward and close to one side of the lower positioning plate, and the push-down block cooperates with the lower inclined block.

5. The intelligent adaptive anti-pressure sore mattress according to claim 4, characterized in that: An outer frame and a side frame are arranged around the lower side of the mattress, the outer frame is fixedly connected to the side frame, a lower side groove is opened on the lower side of the outer frame to cooperate with the push rod of each working unit, an upper side groove is opened on the upper side of the outer frame to cooperate with the top frame of each working unit, a transverse groove is opened on the lower side of the upper side groove to be laterally slidably connected to the upper positioning plate and the lower positioning plate, and a return spring is fixedly connected to the outer edge position of the upper positioning plate on the same side direction as the upper groove connecting the upper clamping frame, and the return spring is fixedly connected to the upper positioning plate; The lower positioning plate is fixedly connected with a return spring at the outer edge position on the same side of the lower slot where the lower bracket is connected, and the return spring is fixedly connected to the upper positioning plate.