Clamping and positioning device for tension detection of safety needle

Abstract

The invention relates to a clamping and positioning device for tension detection of a safety needle, which comprises a positioning rack and a fixing assembly, a positioning structure is arranged on the positioning rack, and the fixing assembly can be used for pressing the safety needle; the fixing assembly comprises an assembly supporting part and a fixing pressing block, the fixing pressing block is provided with an original position and a pressing position, and the fixing pressing block located at the original position can move to the position above the corresponding pressing position through movement in the front-back direction and the left-right direction and then move to the pressing position through movement in the up-down direction to press the safety needle. And the fixed pressing block in the pressing position can move out of the pressing position through vertical movement, and then returns to the original position through front-back and left-right movement. The device is simple and compact in structure and convenient to operate, can avoid interference on taking and placing of the safety needle during feeding and discharging, can compress fixed parts of the safety needle when the safety needle is subjected to tension detection, cannot damage the safety needle, makes preparations for automatic tension detection, and ensures the quality of automatic tension detection of the safety needle.

Description

Technical Field

[0001] The invention relates to a clamping and positioning device for safety needle tension detection, belonging to the technical field of safety needle detection. Background Art

[0002] After using injection needles, blood collection needles, dispensing needles, flushing needles and other medical needles, most people will just throw them away. Since traditional injection needles, blood collection needles, dispensing needles, flushing needles and other medical needles do not have safety protection devices, when cleaning up waste and recycling, workers are often injured by needle sticks, and there is also a risk of cross infection. For this reason, professionals have designed a variety of safety needles that can hide the needles after use to prevent harm to the human body. The sliding sleeve protection safety needle is one of them that is very convenient to operate.

[0003] The so-called sliding sleeve protection safety needle Z00 is as follows Figure 15-17 As shown, it includes a needle handle Z01 and a needle Z14 inserted in the needle handle Z01. The needle handle Z01 connects the needle Z14 with one end of the catheter Z12. The needle handle Z01 is provided with a wing Z04. The other end of the catheter Z12 is connected to the needle holder Z13. It also includes an inner sliding sleeve Z05, an outer sliding sleeve Z09 and a needle shield Z11 sleeved on the needle handle Z01. The factory state of the safety needle Z00 is that the outer sliding sleeve Z09 and the inner sliding sleeve Z05 are sleeved on the root of the needle handle Z01 in sequence, and the needle shield Z11 is sleeved on the head of the needle handle Z01 and protects the needle Z14. When in use, the medical staff removes the shield and can use it like an ordinary needle. Before discarding after use, the medical staff only needs to gently pull the outer sliding sleeve Z09 to make the outer sliding sleeve Z09 and the inner sliding sleeve Z05 unfold in sequence to protect the needle Z14. In this way, the needle Z14 will not injure the staff during the garbage transfer and processing, so it is called the safety needle Z00.

[0004] In order to prevent the inner sleeve Z05 and the outer sleeve Z09 from sliding randomly and affecting normal use, or from retracting under external force after being pulled apart and exposing the needle Z14 when discarded, a locking mechanism needs to be provided on the needle handle Z01, the inner sleeve Z05 and the outer sleeve Z09, and the locking mechanism includes a first card slot Z02 provided at the rear of the needle handle Z01, a second card slot Z03 provided at the front of the needle handle Z01, a first buckle Z06 provided at the rear of the inner sleeve Z05, a third card slot Z07 provided at the rear of the inner sleeve Z05, a fourth card slot Z08 provided at the front of the inner sleeve Z05, and a second buckle Z10 provided at the rear of the outer sleeve Z09. In the factory state, the first card slot Z02 and the first buckle Z06, and the third card slot Z07 and the second buckle Z10 are mutually engaged and in a locked state, which will not affect normal operation. When it is necessary to discard and pull it apart, the first buckle Z06 and the second slot Z03, the second buckle Z10 and the fourth slot Z08 are respectively engaged in a locked state and will not retract.

[0005] Since the inner sleeve, outer sleeve and needle handle are generally made of plastic, their slots and buckles cannot guarantee precise fit, and the injection needle needs to be connected to adjacent parts by gluing on the production line. In the factory state, the inner sleeve, outer sleeve and needle handle may be too tightly fitted, making it difficult for medical staff to pull the sleeve, which does not meet the environmental protection requirements for discarding safety needles. Therefore, it is very important to control the sleeve tension of each safety needle within the standard requirements. Whether it meets the requirements requires the safety needle to be pulled, that is, tension tested.

[0006] At present, this inspection work can only rely on manual pulling and sampling, and its shortcomings are: first, the efficiency is too low and cannot be fully tested; second, the force is based on feeling without accurate standards; third, the stroke is not well controlled. Once it is pulled to the locked state when it is discarded, the safety needle is scrapped as a whole and cannot be restored. As a disposable consumable, the safety needle is used in large quantities, so efficient and accurate automated safety needle tension detection equipment is needed to replace manual sampling. For automated testing, the first thing to do is to realize the positioning of the safety needle. The clamping and positioning of the safety needle is the first guarantee for realizing automated testing. Therefore, there is an urgent need for a clamping and positioning device for safety needle tension testing, which can stably position the safety needle and the fixed parts of the safety needle during tension testing, and can meet different clamping and positioning requirements during tension testing. Summary of the invention

[0007] The present invention aims at the deficiencies in the prior art and provides a clamping and positioning device for detecting the tension of a safety needle.

[0008] The technical solution of the present invention to solve the above technical problem is as follows: a clamping and positioning device for safety needle tension detection, comprising a positioning frame and a fixing assembly arranged on the positioning frame, the positioning frame is provided with a positioning structure for positioning the safety needle, and the fixing assembly can be used to compress the safety needle;

[0009] The fixed assembly includes an assembly support portion and a fixed pressure block arranged on the assembly support portion and capable of acting on the needle handle and / or wing of the safety needle, the fixed pressure block having an original position and a pressing position, the fixed pressure block in the original position being able to move to the upper side corresponding to the pressing position by moving in the front-back and left-right directions, and then being moved to the pressing position by moving in the up-down direction to press the needle handle and / or wing of the safety needle; the fixed pressure block in the pressing position being able to move out of the pressing position by moving in the up-down direction to release the safety needle, and then being able to return to the original position by moving in the front-back and left-right directions.

[0010] The beneficial effects of the present invention are as follows: when the safety needle is subjected to a tensile force test, the safety needle needs to be pressed to pull the outer sliding sleeve or the inner sliding sleeve. The clamping and positioning device is designed with a fixed assembly, which can press the safety needle placed on the positioning frame and ensure that the pressing of the safety needle does not hinder the placement and removal of the safety needle on the positioning frame. For this purpose, the fixed pressing block is provided with an original position and a pressing position. When the fixed pressing block is in the original position, the safety needle can be placed on the positioning frame to wait for the tensile force test, and the safety needle can also be taken out after the tensile force test, and the fixed pressing block will not interfere with the placement and removal of the safety needle; when the fixed pressing block is in the pressing position The safety needle can be compressed to facilitate the tension detection of the safety needle; in order to ensure the compression effect of the fixed pressure block on the safety needle, the action of the fixed pressure block to the compression position is also improved, the fixed pressure block in the original position first moves in the front-back and left-right directions, and then moves in the up-down direction to descend to the compression position to compress the safety needle; the action of the fixed pressure block returning to the original position is also limited, the fixed pressure block in the compression position first moves in the up-down direction, that is, rises to disengage from the safety needle, and then moves in the front-back and left-right directions to return to the original position, avoiding the damage of the safety needle by the forced forward-backward or left-right direction action. The present invention has a simple and compact structure and is easy to operate. It can avoid interfering with the placement and removal of the safety needle during loading and unloading. It can compress the immovable parts of the safety needle during the tension detection of the safety needle, prepare for the automated tension detection, and the compression and loosening of the safety needle will not damage the safety needle, ensuring the quality of the automated tension detection of the safety needle.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the assembly support part includes a fixed frame, a fixed slide, a fixed bar, a movable track plate and a fixed track plate, the fixed frame is arranged on the positioning frame for sliding up and down, the fixed slide is arranged on the fixed frame for sliding forward and backward, the fixed bar is arranged on the fixed slide for sliding left and right, the fixed pressure block is arranged on the fixed bar, the fixed track plate is arranged on the fixed frame, and the movable track plate is arranged on the fixed slide for sliding up and down; a first linkage is provided between the movable track plate and the fixed bar, a second linkage is provided between the movable track plate and the fixed track plate, and a limit pin assembly that can be locked and unlocked with the movable track plate is also provided on the fixed slide.

[0013] The beneficial effect of adopting the above further scheme is that the fixed pressure block is arranged on the fixed bar, the fixed bar is arranged to slide left and right on the fixed slide, the movable track plate is arranged to slide up and down on the fixed slide, the fixed slide is arranged to slide forward and backward on the fixed frame, the fixed track plate is arranged on the fixed frame, and the fixed frame is arranged to slide up and down on the positioning frame. In order to realize the movement of the fixed pressure block between the original position and the pressing position, the relative relationship between the above-mentioned various components in the fixed assembly is set to meet the demand for the fixed pressure block to change between the original position and the pressing position. When the fixed pressure block moves to the pressing position, the movable track plate is driven by the power The action is performed downward, and the fixed bar drives the fixed pressure block to move right under the action of the first linkage. Since the fixed frame is set on the positioning frame for sliding up and down, the fixed frame will not move in the front and back directions. Therefore, under the action of the second linkage, the movable track plate will move forward. Since the movable track plate is set on the fixed slide for sliding up and down, the fixed slide will carry the fixed bar and the fixed pressure block forward. When the movable track plate moves to the limit position where the movable track plate cannot move forward under the action of the second linkage, the movable track plate will no longer move forward due to the influence of the fixed track plate, and the fixed pressure block can move right and forward to the pressing position When the movable track plate moves downward again, it will drive the fixed track plate to move downward. Since the fixed track plate is installed on the fixed frame, and the fixed frame is set on the positioning frame for sliding up and down, the fixed frame moves downward, and the fixed pressure block moves downward to the pressing position to press the safety pin; when the fixed pressure block is in the pressing position, the limit pin assembly is locked and matched with the movable track plate; after the tension test is completed, the fixed pressure block needs to return to the original position, and the movable track plate moves upward under the action of power drive. Due to the locking and matching relationship between the limit pin assembly and the movable track plate, the fixed slide plate is driven to move upward, and the fixed slide plate is set on the fixed frame for sliding back and forth, so the fixed frame The movable track plate moves upward, and the fixed pressure block rises to above the clamping position and disengages from the safety pin. The movable track plate continues to move upward, and the lock of the limit pin assembly and the movable track plate is released. After the release, the movable track plate drives the fixed bar to move leftward under the action of the first linkage member, and under the action of the second linkage member, the fixed track plate is set on the fixed frame, and the fixed frame can only slide up and down, so the movable track plate moves backward, thereby driving the fixed slide plate, the fixed bar and the fixed pressure block on the fixed bar to move backward, and the fixed pressure block can be reset by moving left and backward, and then the safety pin that has completed the tension test can be discharged, and the safety pin to be tested can be loaded onto the positioning rack and wait for testing.

[0014] Furthermore, the limit pin assembly includes a pin rack, an overhead pin movably arranged on the pin rack, and a latch pin, the pin rack is arranged on the fixed slide plate, the movable track plate is provided with a pin slot, a latch pin spring is provided between the latch pin and the fixed slide plate, under the action of the latch pin spring, the free end of the latch pin can act on the side of the movable track plate or be inserted into the pin slot, a pin push rod is provided on the latch pin, a pin push groove matching the pin push rod is provided at the lower part of the overhead pin, a pin limiting ring is provided at the upper part of the overhead pin, an overhead spring is mounted on the overhead pin between the pin limiting ring and the pin rack, and a limiting plate capable of positioning the pin limiting ring is provided on the positioning frame.

[0015] The beneficial effect of adopting the above further scheme is that when the fixed pressure block is in the clamping position, the pin is inserted into the pin slot. When the fixed pressure block needs to return to the original position from the clamping position, the limit pin assembly can also ensure that the fixed pressure block is first raised, and then moves in the left and right, front and back directions. When resetting, the movable track plate moves upward under the action of power drive. Since the pin is inserted in the pin slot, the pin holder is fixedly installed on the fixed slide plate, and the fixed slide plate is slidably arranged on the fixed frame forward and backward, it will drive the fixed frame to move upward, and the fixed pressure block will First, the needle handle and / or wing of the safety needle are moved up and away from the needle handle. As the pin rack moves up, the pin limit ring contacts the limit plate of the positioning rack, the overhead force compresses the overhead spring and moves downward, the pin lever moves left, the latch compresses the latch spring, the latch disengages from the pin slot, and the fixed pressure block moves up into place. As the movable track plate continues to move up, under the action of the first linkage, the fixed bar carries the fixed pressure block to move to the left, and under the action of the second linkage, the movable track plate drives the fixed slide plate to move backward, the fixed pressure block moves left and backward, and the fixed pressure block returns to the original position from the clamping position.

[0016] Furthermore, the first linkage member includes a first oblique slot hole and a first limiting column movable in the first oblique slot hole, the first oblique slot hole is arranged on the movable track plate, and the first limiting column is arranged on the fixing bar.

[0017] The beneficial effect of adopting the above further scheme is that the first limit column can move in the first inclined slot hole. Under the action of the first linkage member, when the movable track plate moves in the up and down directions, the fixed pressure block can move in the left and right directions, thereby realizing the power transmission from the up and down movement of the movable track plate to the left and right movement of the fixed pressure block.

[0018] Furthermore, the second linkage member includes a second oblique slot hole and a second limiting column that can move in the second oblique slot hole, the second oblique slot hole is arranged on the fixed track plate, and the second limiting column is arranged on the movable track plate.

[0019] The beneficial effect of adopting the above further scheme is that the second limit column can move in the second inclined slot hole. Under the action of the second linkage member, when the movable track plate moves in the up and down directions, the fixed pressure block can move in the front and back directions, thereby realizing the power transmission from the up and down movement of the movable track plate to the front and back movement of the fixed pressure block.

[0020] Furthermore, it also includes a shield transfer assembly slidably arranged on the positioning frame, and the shield transfer assembly can be used to clamp and transfer the needle shield of the safety needle.

[0021] The beneficial effect of adopting the above further scheme is that the clamping and positioning device can not only press the safety needle through the fixed assembly during the tension test, and prepare for positioning the safety needle for the tension test of the outer sleeve and the inner sleeve of the safety needle, but also, of course, when the tension test of the inner sleeve is carried out, the sheath transfer assembly can be used to clamp the needle sheath and move it forward a certain distance to avoid the needle sheath interfering with the tension test of the inner sleeve.

[0022] Furthermore, it also includes a fork mechanism, which includes a fork, which is rotatably arranged on the positioning frame, one end of the fork is provided with a first shifting groove opening that can drive the fixing assembly to compress the safety needle, and the other end is provided with a second shifting groove opening that can drive the sheath transfer assembly to clamp the needle sheath of the safety needle.

[0023] The beneficial effect of adopting the above further scheme is that the drive of the fixed assembly and the sheath transfer assembly can be set separately, each with an independent power drive, and of course, the drive of both can be achieved through a single power drive and the above fork mechanism. The first shifting notch can cooperate with the movable track plate of the fixed assembly, and a track plate shifting shaft that cooperates with the first shifting notch can be set on the movable track plate. When the first shifting notch swings upward or downward, it can drive the movable track plate of the fixed assembly to move up or down, thereby achieving the purpose of loosening the safety needle or tightening the safety needle of the fixed assembly; the second shifting notch can cooperate with the driving component of the sheath transfer assembly, such as the second shifting notch can cooperate with the driving top plate of the sheath transfer assembly. When the second shifting notch swings downward or upward, the sheath transfer assembly can loosen the needle sheath or hold the needle sheath. The design of the fork mechanism can use one power to simultaneously meet the needs of the fixed assembly to compress the safety needle and the sheath transfer assembly to clamp and transfer the needle sheath of the safety needle, reducing the number of driving components and reducing costs. It also facilitates the rotation of the clamping and positioning device between various workstations and reduces the energy consumption of the rotation drive.

[0024] Furthermore, the sheath transfer assembly includes a sheath claw frame, a sheath transfer drive mechanism for driving the sheath claw frame to move forward and backward, a sheath clamping unit arranged on the sheath claw frame, and a sheath clamping drive mechanism for driving the sheath clamping unit to open and close. The sheath claw frame is slidably arranged on the positioning frame forward and backward, the sheath clamping unit clamps or releases the needle sheath under the action of the sheath clamping drive mechanism, and the sheath claw frame can drive the needle sheath to move forward or backward under the action of the sheath transfer drive mechanism.

[0025] The beneficial effect of adopting the above further scheme is that under the action of the sheath clamping drive mechanism, the sheath clamping unit can clamp or loosen the needle sheath of the safety needle; the sheath claw frame can move forward and backward relative to the positioning frame under the action of the sheath transfer drive mechanism, and after the sheath clamping unit clamps the needle sheath, it can drive the needle sheath to move forward to avoid the needle sheath interfering with the inner sliding sleeve of the safety needle to be pulled out for tension detection. When resetting is required, the sheath clamping unit can clamp the needle sheath and then move backward to achieve resetting of the needle sheath of the safety needle.

[0026] Furthermore, the sheath clamping unit includes a pair of sheath claws located on both sides of the needle sheath, the middle parts of the sheath claws are hinged on the sheath claw frame, and a claw spring is provided between the upper parts of the pair of sheath claws; the sheath clamping drive mechanism includes a top block supporting plate and a top block arranged on the top block supporting plate, the top block is correspondingly arranged below the sheath clamping unit, and the top block is provided with a support head capable of propping up the lower parts of the pair of sheath claws.

[0027] The beneficial effect of adopting the above further scheme is that the upper part of the sheath clamping jaws is the clamping position, and the upper parts of the pair of sheath clamping jaws are separated under the action of the clamping jaw spring, and will not interfere with the placement of the safety needle. After the safety needle is placed, the support head of the sheath clamping drive mechanism moves up and is inserted between the lower parts of the pair of sheath clamping jaws, which can separate the lower parts of the pair of sheath clamping jaws, and the upper parts of the sheath clamping jaws are close to the needle sheath to clamp the needle sheath of the safety needle.

[0028] Furthermore, the sheath clamping drive mechanism includes a driving top plate, the driving top plate is connected to one end of a connecting column, and the other end of the connecting column passes through the sheath claw frame and is connected to the top block support plate.

[0029] The beneficial effect of adopting the above-mentioned further scheme is that the clamping force on the needle sheath can act on the driving top plate, which drives the top plate to move up and drives the top block support plate to move, thereby realizing the upward drive of the support head, so that the support head can be inserted between the lower parts of a pair of sheath clamps, so that the lower part of the support head can separate the upper parts of the pair of sheath clamps and can hold the needle sheath tightly, and the power is transmitted to the top block by driving the top plate to realize the driving of the top block to move up and down.

[0030] Furthermore, the positioning structure includes a wing bracket for positioning the wing of the safety needle and a sheath notch for positioning the needle sheath of the safety needle.

[0031] The beneficial effect of adopting the above further scheme is that the wing bracket can support the wing of the safety needle and the needle handle around the wing. When the fixed pressure block of the fixed assembly acts on the needle handle and / or the wing to press the safety needle, the wing bracket can cooperate with the fixed pressure block of the fixed assembly to achieve stable positioning of the safety needle, and the sheath notch can support and position the needle sheath of the safety needle to meet the needs of tensile testing of the safety needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the safety needle of the present invention in a placement state;

[0033] Figure 2 It is a top view schematic diagram of the safety needle of the present invention in the placement state;

[0034] Figure 3 It is a three-dimensional structural schematic diagram of the safety needle of the present invention in a placement state;

[0035] Figure 4 It is a structural schematic diagram of the safety needle positioning state of the present invention;

[0036] Figure 5 It is a top view schematic diagram of the safety needle positioning state of the present invention;

[0037] Figure 6 It is a three-dimensional structural schematic diagram of the safety needle positioning state of the present invention;

[0038] Figure 7 It is a structural schematic diagram of the fixed pressing block of the fixed assembly of the present invention in the original position;

[0039] Figure 8 It is a structural schematic diagram of the matching state of the limit pin assembly and the movable track plate in the original position of the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure of the overhead and the latch of the present invention;

[0041] Fig.10 It is a structural schematic diagram of the fixed pressing block of the fixed assembly of the present invention in the pressing position;

[0042] Fig.11 It is a structural schematic diagram of the matching state of the limit pin assembly and the movable track plate in the pressing position of the present invention;

[0043] Fig.12 It is a structural schematic diagram of the shield transfer assembly of the present invention in the state of clamping the needle shield at angle one;

[0044] Fig.13 It is a structural schematic diagram of the sheath transfer assembly of the present invention in the second state of clamping the needle sheath;

[0045] Fig.14 It is a structural schematic diagram of the shield transfer assembly of the present invention in a state where the needle shield is released;

[0046] Fig.15 is a schematic diagram of the structure of a safety needle;

[0047] Fig.16 This is a schematic diagram of the structure of the safety needle when the outer sleeve is pulled out;

[0048] Fig.17 It is a schematic diagram of the split structure of the safety needle;

[0049] In the figure, 100, positioning frame; 101, fixed pressure block; 102, fixed frame; 103, fixed slide plate; 104, fixed bar; 105, movable track plate; 106, fixed track plate; 107, pin frame; 108, overhead; 109, latch; 110, pin slot; 111, latch spring; 112, overhead spring; 113, pin lever; 114, pin limiting ring; 115, pin slot; 116, first oblique slot hole; 117, second oblique slot hole; 118, first limiting column; 119, second limiting column; 120, sheath claw frame; 121, sheath clamping claw; 122, clamping claw spring; 123, top block support plate; 124, top block; 125, driving top plate; 126, connecting column; 127, wing bracket; 128, sheath notch; 129, tube positioning notch; 130, front baffle; 131, double-wing baffle; 132, shift fork; 133, main shaft; 134, first shift notch; 135, second shift notch; 136, driving block; 137, limit plate; Z00, safety needle; Z01, needle handle; Z02, first card slot; Z03, second card slot; Z04, wing;

[0050] Z05, inner sleeve; Z06, first buckle; Z07, third slot; Z08, fourth slot; Z09, outer sleeve; Z10, second buckle; Z11, needle sheath; Z12, catheter; Z13, needle holder; Z14, needle. DETAILED DESCRIPTION

[0051] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0052] like Figure 1-Figure 14As shown, a clamping and positioning device for tension detection of a safety needle comprises a positioning frame 100 and a fixing assembly arranged on the positioning frame 100, wherein the positioning frame 100 is provided with a positioning structure for positioning the safety needle Z00, and the fixing assembly can be used to compress the safety needle Z00 during tension detection;

[0053] The fixed assembly includes an assembly support portion and a fixed pressing block 101 arranged on the assembly support portion and capable of acting on the needle handle Z01 and / or the wing Z04 of the safety needle Z00. The fixed pressing block 101 has an original position and a pressing position. The fixed pressing block 101 in the original position can be moved to the upper side corresponding to the pressing position by moving in the front-back and left-right directions, and then moved to the pressing position by moving in the up-down directions to press the needle handle Z01 and / or the wing Z04 of the safety needle Z00; the fixed pressing block 101 in the pressing position can be moved out of the pressing position by an up-down action to release the safety needle Z00, and then returned to the original position by moving in the front-back and left-right directions.

[0054] The assembly support portion includes a fixed frame 102, a fixed slide 103, a fixed bar 104, a movable track plate 105 and a fixed track plate 106, the fixed frame 102 is arranged on the positioning frame 100 to slide up and down through a first slide rail, the fixed slide 103 is arranged on the fixed frame 102 to slide forward and backward through a guide column, the fixed bar 104 is arranged on the fixed slide 103 to slide left and right through a second slide rail, the fixed pressure block 101 is arranged on the fixed bar 104, the fixed track plate 106 is arranged on the fixed frame 102, and the movable track plate 105 is arranged on the fixed slide 103 to slide up and down through a third slide rail; a first linkage is provided between the movable track plate 105 and the fixed bar 104, a second linkage is provided between the movable track plate 105 and the fixed track plate 106, and a limit pin assembly that can be locked and unlocked with the movable track plate 105 is also provided on the fixed slide 103.

[0055] The fixed pressing block 101 moves from the original position to the clamping position, the movable track plate 105 moves downward, and under the action of the first linkage, the fixed bar 104 moves to the right, and under the action of the second linkage, the movable track plate 105 carries the fixed slide plate 103 forward. When the second linkage moves into place, the fixed pressing block 101 moves right and forward to the top of the clamping position. As the movable track plate 105 continues to move downward, the fixed track plate 106 moves downward to drive the fixed frame 102 to move downward, and the fixed pressing block 101 moves downward to the clamping position to clamp the safety needle Z00. After the fixed pressing block clamps the safety needle, the safety needle can be tested for tension. When in the clamping position, the limit pin assembly is locked with the movable track plate 105.

[0056] The fixed pressing block 101 returns to the original position from the pressing position, the movable track plate 105 moves up, and under the action of the limit pin assembly, the fixed slide plate 103 and the fixed frame 102 move up, and the fixed pressing block 101 releases the safety needle Z00 and moves up. As the movable track plate 105 continues to move up, the limit pin assembly and the movable track plate 105 are unlocked, and under the action of the first linkage, the fixed bar 104 moves to the left, and under the action of the second linkage, the movable track plate 105 moves backward with the fixed slide plate 103, and the fixed pressing block 101 moves left and back to the original position. After the fixed pressing block 101 returns to the original position, the safety needle after detection can be removed, and the safety needle to be detected can be loaded.

[0057] The limiting pin assembly includes a pin rack 107, an overhead 108 and a latch 109 movably arranged on the pin rack 107, the pin rack 107 is arranged on the fixed slide 103, a pin slot 110 is arranged on the movable track plate 105, a latch spring 111 is arranged between the latch 109 and the fixed slide 103, under the action of the latch spring 111, the free end of the latch 109 can act on the side of the movable track plate 105 or be inserted into the pin slot 110, a pin lever 113 is arranged on the latch 109, a pin groove 115 matched with the pin lever 113 is arranged at the lower part of the overhead 108, a pin limiting ring 114 is arranged at the upper part of the overhead 108, an overhead spring 112 is mounted on the overhead 108 between the pin limiting ring 114 and the pin rack 107, and a limiting plate 137 capable of positioning the pin limiting ring 114 is provided on the positioning frame 100. When the fixed pressing block 101 is in the clamping position, the latch pin 109 is inserted into the pin slot 110. When the fixed pressing block 101 needs to return to the original position from the clamping position, the limit pin assembly can ensure that the fixed pressing block 101 is first raised and then moves in the left and right and front and back directions, avoiding direct movement in the left and right and front and back directions that may damage the safety needle.

[0058] The pin frame 107 is provided with a pin hole, which is a stepped hole. The pin 109 is provided with a pin retaining ring, which cooperates with the shoulder of the stepped hole to limit the extension of the pin 109. The pin spring 111 is sleeved on the pin 109, one end of the pin spring 111 acts on the pin retaining ring, and the other end acts on the fixed slide 103. Under the action of the pin spring 111, the pin 109 can act on the side of the movable track plate 105, or extend into the pin slot 110 of the movable track plate 105. The shoulder can limit the pin retaining ring to prevent the pin 109 from being excessively extended under the action of the pin spring 111.

[0059] The first linkage member includes a first oblique slot hole 116 and a first limiting column 118 that can move in the first oblique slot hole 116. The first oblique slot hole 116 is arranged at the upper part of the movable track plate 105, and the first limiting column 118 is arranged on the fixed bar 104. The first oblique slot hole 116 is inclined rightward from bottom to top, and the first limiting column 118 can move in the first oblique slot hole 116. The first oblique slot hole 116 cooperates with the first limiting column 118. When the movable track plate 105 moves in the up-down direction, the fixed bar 104 carrying the fixed pressure block 101 can move in the left-right direction, so as to realize the power transmission from the up-down movement of the movable track plate 105 to the left-right movement of the fixed pressure block 101.

[0060] The second linkage member includes a second oblique slot hole 117 and a second limiting column 119 that can move in the second oblique slot hole 117. The second oblique slot hole 117 is arranged on the fixed track plate 106, and the second limiting column 119 is arranged at the lower part of the movable track plate 105. The second oblique slot hole 117 is inclined backward from bottom to top, and the plane where the fixed track plate 106 is located is perpendicular to the plane where the movable track plate 105 is located. The second limiting column 119 can move in the second oblique slot hole 117, and the second limiting column 119 cooperates with the second oblique slot hole 117. When the movable track plate 105 moves in the up and down directions, the movable track plate 105 can drive the fixed slide plate 103 to move in the front and back directions. In addition, when the second limiting column 119 reaches the front limit position of the second oblique slot hole 117, as the movable track plate 105 moves downward, it can also drive the fixed track plate 106 and the fixed frame 102 to move downward, so as to realize the downward movement of the fixed pressing block 101.

[0061] It also includes a shield transfer assembly that is slidably disposed on the positioning frame 100, and the shield transfer assembly can be used to clamp and transfer the needle shield Z11 of the safety needle Z00. The clamping and positioning device can not only compress the safety needle Z00 through the fixing assembly during the tension test, and prepare for positioning the safety needle for the tension test of the outer sleeve Z09 and the inner sleeve Z05 of the safety needle Z00, but also can use the shield transfer assembly to clamp the needle shield Z11 and move it forward a certain distance when the tension test is performed on the inner sleeve Z05, so as to avoid the needle shield Z11 interfering with the tension test of the inner sleeve Z05.

[0062] It also includes a fork mechanism, which includes a fork 132, which is rotatably arranged on the positioning frame 100 through a main shaft 133, and a first shifting notch 134 for driving the fixing assembly to press the safety needle Z00 is provided on one end of the fork 132, and a second shifting notch 135 for driving the sheath transfer assembly to clamp the needle sheath Z11 of the safety needle Z00 is provided on the other end of the fork 132. The fork 132 can be arranged on the main shaft 133, and the main shaft 133 is connected to the positioning frame 100 through a bearing or a sleeve. The first shifting slot 134 can cooperate with the movable track plate 105 of the fixed assembly, such as a track plate shifting shaft that cooperates with the first shifting slot 134 can be set on the movable track plate 105. When the first shifting slot 134 swings upward or downward, it can drive the movable track plate 105 of the fixed assembly to move up or down, thereby achieving the purpose of loosening the safety needle Z00 or tightening the safety needle Z00 of the fixed assembly; the second shifting slot 135 can cooperate with the sheath transfer assembly, such as driving the top plate 125 to cooperate with the second shifting slot 135. When the second shifting slot 135 swings downward or upward, the sheath transfer assembly can loosen the needle sheath Z11 or hold the needle sheath Z11; and the sliding sheath transfer assembly can slide back and forth relative to the positioning frame 100, and can move back and forth after holding the needle sheath Z11, so as to prepare for the forward movement of the needle sheath Z11 without interfering with the inner sleeve tension detection and the backward movement reset. The design of the fork mechanism can use a power to act on the sheath transfer assembly and the fixed assembly to simultaneously meet the needs of the fixed assembly to compress the needle handle Z01 and / or wing Z04 of the safety needle Z00 and the sheath transfer assembly to clamp and transfer the needle sheath Z11 of the safety needle Z00, thereby reducing the number of driving components, lowering costs, and facilitating the rotation of the clamping and positioning device between various workstations, thereby reducing the energy consumption of the rotation drive.

[0063] The sheath transfer assembly includes a sheath claw frame 120, a sheath transfer drive mechanism for driving the sheath claw frame 120 to move forward and backward, a sheath clamping unit arranged on the sheath claw frame 120, and a sheath clamping drive mechanism for driving the sheath clamping unit to open and close. The sheath claw frame 120 is arranged on the positioning frame 100 for sliding forward and backward through a guide rod. The sheath clamping unit clamps or releases the needle sheath Z11 under the action of the sheath clamping drive mechanism. The sheath claw frame 120 can drive the needle sheath Z11 to move forward or backward under the action of the sheath transfer drive mechanism.

[0064] The shield transfer drive mechanism includes a drive block 136 disposed on the shield claw frame 120. The shield claw frame 120 is moved forward and backward by driving the drive block 136 to move forward and backward. The forward and backward movement of the drive block 136 can be realized by transferring the driving cylinder, so that the shield clamping unit clamps the needle shield Z11 and drives the needle shield Z11 to move forward and backward.

[0065] The sheath clamping unit includes a pair of sheath clamping claws 121 located on both sides of the needle sheath Z11, the middle parts of the sheath clamping claws 121 are hinged on the sheath claw frame 120, and a clamping claw spring 122 is also provided between the upper parts of the pair of sheath clamping claws 121; the sheath clamping drive mechanism includes a top block supporting plate 123 and a top block 124 arranged on the top block supporting plate 123, the top block 124 is correspondingly arranged below the sheath clamping unit, and a support head is provided on the top block 124; the top block 124 can move upward to open the lower parts of the pair of sheath clamping claws 121 through the support head, and the upper parts of the sheath clamping claws 121 are closed to clamp the needle sheath Z11. The upper part of the sheath clamping jaws 121 is the clamping position. Under the action of the clamping jaw spring 122, the upper part of the pair of sheath clamping jaws 121 is open and will not interfere with the placement of the safety needle Z00. After the safety needle Z00 is placed, the support head of the sheath clamping drive mechanism moves up to act on the lower part of the pair of sheath clamping jaws 121, so that the lower part of the pair of sheath clamping jaws 121 is separated, and the upper part of the sheath clamping jaws 121 can hold the needle sheath Z11 tightly to clamp the needle sheath Z11 of the safety needle Z00.

[0066] The shield clamping drive mechanism includes a driving top plate 125, and the driving top plate 125 is connected to one end of a connecting column 126, and the other end of the connecting column 126 passes through the shield claw frame 120 and is connected to the top block supporting plate 123. The drive for clamping the needle shield Z11 can act on the driving top plate 125. When the driving top plate 125 is driven by power to move upward, the driving top plate 125 will drive the top block supporting plate 123 to move upward, thereby realizing the upward drive of the top block 124; when the needle shield Z11 needs to be released, the power drive moves away from the driving top plate 125, and the driving top plate 125 moves downward to drive the top block 124 to move downward away from the pair of shield clamping claws 121, and the upper part of the pair of shield clamping claws 121 is restored to the open state.

[0067] The positioning structure includes a wing bracket 127 for positioning the wing Z04 of the safety needle Z00 and a sheath notch 128 for positioning the needle sheath Z11 of the safety needle Z00. The wing bracket 127 can support the wing Z04 of the safety needle Z00 and the needle handle Z01 around the wing Z04. When the fixed pressing block 101 of the fixed assembly acts on the needle handle Z01 and / or the wing Z04 to press the safety needle Z00, the wing bracket 127 can cooperate with the fixed pressing block 101 to achieve stable positioning of the safety needle Z00, and the sheath notch 128 can support and position the needle sheath Z11 of the safety needle Z00, and can also ensure the accuracy of the clamping of the sheath clamp 121, meeting the requirements of the tension detection of the safety needle Z00.

[0068] The positioning structure also includes a tube positioning notch 129 for positioning the catheter Z12 of the safety needle Z00. The catheter is a hose, and the tube positioning notch 129 can position the catheter Z12 of the safety needle Z00 to prevent the catheter Z12 from interfering with the tension detection of the safety needle Z00. The positioning structure has multiple safety needles Z00 on the positioning frame 100, which can ensure that the safety needles Z00 are placed neatly, and the neat positioning of each safety needle Z00 will not interfere with each other, further improving the efficiency and quality of the tension detection of the safety needle Z00.

[0069] The positioning frame 100 also includes a front baffle 130 that can limit the forward movement of the needle shield Z11 of the safety needle Z00. When the inner sleeve Z05 is subjected to a tension test, the needle shield Z11 of the safety needle Z00 needs to be clamped and moved forward, but the forward movement distance cannot be excessive, otherwise the inner sleeve Z05 cannot be reset after the tension test. The front baffle 130 located in front of the safety needle Z00 can limit the forward movement distance of the needle shield Z11.

[0070] The positioning frame 100 also includes a double-wing baffle 131 for limiting the wing Z04 of the safety needle Z00, and an avoidance notch is provided on the double-wing baffle 131. The avoidance notch can avoid the outer sliding sleeve Z09 and the pull block to avoid interfering with the tension detection of the safety needle. The double-wing baffle 131 is located in front of the wing Z04 of the safety needle Z00 to ensure the positioning accuracy of the safety needle Z00 placed on the clamping and positioning device, which is conducive to accurate detection during subsequent tension detection.

[0071] The present invention can position and clamp the safety needle Z00 that is about to be tested for tension. For example, when the outer sleeve Z09 is tested for tension, the safety needle Z00 is placed on the positioning frame 100. At this time, the fixed pressing block 101 is in the original position, that is, on the left rear side of the wing Z04 of the safety needle Z00, and will not interfere with the placement of the safety needle Z00. The power drive can act on the driving top plate 125 to drive the top plate 125 to move upward. The support head of the top block 124 will be inserted into the lower part of the pair of sheath clamping claws 121 to open them. The upper part of the pair of sheath clamping claws 121 is close to the needle sheath Z11 of the safety needle Z00 and holds the needle sheath Z11 tightly, so as to achieve the clamping of the needle sheath Z11 of the safety needle Z00. When the driving top plate 125 moves upward, the support head of the top block 124 will be inserted into the lower part of the pair of sheath clamping claws 121 to open them. The upper part of the pair of sheath clamping claws 121 is close to the needle sheath Z11 of the safety needle Z00 and holds the needle sheath Z11 tightly, so as to achieve the clamping of the needle sheath Z11 of the safety needle Z00. At the same time, under the action of the shift fork 132, the movable track plate 105 of the fixed assembly moves downward at the same time. Since the first limiting column 118 on the fixed bar 104 cooperates with the first oblique slot hole 116 on the movable track plate 105, the fixed bar 104 carries the fixed pressure block 101 to move to the right. Since the second oblique slot hole 117 of the fixed track plate 106 cooperates with the second limiting column 119 on the movable track plate 105, and the fixed track plate 106 is installed on the fixed frame 102, the fixed frame 102 is set on the positioning frame 100 through the first slide rail, and the fixed frame 102 can only move up and down relative to the positioning frame 100 but not forward and backward, so the movable track plate 105 will also move forward. The track plate 105 is installed on the fixed slide plate 103 through the third slide rail, so it drives the fixed slide plate 103, the fixed bar 104 and the fixed pressure block 101 to move forward. When the second limiting column 119 of the movable track plate 105 moves to the front limit position of the second inclined slot hole 117, the fixed pressure block 101 moves to the upper side of the pressing position. The movable track plate 105 is restricted by the fixed track plate 106 and no longer moves forward. The movable track plate 105 can only move downward. As the movable track plate 105 moves downward, the fixed track plate 106 moves downward through the cooperation of the second limiting column 119 and the second inclined slot hole 117, driving the fixed frame 102 to move downward as a whole, so that the fixed pressure block 101 moves downward to the pressing position to press the wing of the safety needle Z00. At Z04, at this time, the latch 109 is inserted into the pin slot 110 under the action of the latch spring 111, and the limit pin assembly is locked with the movable track plate 105, the wing Z04 of the safety needle Z00 is compressed, and the sheath clamping claw 121 holds the needle sheath Z11 tightly, so that the safety needle Z00 located between the wing Z04 and the needle sheath Z11 can be tested for tension, such as the tension test of the outer sliding sleeve Z09 of the safety needle; when the tension test of the inner sliding sleeve of the safety needle is performed, the needle sheath Z11 needs to be moved forward to leave space for the inner sliding sleeve to be pulled out, and the sheath claw frame 120 can be driven forward by the power acting on the driving block 136, and the needle sheath Z11 will not hinder the tension test of the inner sliding sleeve Z05;After the tension test of the safety needle Z00 is completed, the top plate 125 is driven to reset, the top block 124 moves down, the support head detaches from the lower part of the sheath clamping jaw 121, the upper part of the sheath clamping jaw 121 opens under the action of the clamping jaw spring 122, and the sheath clamping jaw 121 resets to both sides of the needle sheath Z11. While driving the top plate 125 to move down and reset, under the action of the shift fork 132, the movable track plate 105 moves up. Since the latch 109 installed on the fixed slide plate 103 is plug-in matched with the pin slot 110, it can only drive the fixed slide plate 103 to move up, the fixed frame 102 moves up, and the fixed pressure block 101 leaves the clamping position. As the fixed slide plate 103 moves up, the top of the pin limiting ring 114 at the top of the overhead 108 contacts the limiting plate 137, and the overhead 108 compresses the overhead spring under the action of the limiting plate 137. 112 moves down, the pin push slot 115 moves down, as the overhead 108 moves down, the pin push rod 113 moves up out of the pin push slot 115, the latch pin 109 moves left and disengages from the pin slot 110 to act on the right side of the movable track plate 105, as the movable track plate 105 continues to move up, under the cooperation of the first oblique slot hole 116 and the first limiting column 118, the fixed bar 104 moves left with the fixed pressure block 101, under the cooperation of the second oblique slot hole 117 and the second limiting column 119, since the fixed track plate 106 is fixed on the fixed frame 102, the fixed frame 102 can only move up and down, so the movable track plate 105 not only moves up but also moves backward, driving the fixed slide plate 103 to move backward, the fixed bar 104 and the fixed pressure block 101 on the fixed slide plate 103 move backward, and the fixed pressure block 101 moves left and backward to its original position. The clamping and positioning device of the present invention can press the wing Z04 by the fixed pressing block 101 during the tension test, and can hold the needle sheath Z11 tightly and transfer the needle sheath Z11 by the sheath clamping claw 121, so as to meet the requirements of the safety needle tension test. The positioning of the safety needle Z00 during the tension test is stable, and the positioning process will not damage the safety needle Z00. When the safety needle Z00 is loaded and unloaded after the tension test, it will not hinder the taking and placing of the safety needle Z00, thus ensuring the quality and efficiency of the automated tension test of the safety needle Z00. ;

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamping and positioning device for safety needle tension detection, characterized in that: It comprises a positioning frame (100) and a fixing assembly arranged on the positioning frame (100), wherein the positioning frame (100) is provided with a positioning structure for positioning a safety needle (Z00), and the fixing assembly can press the safety needle (Z00); The fixed assembly comprises an assembly support portion and a fixed pressure block (101) arranged on the assembly support portion and capable of acting on the safety needle (Z00); the fixed pressure block (101) has an original position and a pressing position; the fixed pressure block (101) in the original position can be moved to the upper side of the corresponding pressing position by moving in the front-back and left-right directions, and then moved to the pressing position by moving in the up-down direction to press the safety needle (Z00); the fixed pressure block (101) in the pressing position can be moved out of the pressing position by moving in the up-down direction to release the safety needle (Z00), and then returned to the original position by moving in the front-back and left-right directions.

2. The clamping and positioning device for safety needle tension detection according to claim 1, characterized in that: The assembly support portion comprises a fixed frame (102), a fixed slide plate (103), a fixed bar (104), a movable track plate (105) and a fixed track plate (106); the fixed frame (102) is arranged on the positioning frame (100) to slide up and down; the fixed slide plate (103) is arranged on the fixed frame (102) to slide forward and backward; the fixed bar (104) is arranged on the fixed slide plate (103) to slide left and right; the fixed pressure block (101) is arranged on the fixed bar (104) ), the fixed track plate (106) is arranged on the fixed frame (102), and the movable track plate (105) is slidably arranged on the fixed slide plate (103) up and down; a first linkage is arranged between the movable track plate (105) and the fixed bar (104), a second linkage is arranged between the movable track plate (105) and the fixed track plate (106), and the fixed slide plate (103) is also provided with a limit pin assembly that can lock and unlock with the movable track plate (105).

3. The clamping and positioning device for safety needle tension detection according to claim 2, characterized in that: The limit pin assembly comprises a pin frame (107), a pin (108) movably arranged on the pin frame (107) and a latch (109); the pin frame (107) is arranged on the fixed slide plate (103); a pin slot (110) is arranged on the movable track plate (105); a latch spring (111) is arranged between the latch (109) and the fixed slide plate (103); under the action of the latch spring (111), the latch (109) can act on the side of the movable track plate (105) or be inserted into the movable track plate (105). In the pin slot (110), a pin lever (113) is provided on the latch pin (109), a pin slot (115) matching with the pin lever (113) is provided at the lower portion of the overhead pin (108), a pin limiting ring (114) is provided at the upper portion of the overhead pin (108), an overhead pin spring (112) is sleeved on the overhead pin (108) between the pin limiting ring (114) and the pin frame (107), and a limiting plate (137) capable of positioning the pin limiting ring (114) is provided on the positioning frame (100).

4. The clamping and positioning device for safety needle tension detection according to claim 2, characterized in that: The first linkage member comprises a first oblique slot hole (116) and a first limiting column (118) movable in the first oblique slot hole (116); the first oblique slot hole (116) is arranged on the movable track plate (105); and the first limiting column (118) is arranged on the fixing bar (104); And / or the second linkage member includes a second inclined slot hole (117) and a second limiting column (119) movable in the second inclined slot hole (117), the second inclined slot hole (117) being arranged on the fixed track plate (106), and the second limiting column (119) being arranged on the movable track plate (105).

5. The clamping and positioning device for safety needle tension detection according to any one of claims 1 to 4, characterized in that: It also includes a shield transfer assembly slidably arranged on the positioning frame (100), and the shield transfer assembly can be used to clamp and transfer the needle shield (Z11) of the safety needle (Z00).

6. The clamping and positioning device for safety needle tension detection according to claim 5, characterized in that: The invention also comprises a shift fork mechanism, wherein the shift fork mechanism comprises a shift fork (132), wherein the shift fork (132) is rotatably arranged on the positioning frame (100), wherein one end of the shift fork (132) is provided with a first shifting notch (134) capable of driving the fixing assembly to press the safety needle (Z00), and the other end of the shift fork (132) is provided with a second shifting notch (135) capable of driving the sheath transfer assembly to clamp the needle sheath (Z11) of the safety needle (Z00).

7. The clamping and positioning device for safety needle tension detection according to claim 5, characterized in that: The sheath transfer assembly comprises a sheath claw frame (120), a sheath transfer drive mechanism for driving the sheath claw frame (120) to move forward and backward, a sheath clamping unit arranged on the sheath claw frame (120), and a sheath clamping drive mechanism for driving the sheath clamping unit to open and close. The sheath claw frame (120) is slidably arranged on the positioning frame (100) forward and backward. The sheath clamping unit clamps or releases the needle sheath (Z11) under the action of the sheath clamping drive mechanism. The sheath claw frame (120) can drive the needle sheath (Z11) to move forward or backward under the action of the sheath transfer drive mechanism.

8. The clamping and positioning device for safety needle tension detection according to claim 7, characterized in that: The sheath clamping unit comprises a pair of sheath clamping claws (121) located on both sides of the needle sheath (Z11), the middle parts of the sheath clamping claws (121) are hinged on the sheath claw frame (120), and a clamping claw spring (122) is also provided between the upper parts of the pair of sheath clamping claws (121); the sheath clamping driving mechanism comprises a top block supporting plate (123) and a top block (124) arranged on the top block supporting plate (123), the top block (124) is correspondingly arranged below the sheath clamping unit, and the top block (124) is provided with a support head capable of propping up the lower parts of the pair of sheath clamping claws (121).

9. The clamping and positioning device for safety needle tension detection according to claim 8, characterized in that: The sheath clamping drive mechanism comprises a driving top plate (125), the driving top plate (125) and one end of a connecting column (126), and the other end of the connecting column (126) passes through the sheath claw frame (120) and is connected to the top block supporting plate (123).

10. The clamping and positioning device for safety needle tension detection according to any one of claims 1 to 4, characterized in that: The positioning structure comprises a wing bracket (127) at a wing (Z04) for positioning the safety needle (Z00) and a sheath notch (128) for positioning a needle sheath (Z11) of the safety needle (Z00).

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