Quick assembling and driving device for acetabular cup

Abstract

The invention discloses an acetabular cup fast assembling and driving device which comprises a special-shaped support, a transmission connecting rod mechanism, a head sleeve, a locking mechanism, a handle I and a handle II. One end of the middle rod is connected with the short rod through the universal joint sleeve and the universal joint, and the other end of the middle rod is connected with the long rod through the universal joint sleeve, the universal joint and the other universal joint sleeve; the middle rod and the long rod are in clearance fit with the two shaft sleeves I, and the two shaft sleeves I are rotatably fixed on the special-shaped support; the head of the short rod penetrates into an inner hole of the head of the special-shaped support and an unthreaded hole of the head sleeve and is limited by a gear step of the inner hole of the special-shaped support, and when the step of the short rod abuts against the gear step, the part, extending out of the head sleeve, of the head of the short rod is just the mounting position of the acetabular cup; one end of the locking mechanism is obliquely fixed on the long rod, and the other end of the locking mechanism is slidably and fixedly connected in an oblique sliding groove formed in the rear end of the special-shaped support in a lockable manner; a handle I is fixed to the rear end of the long rod. A handle II is fixed to the rear end of the special-shaped support. The acetabular cup can be accurately and quickly driven into a human body and can be withdrawn from the acetabular cup without clamping stagnation.

Description

Technical Field

[0001] The invention belongs to the technical field of medical device manufacturing and relates to a mortar cup quick-installing driving device. Background Art

[0002] Artificial hip replacement surgery is a treatment for patients with femoral head necrosis. After the necrotic femoral head is removed, the implant is implanted into the body, thereby alleviating the patient's pain and improving the patient's quality of life. During the operation, the acetabular cup is driven into the correct position of the acetabular wall through the acetabular cup driving device, and then the acetabular cup driving device is removed. Only when the acetabular cup driving device is easy to use can the acetabular cup be smoothly driven, and the operation can be carried out smoothly and as quickly as possible, thereby achieving a good effect of the operation. However, the existing acetabular cup driving device needs to rely on the doctor's experience and feeling to confirm the driving position during the operation. If the position is inaccurate, the acetabular cup driving device will become stuck due to the deformation of metal against metal, and cannot be removed normally, resulting in the operation not being able to proceed normally. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems existing in the prior art and to provide an acetabular quick-installation device, which can accurately and quickly insert the acetabular into the human body and withdraw it from the acetabular without getting stuck, thereby improving the accuracy and efficiency of the operation.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a quick-installation device for acetabular cup, comprising a special-shaped support, a transmission connecting rod mechanism, a head cover, a locking mechanism, a handle I and a handle II; The transmission connecting rod mechanism includes a short rod, a middle rod and a long rod; one end of the middle rod is connected to the short rod through a universal joint sleeve and a universal joint, and the other end is connected to the long rod through a universal joint sleeve, a universal joint and another universal joint sleeve; a shaft sleeve I is sleeved in the middle of the middle rod, and another shaft sleeve I is sleeved on the end of the long rod close to the short rod; the two shaft sleeves I are respectively matched with the middle rod and the long rod with clearance, and are respectively fixed on the special-shaped support through two pins with the same center axis; the head of the special-shaped support is a variable diameter cylinder with an inner hole, a gear step is provided in the inner hole, and a gear protrusion and thread are provided on the outer circle; the outer circle of the short rod head is provided with an external thread matching the inner thread of the mortar cup and a step matching the gear step of the inner hole of the special-shaped support; the head cover is provided with a light hole with a clearance matching the head of the short rod and a step inner hole with a threaded hole at the rear end, and the screw The groove is installed on the outer circle of the special-shaped support head and rests on the gear protrusion; the head of the short rod is inserted into the inner hole of the special-shaped support head and the light hole of the head cover and is limited by the gear step of the inner hole of the special-shaped support; one end of the locking mechanism is tilted and fixed on the long rod, and the other end can be slidably and lockably connected to the inclined sliding groove opened at the rear end of the special-shaped support; a handle Ⅰ is fixed to the rear end of the long rod, and a handle Ⅱ is fixed to the rear end of the special-shaped support; the locking mechanism is released, the handle Ⅰ is lifted, and the transmission connecting rod mechanism moves. When the step of the short rod rests on the gear step, the part where the head of the short rod extends out of the head cover is exactly the installation position of the mortar cup, the locking mechanism is locked, the transmission connecting rod mechanism no longer moves, the mortar cup is installed, and after it is driven into the human body, the handle Ⅰ is rotated and pressed down, the transmission connecting rod mechanism rotates and moves, and the short rod rotates out of the mortar cup.

[0005] Further preferably, the locking mechanism includes a special-shaped nail, a manual latch, a spring, a spring seat and a gasket; the manual latch is a one-way locking latch; the cap end of the special-shaped nail is provided with a mounting hole matching the long rod, and the lower end of the rod is provided with serrations; the special-shaped nail is inserted into the inclined sliding groove at the rear end of the special-shaped support; the shaft sleeve II is sleeved on the long rod through the shaft pad, the shaft pad and the long rod are clearance-matched, the shaft sleeve II and the shaft pad are respectively fixed to the cap end of the special-shaped nail through two pins with the same central axis; the special-shaped support is provided with a manual latch that intersects with the inclined sliding groove thereon The receiving hole has a spring base protruding from the receiving hole fixed in the receiving hole; the latch of the manual latch is placed in the receiving hole of the special-shaped support and is rotatably fixed to the special-shaped support by a pin, and the inclined handle protrudes from the receiving hole; the spring is placed on the spring base and the gasket fixed at the rear end of the latch of the manual latch; the manual latch is pressed, the latch rotates, and the spring is compressed and then separated from the serrations of the special-shaped nail, and the special-shaped nail can move in the inclined sliding groove of the special-shaped support, and the manual latch is released, the latch rotates in the opposite direction, and the latch is inserted into the serrations of the special-shaped nail under the action of the spring.

[0006] Further preferably, the special-shaped nail is provided with an upper limit and a lower limit, the upper limit is the end of the serrations at the upper end of the special-shaped nail, when the locking mechanism moves down to the upper limit, the short rod just retracts into the head cover; the lower limit is the glass bead screw installed on the serrations of the special-shaped nail, the pin of the manual latch of the locking mechanism disengages from the serrations of the special-shaped nail, the special-shaped nail moves up, and when it moves up to the highest position, the part where the head of the short rod protrudes from the head cover is exactly the installation position of the acetabulum, at this time, the glass bead screw has been disengaged from the inclined sliding groove of the special-shaped support and is located in the accommodating hole of the manual latch, the glass bead screw extends out and just supports the bottom end of the pin of the manual latch, the special-shaped nail no longer moves up, the manual latch is released, and the pin of the manual latch is inserted into the serrations of the special-shaped nail. At this time, after the acetabulum is installed, the acetabulum can be driven into the human body, which further increases the accuracy of the acetabulum installation and improves the accuracy of the surgery.

[0007] Further preferably, the outer end of the handle I is wrapped with an anti-skid pad; the outer end of the handle II is wrapped with an anti-skid layer and fixed with a tail cap, so as to prevent operation errors caused by hand slippage.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention limits the transmission connecting rod mechanism by the shaft sleeve I, the gear step of the special-shaped supporting head plays a positioning role, and the locking mechanism plays a role of locking the position, so that the transmission connecting rod mechanism can more accurately and stably deliver the acetabular cup into the human body, the lower limit of the locking mechanism plays a further positioning role on the special-shaped supporting head, and the multiple positioning mechanisms can better ensure the accurate and stable delivery of the acetabular cup, and the collision loss at each positioning point is minimized, thereby increasing the service life of each component. The short rod and the middle rod, and the middle rod and the long rod are all connected by universal joints. The middle rod and the long rod can rotate along their own central axis and slide along the two shaft sleeves I, and the shaft sleeves I can be rotated and fine-tuned along the pins fixed on the special-shaped support. These structures ensure that the short rod can be smoothly withdrawn from the acetabular cup without causing jamming. The upper limit set on the locking mechanism ensures that the middle rod stops retreating after retreating to a certain position, ensuring that the short rod can be retracted into the head cover and retreat the shortest distance, so as to reduce the wear between the various connecting parts during the movement and further increase the service life of each component. In short, the present invention can accurately and quickly insert the acetabular cup into the human body, and can withdraw from the acetabular cup without jamming, thereby improving the accuracy and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front cross-sectional schematic diagram of the present invention; Figure 2 for Figure 1 A-direction schematic diagram; Figure 3 It is a top view schematic diagram of the handle in the present invention. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0011] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment includes a special-shaped support 19, a transmission connecting rod mechanism, a head cover 2, a locking mechanism, a handle Ⅰ12 and a handle Ⅱ14. The transmission connecting rod mechanism includes a short rod 1, a middle rod 5 and a long rod 8. One end of the middle rod 5 is connected to the short rod 1 through a universal joint sleeve 3 connected by a pin 21 and a universal joint 4 connected by a pin 21, and the other end is connected to the long rod 8 through a universal joint sleeve 3 connected by a pin 21, a universal joint 4 connected by a pin 21 and another universal joint sleeve 3 connected by a pin 21. A shaft sleeve Ⅰ6 is sleeved in the middle of the middle rod 5, and another shaft sleeve Ⅰ6 is sleeved on the end of the long rod 8 close to the short rod 1. The two shaft sleeves Ⅰ6 are respectively clearance-matched with the middle rod 5 and the long rod 8, and are respectively fixed to the special-shaped support 19 through two pins 21 with the same central axis. The head of the special-shaped support 19 is a reducing cylinder with an inner hole, There is a stop step 28 in its inner hole, and a stop protrusion 27 and a thread on its outer circle. The outer circle of the head of the short rod 1 is provided with an outer thread matching the inner thread of the mortar cup and a step 29 matching the stop step 28 of the inner hole of the special-shaped support 19. The head cover 2 has a step inner hole with a light hole at the head that matches the clearance of the head of the short rod 1 and a threaded hole at the rear end. Its thread is installed on the outer circle of the head of the special-shaped support 19 and abuts against the stop protrusion 27. The head of the short rod 1 passes through the inner hole of the head of the special-shaped support 19 and the light hole of the head cover 2 and is limited by the stop step 28 of the inner hole of the special-shaped support 19. One end of the locking mechanism is tilted and fixed on the long rod 8, and the other end can be slidably and lockably connected to the inclined sliding groove opened at the rear end of the special-shaped support 19. A handle I12 is fixed at the rear end of the long rod 8, and a handle II14 is fixed at the rear end of the special-shaped support 19. Release the locking mechanism, lift the handle Ⅰ12, and the transmission link mechanism moves. When the step 29 of the short rod 1 is against the gear step 28, the head of the short rod 1 extends out of the head cover 2, which is exactly the installation position of the acetabulum. The locking mechanism is locked, and the transmission link mechanism no longer moves. After the acetabulum is installed and inserted into the human body, rotate the handle Ⅰ12 and press it down, the transmission link mechanism rotates and moves, and the short rod 1 rotates out of the acetabulum.

[0012] Preferably, the locking mechanism comprises a special-shaped nail 9, a manual latch 18, a spring 17, a spring seat 22 and a gasket 20. The manual latch 18 is a one-way locking latch. The cap end of the special-shaped nail 9 is provided with a mounting hole 25 matching the long rod 8, and the lower end of the rod is provided with a sawtooth 26. The special-shaped nail 9 is inserted into the inclined sliding groove at the rear end of the special-shaped support 19. The shaft sleeve II 10 is sleeved on the long rod 8 through the shaft pad 11, and the shaft pad 11 is clearance-matched with the long rod 8. The shaft sleeve II 10 and the shaft pad 11 are respectively fixed to the cap end of the special-shaped nail 9 through two pins 21 of the same central axis. The special-shaped support 19 is provided with a receiving hole for the manual latch 18 which is connected to the inclined sliding groove thereon, and a spring base 22 protruding from the receiving hole is fixed in the receiving hole. The latch of the manual latch 18 is placed in the receiving hole of the special-shaped support 19 and is rotatably fixed to the special-shaped support 19 by the pin 21, and the inclined handle protrudes from the receiving hole. The spring 17 is placed on the spring base 22 and the gasket 20 fixed to the rear end of the manual latch 18. The manual latch 18 is pressed, the latch rotates, and the spring 17 is compressed and then disengaged from the serrations 26 of the special-shaped nail 9, and the special-shaped nail 9 can move in the inclined sliding groove of the special-shaped support 1. The manual latch 18 is released, the latch rotates in the opposite direction, and the latch is inserted into the serrations 26 of the special-shaped nail 9 under the action of the spring 17.

[0013] Preferably, the special-shaped nail 9 is provided with an upper limit position and a lower limit position 27, the upper limit position is the end of the serrations at the upper end of the special-shaped nail 9, when the locking mechanism moves down to the upper limit position, the short rod 1 just retracts into the head cover 2; the lower limit position 27 is a glass bead screw installed on the serrations of the special-shaped nail 9, the pin of the manual latch 18 of the locking mechanism is disengaged from the serrations of the special-shaped nail 9, the special-shaped nail 9 moves up, and when it moves up to the highest position, the part where the head of the short rod 1 extends out of the head cover is exactly the installation position of the acetabulum, at this time, the glass bead screw has been disengaged from the inclined sliding groove of the special-shaped support and is located in the accommodating hole of the manual latch, the glass bead screw extends out and just supports the bottom end of the pin of the manual latch 18, the special-shaped nail 9 no longer moves up, the manual latch 18 is released, and the pin of the manual latch 18 is inserted into the serrations of the special-shaped nail 9, at this time, after the acetabulum is installed, the acetabulum can be driven into the human body, which further increases the accuracy of the acetabulum installation and improves the accuracy of the operation.

[0014] Preferably, the outer end of the handle I is wrapped with an anti-skid pad; the outer end of the handle II is wrapped with an anti-skid layer and fixed with a tail cap, so as to prevent operational errors caused by hand slippage.

[0015] Of course, the present invention has many other embodiments. Without violating the spirit and essence of the present invention, technicians familiar with the field can make corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should be regarded as improvements of equivalent technologies and belong to the protection scope of the claims of the present invention.

Claims

1. A quick-installation device for an acetabular cup, characterized in that: It includes a special-shaped support, a transmission connecting rod mechanism, a head cover, a locking mechanism, a handle I and a handle II; The transmission connecting rod mechanism includes a short rod, a middle rod and a long rod; one end of the middle rod is connected to the short rod through a universal joint sleeve and a universal joint, and the other end is connected to the long rod through a universal joint sleeve, a universal joint and another universal joint sleeve; a shaft sleeve I is sleeved in the middle of the middle rod, and another shaft sleeve I is sleeved on the end of the long rod close to the short rod; the two shaft sleeves I are respectively matched with the middle rod and the long rod with clearance, and are respectively fixed on the special-shaped support through two pins with the same center axis; the head of the special-shaped support is a variable diameter cylinder with an inner hole, a gear step is provided in the inner hole, and a gear protrusion and a thread are provided on the outer circle; the outer circle of the short rod head is provided with an external thread matching the inner thread of the mortar cup and a step matching the gear step of the inner hole of the special-shaped support; the head cover is provided with a light hole with a clearance matching the head of the short rod and a step inner hole with a threaded hole at the rear end, and the The thread is installed on the outer circle of the special-shaped support head and abuts against the gear protrusion; the head of the short rod is inserted into the inner hole of the special-shaped support head and the light hole of the head cover and is limited by the gear step of the inner hole of the special-shaped support; one end of the locking mechanism is tilted and fixed on the long rod, and the other end can be slidably and lockably connected to the inclined sliding groove opened at the rear end of the special-shaped support; a handle I is fixed to the rear end of the long rod, and a handle II is fixed to the rear end of the special-shaped support; the locking mechanism is released, the handle I is lifted, and the transmission connecting rod mechanism moves. When the step of the short rod abuts against the gear step, the part where the head of the short rod protrudes from the head cover is exactly the installation position of the mortar cup, the locking mechanism is locked, the transmission connecting rod mechanism no longer moves, the mortar cup is installed, and after it is driven into the human body, the handle I is rotated and pressed down, the transmission connecting rod mechanism rotates and moves, and the short rod rotates out of the mortar cup.

2. The acetabular cup quick-installation device according to claim 1, characterized in that: The locking mechanism includes a special-shaped nail, a manual latch, a spring, a spring seat and a gasket; the manual latch is a one-way locking latch; the cap end of the special-shaped nail is provided with a mounting hole matching the long rod, and the lower end of the rod is provided with saw teeth; the special-shaped nail is inserted into the inclined rear end of the special-shaped support The shaft sleeve II is sleeved on the long rod through the shaft pad, and the shaft pad and the long rod are matched with each other in a clearance, and the shaft sleeve II and the shaft pad are respectively fixed on the cap end of the special-shaped nail through two pins with the same central axis; the special-shaped support is provided with a receiving hole for the manual latch which is connected with the inclined sliding groove thereon, and a spring base which protrudes out of the receiving hole is fixed in the receiving hole; the latch of the manual latch is placed in the receiving hole of the special-shaped support and is rotatably fixed on the special-shaped support by the pin, and the inclined handle protrudes out of the receiving hole; the spring is placed on the spring base and the gasket fixed at the rear end of the latch of the manual latch; the manual latch is pressed, the latch rotates, and the spring is compressed and then separated from the serrations of the special-shaped nail, and the special-shaped nail can move in the inclined sliding groove of the special-shaped support, and the manual latch is released, the latch rotates in the opposite direction, and the latch is inserted into the serrations of the special-shaped nail under the action of the spring.

3. The acetabular cup quick-installation device according to claim 2, characterized in that: The special-shaped nail is provided with an upper limit and a lower limit, the upper limit is the end of the serrations at the upper end of the special-shaped nail, when the locking mechanism moves down to the upper limit, the short rod just retracts into the head cover; the lower limit is the glass bead screw installed on the serrations of the special-shaped nail, the pin of the manual latch of the locking mechanism is disengaged from the serrations of the special-shaped nail, the special-shaped nail moves up, and when it moves up to the highest position, the part where the head of the short rod protrudes from the head cover is exactly the installation position of the mortar cup, at this time, the glass bead screw has been disengaged from the inclined sliding groove of the special-shaped support and is located in the accommodating hole of the manual latch, the glass bead screw extends out and just supports the bottom end of the pin of the manual latch, the special-shaped nail no longer moves up, the manual latch is released, and the pin of the manual latch is inserted into the serrations of the special-shaped nail.

4. The acetabular cup quick-installation device according to claim 1, 2 or 3, characterized in that: The outer end of the handle I is wrapped with an anti-slip pad; the outer end of the handle II is wrapped with an anti-slip layer and is fixed with a tail cap.

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