A clamping positioning device for safety needle pull force detection

Abstract

The application relates to a clamping positioning device for safety needle tension detection, which comprises a positioning rack and a fixing assembly, the positioning rack is provided with a positioning structure, and the fixing assembly can be used for pressing the safety needle; the fixing assembly comprises an assembly support part and a fixing pressing block, the fixing pressing block has an original position and a pressing position, the fixing pressing block in the original position can be moved to the upper side of the corresponding pressing position through movement in the front-back and left-right directions, and then moved to the pressing position through movement in the up-down direction to press the safety needle; the fixing pressing block in the pressing position can be moved out of the pressing position through movement in the up-down direction, and then moved to the original position through movement in the front-back and left-right directions. The application has the advantages of simple and compact structure, convenient operation, avoidance of interference with the taking and placing of the safety needle during feeding and discharging, inactivity of the safety needle during tension detection and pressing of the safety needle, non-damage of the safety needle, preparation for automatic tension detection, and ensured quality of automatic tension detection of the safety needle.

Description

Technical Field

[0001] This invention relates to a clamping and positioning device for testing the tensile strength of safety pins, belonging to the field of safety pin testing technology. Background Technology

[0002] After use, most people simply discard medical needles such as injection needles, blood collection needles, medication preparation needles, and irrigation needles. Because traditional injection needles, blood collection needles, medication preparation needles, and irrigation needles lack safety protection devices, workers often suffer needle pricks during waste disposal and recycling, and there is also a risk of cross-infection. To address this, professionals have designed various safety needles with concealed needle tips after use to prevent harm to the human body. The sliding sleeve-protected safety needle is one such particularly convenient type.

[0003] The so-called sliding sleeve protective safety needle Z00 Figures 15-17 As shown, the device includes a needle handle Z01 and a needle Z14 inserted into the needle handle Z01. The needle handle Z01 connects the needle Z14 to one end of a catheter Z12. The needle handle Z01 has a wing Z04, and the other end of the catheter Z12 is connected to a needle holder Z13. It also includes an inner sliding sleeve Z05, an outer sliding sleeve Z09, and a needle sheath Z11, all fitted onto the needle handle Z01. The safety needle Z00 is shipped with the outer sliding sleeve Z09 and inner sliding sleeve Z05 sequentially fitted onto the base of the needle handle Z01, and the needle sheath Z11 fitted onto the head of the needle handle Z01 and protecting the needle Z14. During use, medical personnel can remove the sheath and use it like a regular needle. Before discarding it, medical personnel can simply pull the outer sliding sleeve Z09 to unfold the outer sliding sleeve Z09 and inner sliding sleeve Z05 sequentially, protecting the needle Z14. This prevents the needle Z14 from pricking workers during waste transfer and processing, hence the name safety needle Z00.

[0004] To prevent the inner sliding sleeve Z05 and outer sliding sleeve Z09 from sliding arbitrarily and affecting normal use, or from retracting under external force after being pulled open when discarded, thus exposing the needle tip Z14, locking mechanisms are required on the needle handle Z01, inner sliding sleeve Z05, and outer sliding sleeve Z09. These locking mechanisms include a first slot Z02 at the rear of the needle handle Z01, a second slot Z03 at the front of the needle handle Z01, a first latch Z06 at the rear of the inner sliding sleeve Z05, a third slot Z07 at the rear of the inner sliding sleeve Z05, a fourth slot Z08 at the front of the inner sliding sleeve Z05, and a second latch Z10 at the rear of the outer sliding sleeve Z09. In the factory-set state, the first slot Z02 and the first latch Z06, as well as the third slot Z07 and the second latch Z10, are engaged and locked, ensuring normal operation. When it is necessary to discard and pull it open, the first buckle Z06 and the second card slot Z03, the second buckle Z10 and the fourth card slot Z08 are respectively engaged and locked, and will not retract.

[0005] Because the inner and outer sliding sleeves and needle handle are generally made of plastic, their slots and buckles cannot guarantee a very precise fit. Furthermore, since the injection needle needs to be connected to adjacent components on the production line via adhesive application, the inner and outer sliding sleeves and needle handle may be too tightly fitted in their factory state. This makes it difficult for medical personnel to pull the sliding sleeve, failing to meet the environmental requirements for discarding safety needles. Therefore, it is crucial to control the sliding sleeve tension of each safety needle within the standard requirements. Whether this requirement is met requires a pull test, i.e., a tension test.

[0006] Currently, this inspection work relies on manual sampling, which has several drawbacks: firstly, it's inefficient and cannot comprehensively test the pins; secondly, the force applied lacks accurate standards and is based on intuition; and thirdly, the stroke is difficult to control, and once the pin reaches the locked position, it becomes unusable and irreparable. Since safety pins are disposable consumables used in large quantities, there is a need for efficient and accurate automated safety pin tensile testing equipment to replace manual sampling. The first step in automated testing is to achieve proper positioning of the safety pin. The clamping and positioning of the safety pin is the primary guarantee for automated testing; therefore, there is an urgent need for a clamping and positioning device for safety pin tensile testing that can stably position the safety pin and its stationary parts during tensile testing, meeting various clamping and positioning requirements. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a clamping and positioning device for detecting the tension of safety pins.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a clamping and positioning device for testing the tensile strength of a safety pin, comprising a positioning frame and a fixing assembly disposed on the positioning frame, wherein the positioning frame is provided with a positioning structure for positioning the safety pin, and the fixing assembly is capable of pressing the safety pin;

[0009] The fixing assembly includes an assembly support and a fixing block disposed on the assembly support and capable of acting on the needle handle and / or wing of the safety pin. The fixing block has an initial position and a clamping position. The fixing block in the initial position can move to above the corresponding clamping position by moving in the front-back and left-right directions, and then move to the clamping position by moving in the up-down direction to clamp the needle handle and / or wing of the safety pin. The fixing block in the clamping position can move out of the clamping position by moving in the up-down direction to release the safety pin, and then move back to the initial position by moving in the front-back and left-right directions.

[0010] The beneficial effects of this invention are as follows: When performing tensile testing on a safety pin, it is necessary to press the safety pin tightly to pull the outer or inner sliding sleeve. This clamping and positioning device is designed with a fixing assembly that can press the safety pin placed on the positioning frame and ensure that the pressing of the safety pin does not hinder its placement and removal on the positioning frame. For this purpose, the fixing block is provided with an initial position and a pressing position. When the fixing block is in the initial position, the safety pin can be placed on the positioning frame to await tensile testing, or the safety pin can be removed after tensile testing, without the fixing block interfering with the placement and removal of the safety pin; when the fixing block is in the pressing position... This invention effectively clamps the safety pin, facilitating tensile testing. To ensure the clamping effect of the fixing block, the movement of the fixing block to the clamping position has been improved. The fixing block in its original position first moves forward / backward and left / right, then moves up / down to descend and clamp the safety pin. The return movement of the fixing block to its original position is also limited: the fixing block in the clamping position first moves up / down to disengage from the safety pin, then moves forward / backward and left / right to return to its original position, preventing forced forward / backward or left / right movements from damaging the safety pin. This invention features a simple and compact structure, is easy to operate, avoids interference with the loading and unloading of safety pins, and clamps the stationary parts of the safety pin during tensile testing, preparing for automated tensile testing. The clamping and releasing of the safety pin will not damage it, ensuring the quality of automated tensile testing.

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

[0012] Furthermore, the assembly support includes a fixed frame, a fixed slide plate, a fixed strip, a movable track plate, and a fixed track plate. The fixed frame is slidably mounted on the positioning frame, the fixed slide plate is slidably mounted on the fixed frame, the fixed strip is slidably mounted on the fixed slide plate, the fixed pressure block is mounted on the fixed strip, the fixed track plate is mounted on the fixed frame, and the movable track plate is slidably mounted on the fixed slide plate. A first linkage is provided between the movable track plate and the fixed strip, and a second linkage is provided between the movable track plate and the fixed track plate. The fixed slide plate is also provided with a limit pin assembly that can lock and unlock with the movable track plate.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the fixed pressure block is set on the fixed strip, the fixed strip is slidably set on the fixed slide plate, the movable track plate is slidably set on the fixed slide plate, the fixed slide plate is slidably set on the fixed frame, the fixed track plate is set on the fixed frame, and the fixed frame is slidably set 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 components in the fixing assembly is set to meet the needs of the fixed pressure block changing positions 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 involves downward movement. Under the action of the first linkage, the fixing bar drives the fixing block to move to the right. Since the fixing frame is slidably mounted on the positioning frame, it does not move forward or backward. Simultaneously, under the action of the second linkage, the movable track plate moves forward. Because the movable track plate is slidably mounted on the fixed slide plate, the fixed slide plate carries the fixing bar and fixing block forward. When the movable track plate reaches its limit position where it cannot move forward further under the action of the second linkage, it stops moving forward due to the influence of the fixed track plate. The fixing block can then move to the right and forward to the pressing position. Above, the movable track plate moves downward, causing the fixed track plate to move downward as well. Since the fixed track plate is mounted on a fixed frame, which slides vertically on the positioning frame, the downward movement of the fixed frame causes the fixed pressure block to move downward to the clamping position, clamping the safety pin. When the fixed pressure block is in the clamping position, the limit pin assembly locks into the movable track plate. After the tensile test is completed, the fixed pressure block needs to return to its original position. The movable track plate moves upward under the power drive. Due to the locking relationship between the limit pin assembly and the movable track plate, the fixed sliding plate moves upward. The fixed sliding plate slides back and forth on the fixed frame, so the fixed frame... As the device moves upward, the fixed pressure block rises above the clamping position and disengages from the safety pin. The movable track plate continues to move upward, and the locking pin assembly and the movable track plate are released. After being released, the movable track plate moves to the left under the action of the first linkage component. Under the action of the second linkage component, and because the fixed track plate is set on the fixed frame, which can only slide up and down, the movable track plate moves backward, thereby driving the fixed slide plate, the fixed strip, and the fixed pressure block on the fixed strip to move backward. The fixed pressure block can be reset after moving left and backward. After that, the safety pin that has completed the tensile test can be discharged, and the safety pin to be tested can be loaded onto the positioning frame to wait for testing.

[0014] Furthermore, the limiting pin assembly includes a pin holder, a bushing movably mounted on the pin holder, and a pin. The pin holder is mounted on the fixed slide plate, and the movable track plate has a pin slot. A pin spring is provided between the pin and the fixed slide plate. Under the action of the pin spring, the free end of the pin can act on the side of the movable track plate or be inserted into the pin slot. The pin has a pin lever. The lower part of the bushing has a pin lever groove that cooperates with the pin lever. The upper part of the bushing has a pin limiting ring. A bushing spring is fitted on the bushing between the pin limiting ring and the pin holder. The positioning frame has a limiting plate that can limit the pin limiting ring.

[0015] The beneficial effect of adopting the above-mentioned further solution is that when the fixed block is in the clamping position, the pin is inserted into the pin slot. When the fixed block needs to return from the clamping position to the original position, the limit pin assembly can also ensure that the fixed block rises first, and then performs left-right and forward-backward movements. Specifically, during reset, the movable track plate moves upward under the power drive. Since the pin is inserted into the pin slot and the pin holder is fixedly installed on the fixed slide plate, which slides back and forth on the fixed frame, it will drive the fixed frame to move upward, and the fixed block will... First, move the needle handle and / or wing away from the safety needle upwards. As the pin holder moves upwards, the pin limit ring contacts the limit plate of the positioning frame. The pin is compressed by the force and moves downwards. The pin lever moves to the left, the pin spring is compressed, the pin disengages from the pin slot, and the fixed pressure block moves upwards to its position. As the movable track plate continues to move upwards, under the action of the first linkage, the fixed bar carries the fixed pressure block to the left. Under the action of the second linkage, the movable track plate drives the fixed slide plate to move backwards, and the fixed pressure block moves to the left and backwards. The fixed pressure block returns from the pressing position to its original position.

[0016] Furthermore, the first linkage includes a first inclined slot and a first limiting post that can move within the first inclined slot. The first inclined slot is disposed on the movable track plate, and the first limiting post is disposed on the fixed strip.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the first limiting post can move in the first inclined slot hole. Under the action of the first linkage, when the movable track plate moves in the up and down direction, the fixed pressure block can move in the left and right direction, 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 includes a second inclined slot and a second limiting post that can move within the second inclined slot. The second inclined slot is disposed on the fixed track plate, and the second limiting post is disposed on the movable track plate.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the second limiting post can move in the second inclined slot hole. Under the action of the second linkage, when the movable track plate moves up and down, the fixed pressure block can move in the front and back direction, 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 sheath transfer assembly that is slidably disposed on the positioning frame, the sheath transfer assembly being used to clamp and transfer the needle sheath of the safety needle.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the clamping and positioning device can not only press the safety pin with the fixing assembly during the tensile test, thus preparing the positioning safety pin for the tensile test of the outer and inner sliding sleeves of the safety pin, but also, when the tensile test of the inner sliding sleeve is performed, the needle sheath can be moved forward a certain distance by the sheath transfer assembly to avoid the needle sheath interfering with the tensile test of the inner sliding sleeve.

[0022] Furthermore, it also includes a shift fork mechanism, which includes a shift fork rotatably mounted on the positioning frame. One end of the shift fork is provided with a first shift groove that can drive the fixing assembly to press the safety pin, and the other end is provided with a second shift groove that can drive the sheath transfer assembly to clamp the needle sheath of the safety pin.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the drives of the fixed assembly and the sheath transfer assembly can be set separately, each with its own independent power drive. Of course, they can also be driven by a single power drive through the aforementioned shift fork mechanism. The first shift slot can cooperate with the movable track plate of the fixed assembly. A track plate shift shaft that cooperates with the first shift slot can be set on the movable track plate. When the first shift slot swings up or down, it can drive the movable track plate of the fixed assembly to move up or down, thereby achieving the purpose of the fixed assembly releasing or tightening the safety pin. The second shift slot can cooperate with the drive component of the sheath transfer assembly. For example, the second shift slot can cooperate with the drive top plate of the sheath transfer assembly. When the second shift slot swings down or up, the sheath transfer assembly can release or tighten the needle sheath. The design of the shift fork mechanism can simultaneously meet the needs of the fixed assembly for clamping the safety pin and the sheath transfer assembly for clamping and transferring the safety pin sheath with a single power source. This reduces the number of drive components, lowers costs, and facilitates the rotation of the clamping and positioning device between various workstations, reducing rotation drive energy consumption.

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

[0025] The beneficial effects of adopting the above-mentioned further solution are that, under the action of the sheath clamping drive mechanism, the sheath clamping unit can clamp or release the needle sheath of the safety needle; the sheath claw can move back and forth relative to the positioning frame under the action of the sheath transfer drive mechanism. After the sheath clamping unit clamps the needle sheath, it can drive the needle sheath to move forward, avoiding the needle sheath from interfering with the inner sliding sleeve of the safety needle being pulled out for tension detection. When reset is required, the sheath clamping unit can clamp the needle sheath and then move backward to achieve the reset of the needle sheath of the safety needle.

[0026] Furthermore, the sheath clamping unit includes a pair of sheath clamping claws located on both sides of the needle sheath, the middle part of the sheath clamping claws is hinged to the sheath clamping claw frame, and a clamping claw spring is also provided between the upper parts of the pair of sheath clamping claws; the sheath clamping drive mechanism includes a top block support plate and a top block disposed on the top block support plate, the top block is correspondingly disposed below the sheath clamping unit, and the top block is provided with a support head that can open the lower part of the pair of sheath clamping claws.

[0027] The beneficial effect of adopting the above-mentioned further solution is that the upper part of the sheath clamp is the clamping position, and the upper parts of the pair of sheath clamps are separated under the action of the clamp spring, which 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 inserts between the lower parts of the pair of sheath clamps, which can separate the lower parts of the pair of sheath clamps, and the upper parts of the sheath clamps can approach and clamp the needle sheath to achieve the clamping of the needle sheath of the safety needle.

[0028] Furthermore, the sheath clamping drive mechanism includes a drive top plate, one end of the drive top plate is connected to 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 solution is that the clamping force on the needle sheath can be applied to the drive top plate. The drive top plate moves upward, causing the top block support plate to move, thereby realizing the upward drive of the support head. This allows the support head to be inserted between the lower parts of a pair of sheath grippers, so that the lower part of the pair of sheath grippers can hold the needle sheath tightly. The drive top plate transmits power to the top block to drive the up and down movement of the top block.

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

[0031] The beneficial effect of adopting the above-mentioned further solution is that the wing bracket can support the wing of the safety needle and the needle shank around the wing. When the fixing block of the fixing assembly acts on the needle shank and / or wing to press the safety needle, the wing bracket can cooperate with the fixing block of the fixing assembly to achieve stable positioning of the safety needle. The sheath groove can support and position the needle sheath of the safety needle to meet the requirements of tensile testing of the safety needle. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention with the safety pin in place;

[0033] Figure 2 This is a top view schematic diagram of the safety pin placement state of the present invention;

[0034] Figure 3 This is a three-dimensional structural diagram of the safety pin placement state of the present invention;

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

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

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

[0038] Figure 7 This is a schematic diagram of the fixing block of the fixing assembly of the present invention in its original position;

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

[0040] Figure 9 This is a schematic diagram of the overhead and pin structure of the present invention;

[0041] Figure 10 This is a schematic diagram of the fixing block of the fixing assembly of the present invention in the clamping position.

[0042] Figure 11 This is a schematic diagram of the structure of the clamping position limit pin assembly and the movable track plate in the cooperation state of the present invention;

[0043] Figure 12 This is a schematic diagram of the structure of the sheath transfer assembly of the present invention, showing the sheath holding the needle at an angle one.

[0044] Figure 13 This is a schematic diagram of the structure of the sheath transfer assembly of the present invention, showing the sheath in state angle two.

[0045] Figure 14 This is a schematic diagram of the sheath transfer assembly of the present invention in the state of the sheath release pin.

[0046] Figure 15 This is a schematic diagram of the safety pin.

[0047] Figure 16 A schematic diagram of the structure of the safety pin with the outer sliding sleeve pulled out;

[0048] Figure 17 This is a schematic diagram of the split structure of a safety needle;

[0049] In the diagram, 100 is the positioning frame; 101 is the fixing block; 102 is the fixing frame; 103 is the fixing slide; 104 is the fixing strip; 105 is the movable track plate; 106 is the fixed track plate; 107 is the pin frame; 108 is the pin holder; 109 is the pin; 110 is the pin slot; 111 is the pin spring; 112 is the pin holder spring; 113 is the pin lever; 114 is the pin limit ring; 115 is the pin slot; 116 is the first inclined slot hole; 117 is the second inclined slot hole; 118 is the first limit post; 119 is the second limit post; and 120 is the protective claw frame. 121. Sheath gripper; 122. Gripper spring; 123. Top block support plate; 124. Top block; 125. Drive top plate; 126. Connecting column; 127. Wing bracket; 128. Sheath groove; 129. Tube positioning groove; 130. Front baffle; 131. Double wing baffle; 132. Shift fork; 133. Main shaft; 134. First shift groove; 135. Second shift groove; 136. Drive stop; 137. Limiting plate; Z00. Safety pin; Z01. Pin handle; Z02. First slot; Z03. Second slot; Z04. Wing;

[0050] Z05, Inner sliding sleeve; Z06, First buckle; Z07, Third slot; Z08, Fourth slot; Z09, Outer sliding sleeve; Z10, Second buckle; Z11, Needle sheath; Z12, Guide tube; Z13, Needle holder; Z14, Needle. Detailed Implementation

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

[0052] like Figures 1-14As shown, a clamping and positioning device for testing the tensile strength of a safety pin includes a positioning frame 100 and a fixing assembly disposed on the positioning frame 100. The positioning frame 100 is provided with a positioning structure for positioning a safety pin Z00. The fixing assembly can be used to press the safety pin Z00 during tensile testing.

[0053] The fixing assembly includes an assembly support and a fixing block 101 disposed on the assembly support and capable of acting on the needle handle Z01 and / or wing Z04 of the safety needle Z00. The fixing block 101 has an initial position and a pressing position. The fixing block 101 in the initial position can move to above the corresponding pressing position by moving in the front-back and left-right directions, and then move to the pressing position by moving in the up-down direction to press the needle handle Z01 and / or wing Z04 of the safety needle Z00. The fixing block 101 in the pressing position can move out of the pressing position by moving in the up-down direction to release the safety needle Z00, and then move back to the initial position by moving in the front-back and left-right directions.

[0054] The assembly support includes 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 slidably mounted on the positioning frame 100 via a first slide rail. The fixed slide plate 103 is slidably mounted on the fixed frame 102 via a guide post. The fixed bar 104 is slidably mounted on the fixed slide plate 103 via a second slide rail. The fixed pressure block 101 is mounted on the fixed bar 104. The fixed track plate 106 is mounted on the fixed frame 102. The movable track plate 105 is slidably mounted on the fixed slide plate 103 via a third slide rail. A first linkage is provided between the movable track plate 105 and the fixed bar 104, and a second linkage is provided between the movable track plate 105 and the fixed track plate 106. The fixed slide plate 103 is also provided with a limit pin assembly that can lock and unlock with the movable track plate 105.

[0055] The fixed pressure block 101 moves from its original displacement to the pressing position, the movable track plate 105 moves downward, and under the action of the first linkage, the fixing bar 104 moves to the right. 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 position, the fixed pressure block 101 moves to the right and forward above the pressing position. As the movable track plate 105 continues to move downward, the fixed track plate 106 moves downward, causing the fixing frame 102 to move downward. The fixed pressure block 101 moves downward to the pressing position to press the safety pin Z00. After the fixed pressure block presses the safety pin, the tension of the safety pin can be tested. When in the pressing position, the limit pin assembly is locked in place with the movable track plate 105.

[0056] The fixed pressure block 101 returns from the pressing position to its original position, the movable track plate 105 moves upward, and under the action of the limiting pin assembly, the fixed slide plate 103 and the fixing frame 102 move upward. The fixed pressure block 101 releases the safety pin Z00 and moves upward. As the movable track plate 105 continues to move upward, the limiting pin assembly is unlocked from the movable track plate 105. Under the action of the first linkage member, the fixing bar 104 moves to the left. Under the action of the second linkage member, the movable track plate 105 carries the fixed slide plate 103 and moves backward. The fixed pressure block 101 moves left and backward back to its original position. After the fixed pressure block 101 returns to its original position, the tested safety pin can be removed, and the safety pin to be tested can be loaded.

[0057] The limiting pin assembly includes a pin holder 107, a bushing 108 movably mounted on the pin holder 107, and a pin 109. The pin holder 107 is mounted on the fixed slide plate 103. The movable track plate 105 is provided with a pin slot 110. A pin spring 111 is provided between the pin 109 and the fixed slide plate 103. Under the action of the pin spring 111, the free end of the pin 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 provided on the pin 109. The lower part of the bushing 108 is provided with a pin lever groove 115 that cooperates with the pin lever 113. The upper part of the bushing 108 is provided with a pin limiting ring 114. A bushing spring 112 is fitted on the bushing 108 between the pin limiting ring 114 and the pin holder 107. The positioning frame 100 is provided with a limiting plate 137 that can limit the pin limiting ring 114. When the fixed pressure block 101 is in the clamping position, the pin 109 is inserted into the pin slot 110. When the fixed pressure block 101 needs to return from the clamping position to the original position, the limit pin assembly can ensure that the fixed pressure block 101 rises first and then moves in the left, right and forward and backward directions, so as to avoid damaging the safety pin if it moves directly in the left, right and forward and backward directions.

[0058] The pin holder 107 has a pin hole, which is a stepped hole. The pin 109 has a pin retaining ring, which engages with the shoulder of the stepped hole to limit the extension of the pin 109. A pin spring 111 is fitted onto 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 plate 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 and prevent the pin 109 from extending excessively under the action of the pin spring 111.

[0059] The first linkage includes a first inclined slot 116 and a first limiting post 118 that can move within the first inclined slot 116. The first inclined slot 116 is located on the upper part of the movable track plate 105, and the first limiting post 118 is located on the fixing bar 104. The first inclined slot 116 is inclined to the right from bottom to top, and the first limiting post 118 can move within the first inclined slot 116. The first inclined slot 116 and the first limiting post 118 cooperate, so that when the movable track plate 105 moves in the up and down direction, the fixing bar 104 carrying the fixing block 101 can move in the left and right direction, realizing the power transmission from the up and down movement of the movable track plate 105 to the left and right movement of the fixing block 101.

[0060] The second linkage includes a second inclined slot 117 and a second limiting post 119 movable within the second inclined slot 117. The second inclined slot 117 is disposed on the fixed track plate 106, and the second limiting post 119 is disposed at the lower part of the movable track plate 105. The second inclined slot 117 is inclined backward from bottom to top, and the plane of the fixed track plate 106 is perpendicular to the plane of the movable track plate 105. The second limiting post 119 can move within the second inclined slot 117. The second limiting post 119 cooperates with the second inclined slot 117, and when the movable track plate 105 moves up and down, the movable track plate 105 can drive the fixed slide plate 103 to move in the front and back direction. Furthermore, when the second limiting post 119 reaches the front limit position of the second inclined slot 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, realizing the downward movement of the fixed pressure block 101.

[0061] It also includes a sleeve transfer assembly that slides back and forth on the positioning frame 100. The sleeve transfer assembly can be used to clamp and transfer the needle sleeve Z11 of the safety needle Z00. This clamping and positioning device can not only press the safety needle Z00 with the fixing assembly during tensile testing to prepare for positioning the safety needle for tensile testing of the outer sliding sleeve Z09 and inner sliding sleeve Z05 of the safety needle Z00, but also, when performing tensile testing on the inner sliding sleeve Z05, use the sleeve transfer assembly to clamp the needle sleeve Z11 and move it forward a certain distance to avoid the needle sleeve Z11 interfering with the tensile testing of the inner sliding sleeve Z05.

[0062] The system also includes a shift fork mechanism, comprising a shift fork 132. The shift fork 132 is rotatably mounted on the positioning frame 100 via a main shaft 133. One end of the shift fork 132 has a first shift groove 134 for driving the fixing assembly to press the safety pin Z00, and the other end of the shift fork 132 has a second shift groove 135 for driving the sheath transfer assembly to clamp the needle sheath Z11 of the safety pin Z00. The shift fork 132 can be mounted on the main shaft 133, which is connected to the positioning frame 100 via bearings or bushings. The first slot 134 can cooperate with the movable track plate 105 of the fixed assembly. For example, the movable track plate 105 can be provided with a track plate pivot that cooperates with the first slot 134. When the first slot 134 swings up or down, it can drive the movable track plate 105 of the fixed assembly to move up or down, thereby achieving the purpose of the fixed assembly to release or tighten the safety needle Z00. The second slot 135 can cooperate with the sheath transfer assembly. For example, the drive top plate 125 cooperates with the second slot 135. When the second slot 135 swings down or up, the sheath transfer assembly can release or tighten the needle sheath Z11. The sliding sheath transfer assembly can slide back and forth relative to the positioning frame 100, so that it can move back and forth after tightening the needle sheath Z11, preparing for the forward movement of the needle sheath Z11 to not interfere with the inner sliding sleeve tension detection and the backward movement reset. The design of the shift fork mechanism can use a single power source to simultaneously satisfy the needs of the fixed assembly to press the needle handle Z01 and / or wing Z04 of the safety needle Z00, and the need of the sheath transfer assembly to clamp and transfer the needle sheath Z11 of the safety needle Z00. This reduces the number of driving components, lowers costs, and facilitates the rotation of the clamping and positioning device between various workstations, reducing rotation drive energy consumption.

[0063] The sheath transfer assembly includes a sheath claw 120, a sheath transfer drive mechanism for driving the sheath claw 120 to move back and forth, a sheath clamping unit disposed on the sheath claw 120, and a sheath clamping drive mechanism for driving the sheath clamping unit to open and close. The sheath claw 120 is slidably disposed on the positioning frame 100 via 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 120 can drive the needle sheath Z11 to move forward or backward under the action of the sheath transfer drive mechanism.

[0064] The sheath transfer drive mechanism includes a drive stop 136 disposed on the sheath claw holder 120. The sheath claw holder 120 moves back and forth by driving the drive stop 136. The back and forth movement of the drive stop 136 can be achieved by the action of the transfer drive cylinder, thereby enabling the sheath clamping unit to clamp the needle sheath Z11 and drive the needle sheath Z11 to move back and forth.

[0065] The sheath clamping unit includes a pair of sheath clamping claws 121 located on both sides of the needle sheath Z11. The middle part of the sheath clamping claws 121 is hinged to the sheath claw frame 120. 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 support plate 123 and a top block 124 disposed on the top block support plate 123. The top block 124 is correspondingly disposed below the sheath clamping unit. A support head is provided on the top block 124. The top block 124 can move upward to open the lower part of the pair of sheath clamping claws 121 through the support head. The upper part of the sheath clamping claws 121 can close to clamp the needle sheath Z11. The upper part of the sheath gripper 121 is the clamping position. Under the action of the gripper spring 122, the upper part of the pair of sheath grippers 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 and acts on the lower part of the pair of sheath grippers 121, so that the lower part of the pair of sheath grippers 121 is opened, and the upper part of the sheath gripper 121 can hold the needle sheath Z11 to achieve clamping of the needle sheath Z11 of the safety needle Z00.

[0066] The sheath clamping drive mechanism includes a drive top plate 125, one end of which is connected to a connecting post 126, and the other end of the connecting post 126 passes through the sheath claw frame 120 and is connected to the top block support plate 123. The clamping drive for the needle sheath Z11 can act on the drive top plate 125. When the drive top plate 125 is moved upward, it will drive the top block support plate 123 to move upward, thereby realizing the upward drive of the top block 124. When it is necessary to release the needle sheath Z11, the drive will move away from the drive top plate 125, and the downward movement of the drive top plate 125 will drive the top block 124 to move downward away from the pair of sheath clamping claws 121, and the upper part of the pair of sheath clamping claws 121 will return 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 groove 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 shank Z01 around the wing Z04. When the fixing block 101 of the fixing assembly acts on the needle shank Z01 and / or the wing Z04 to press the safety needle Z00, the wing bracket 127 can cooperate with the fixing block 101 to achieve stable positioning of the safety needle Z00. The sheath groove 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 gripper 121, meeting the requirements of tensile force detection of the safety needle Z00.

[0068] The positioning structure also includes a tube positioning slot 129 for positioning the conduit Z12 of the safety needle Z00. The conduit is a flexible tube, and the tube positioning slot 129 can position the conduit Z12 of the safety needle Z00, preventing the conduit Z12 from interfering with the tensile strength detection of the safety needle Z00. The positioning structure has multiple safety needles Z00 on the positioning frame 100, ensuring that the safety needles Z00 are placed neatly, and that the neat positioning of each safety needle Z00 does not interfere with each other, further improving the efficiency and quality of the tensile strength detection of the safety needle Z00.

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

[0070] The positioning frame 100 further includes a double-wing baffle 131 that limits the movement of the wing Z04 of the safety pin Z00. The double-wing baffle 131 has a clearance slot. The clearance slot can avoid the outer sliding sleeve Z09 and the pull block, thus avoiding interference with the tension detection of the safety pin. The double-wing baffle 131 is located in front of the wing Z04 of the safety pin Z00 to ensure the positioning accuracy of the safety pin Z00 placed on the clamping and positioning device, which is beneficial for accurate detection during subsequent tension testing.

[0071] This invention can position and clamp the safety pin Z00, which is about to undergo tensile testing. For example, when performing tensile testing on the outer sliding sleeve Z09, the safety pin Z00 is placed on the positioning frame 100. At this time, the fixing block 101 is in its original position, that is, on the left rear side of the wing Z04 of the safety pin Z00, and will not interfere with the placement of the safety pin Z00. The power drive can act on the drive top plate 125, and the drive top plate 125 moves upward. The support head of the top block 124 will insert into the lower part of the pair of sheath clamps 121 and open them. The upper part of the pair of sheath clamps 121 approaches the needle sheath Z11 of the safety pin Z00 and hugs the needle sheath Z11, thereby clamping the needle sheath Z11 of the safety pin Z00. The drive top plate 125 moves upward. Simultaneously, under the action of the shift fork 132, the movable track plate 105 of the fixed assembly moves downward. Because the first limiting post 118 on the fixing bar 104 engages with the first inclined slot 116 on the movable track plate 105, the fixing bar 104 carries the fixing block 101 to the right. Because the second inclined slot 117 on the fixed track plate 106 engages with the second limiting post 119 on the movable track plate 105, and because the fixed track plate 106 is mounted on the fixed frame 102, which is set on the positioning frame 100 via the first slide rail, the fixed frame 102 can only move up and down relative to the positioning frame 100 and cannot move forward and backward. Therefore, the movable track plate 105 will also move forward. The track plate 105 is mounted on the fixed slide plate 103 via the third slide rail, thus driving the fixed slide plate 103, the fixing strip 104, and the fixing block 101 forward. When the second limiting post 119 of the movable track plate 105 moves to the front limit position of the second inclined slot 117, the fixing block 101 moves above the pressing position. Restricted by the fixed track plate 106, the movable track plate 105 no longer moves forward and can only move downward. As the movable track plate 105 moves downward, the fixed track plate 106 moves downward along with it through the cooperation of the second limiting post 119 and the second inclined slot 117, driving the fixing frame 102 to move downward as a whole, thereby realizing that the fixing block 101 moves down to the pressing position to press the wing of the safety pin Z00. At Z04, the pin 109, under the action of the pin spring 111, is inserted into the pin slot 110 and locked with the limit pin assembly and the movable track plate 105. The wing Z04 of the safety pin Z00 is pressed, and the sheath claw 121 holds the needle sheath Z11. The tension of the safety pin Z00 located between the wing Z04 and the needle sheath Z11 can be tested, such as the tension of the outer sliding sleeve Z09 of the safety pin. When testing the tension of the inner sliding sleeve of the safety pin, the needle sheath Z11 needs to be moved forward to make room for the inner sliding sleeve to be pulled out. The sheath claw 120 can be moved forward by the power acting on the drive block 136. The needle sheath Z11 will not hinder the tension testing of the inner sliding sleeve Z05.After the tension test of the safety needle Z00 is completed, the drive top plate 125 is reset, the top block 124 moves down, the support head disengages from the lower part of the sheath clamp 121, and the upper part of the sheath clamp 121 opens under the action of the clamp spring 122. The sheath clamp 121 resets to both sides of the needle sheath Z11. At the same time as the drive top plate 125 moves down and resets, the movable track plate 105 moves up under the action of the shift fork 132. Since the pin 109 installed on the fixed slide plate 103 is inserted and engaged with the pin slot 110, it can only drive the fixed slide plate 103 to move up. The fixed bracket 102 moves up, and the fixed pressure block 101 leaves the pressing position. As the fixed slide plate 103 moves up, the top of the pin limit ring 114 on the top of the accessory 108 contacts the limit plate 137. Under the action of the limit plate 137, the accessory 108 compresses the accessory spring. As 112 moves downward, pin slot 115 moves downward. As accessory 108 moves downward, pin lever 113 moves upward out of pin slot 115. Insert pin 109 moves left and disengages from pin slot 110, acting on the right side of movable track plate 105. As movable track plate 105 continues to move upward, with the cooperation of first inclined slot hole 116 and first limiting post 118, fixing bar 104 moves left with fixing pressure block 101. With the cooperation of second inclined slot hole 117 and second limiting post 119, since fixed track plate 106 is fixed on fixed frame 102, fixed frame 102 can only move up and down. Therefore, movable track plate 105 moves backward in addition to moving upward, driving fixed slide plate 103 to move backward. Fixing bar 104 and fixing pressure block 101 on fixed slide plate 103 move backward, and fixing pressure block 101 moves left and backward to its original position. The clamping and positioning device of this invention can press the wing piece Z04 with the fixed pressure block 101 and hold the needle sheath Z11 with the sheath claw 121 during tensile testing, and can also transfer the needle sheath Z11, thus meeting the requirements of safety needle tensile testing. The positioning of the safety needle Z00 is stable during tensile testing, and the positioning process will not damage the safety needle Z00. Furthermore, it will not hinder the loading and unloading of the safety needle Z00 during loading and unloading after tensile testing, ensuring the quality and efficiency of automated tensile testing 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clamping positioning device for safety needle pull force detection, characterized in that, It includes a positioning frame (100) and a fixing assembly disposed on the positioning frame (100). The positioning frame (100) is provided with a positioning structure for positioning a safety pin (Z00), and the fixing assembly is capable of pressing the safety pin (Z00). The fixing assembly includes an assembly support and a fixing block (101) disposed on the assembly support and capable of acting on the safety pin (Z00). The fixing block (101) has an initial position and a pressing position. The fixing block (101) in the initial position can move to above the corresponding pressing position by moving in the front-back and left-right directions, and then move to the pressing position by moving in the up-down direction to press the safety pin (Z00). The fixing block (101) in the pressing position can move out of the pressing position by moving in the up-down direction to release the safety pin (Z00), and then move back to the initial position by moving in the front-back and left-right directions. The assembly support includes a fixed frame (102), a fixed slide plate (103), a fixing strip (104), a movable track plate (105), and a fixed track plate (106). The fixed frame (102) is slidably mounted on the positioning frame (100) vertically. The fixed slide plate (103) is slidably mounted on the fixed frame (102) front to back. The fixing strip (104) is slidably mounted on the fixed slide plate (103) left to right. The fixing block (101) is mounted on the fixing strip (104). On the fixed track plate (106), the fixed track plate (106) is set on the fixed frame (102), and the movable track plate (105) is slidably set on the fixed slide plate (103); a first linkage member is provided between the movable track plate (105) and the fixed strip (104), and a second linkage member is provided between the movable track plate (105) and the fixed track plate (106); the fixed slide plate (103) is also provided with a limit pin assembly that can lock and unlock with the movable track plate (105); The limiting pin assembly includes a pin holder (107), a bushing (108) movably mounted on the pin holder (107), and a pin (109). The pin holder (107) is mounted on the fixed slide plate (103). The movable track plate (105) is provided with a pin slot (110). A pin spring (111) is provided between the pin (109) and the fixed slide plate (103). Under the action of the pin spring (111), the pin (109) can act on the side of the movable track plate (105) or be inserted into it. Inside the pin slot (110), the pin (109) is provided with a pin lever (113), the lower part of the bracket (108) is provided with a pin groove (115) that cooperates with the pin lever (113), the upper part of the bracket (108) is provided with a pin limiting ring (114), a bracket spring (112) is fitted on the bracket (108) between the pin limiting ring (114) and the pin frame (107), and the positioning frame (100) is provided with a limiting plate (137) that can limit the pin limiting ring (114). The positioning structure includes a wing bracket (127) at the wing (Z04) for positioning the safety pin (Z00) and a sheath groove (128) for positioning the needle sheath (Z11) of the safety pin (Z00).

2. The chucking positioning device for safety needle pull force detection of claim 1, wherein, The first linkage includes a first inclined slot (116) and a first limiting post (118) that can move within the first inclined slot (116). The first inclined slot (116) is disposed on the movable track plate (105), and the first limiting post (118) is disposed on the fixing strip (104). And / or the second linkage includes a second inclined slot (117) and a second limiting post (119) that can move within the second inclined slot (117), the second inclined slot (117) being disposed on the fixed track plate (106) and the second limiting post (119) being disposed on the movable track plate (105).

3. The chucking positioning device for safety needle pull force detection of claim 1 or 2, wherein, It also includes a sheath transfer assembly that is slidably disposed on the positioning frame (100), the sheath transfer assembly being capable of holding and transferring the needle sheath (Z11) of the safety needle (Z00).

4. The chucking positioning device for safety needle pull force detection of claim 3, wherein, It also includes a shift fork mechanism, which includes a shift fork (132). The shift fork (132) is rotatably mounted on the positioning frame (100). One end of the shift fork (132) is provided with a first shift groove (134) that can drive the fixing assembly to press the safety needle (Z00), and the other end is provided with a second shift groove (135) that can drive the sheath transfer assembly to clamp the needle sheath (Z11) of the safety needle (Z00).

5. The chucking positioning device for safety needle pull force detection of claim 3, wherein, The sheath transfer assembly includes a sheath claw (120), a sheath transfer drive mechanism for driving the sheath claw (120) to move back and forth, a sheath clamping unit disposed on the sheath claw (120), and a sheath clamping drive mechanism for driving the sheath clamping unit to open and close. The sheath claw (120) is slidably disposed on the positioning frame (100). The sheath clamping unit clamps or releases the needle sheath (Z11) under the action of the sheath clamping drive mechanism. The sheath claw (120) can drive the needle sheath (Z11) to move forward or backward under the action of the sheath transfer drive mechanism.

6. The chucking positioning device for safety needle pull force detection of claim 5, wherein, The sheath clamping unit includes a pair of sheath clamps (121) located on both sides of the needle sheath (Z11). The middle part of the sheath clamps (121) is hinged to the sheath clamp holder (120). A clamp spring (122) is also provided between the upper parts of the pair of sheath clamps (121). The sheath clamping drive mechanism includes a top block support plate (123) and a top block (124) provided on the top block support plate (123). The top block (124) is correspondingly provided below the sheath clamping unit. The top block (124) is provided with a support head that can open the lower part of the pair of sheath clamps (121).

7. The chucking positioning device for safety needle pull force detection of claim 6, wherein, The sheath clamping drive mechanism includes a drive top plate (125), one end of the drive top plate (125) is connected to 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 support plate (123).

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