CN215227631U

CN215227631U - Thighbone condyle measurer

Info

Publication number: CN215227631U
Application number: CN202120171507.9U
Authority: CN
Inventors: 陆光华; 林让横; 邱家建; 林旭; 李俊峰; 林志殊; 苏昭汴
Original assignee: Double Medical Technology Inc
Current assignee: Double Medical Technology Inc
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-12-21
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to a femoral condyle measuring device, which comprises a base, a swinging piece, a sliding piece, a pen needle and a locking mechanism, wherein the bottom of the swinging piece is provided with a first supporting leg and a second supporting leg; the swinging piece is pivoted to the lower part of the base through a rotating shaft so as to enable the swinging piece to rotate relative to the base; the sliding piece is sleeved on the upper part of the sliding rod, so that the sliding piece can slide on the sliding rod in the up-down direction, and the pen needle is horizontally connected to the top of the sliding rod in a sliding manner; the locking mechanism is configured to selectively restrict or allow rotation of the pendulum relative to the base to address limitations of current femoral parameter measurement and external rotation positioner external rotation angle selection, complex external rotation angle adjustment, and complex operation.

Description

Thighbone condyle measurer

Technical Field

The utility model relates to the field of medical equipment, specifically relate to a thighbone condyle caliber.

Background

The knee joint is one of the largest and most complex joints of the human body and is the most important joint in the process of human motion. The development of knee joint prosthesis systems has been in history for decades, and when a natural knee joint of a human body has lost partial or all functions due to pathological changes or injuries and the like, the natural knee joint prosthesis system needs to be adopted for replacement so as to rebuild the normal functions of the knee joint, reduce the pain and inconvenience of patients, achieve the optimal treatment effect by implementing the knee joint prosthesis system replacement, and can recover the mobility of the patients to the maximum extent.

In the knee replacement surgery, which is to replace a completely or partially damaged natural knee joint of a patient with a knee prosthesis, it is necessary to perform multi-plane and multi-angle osteotomy on the femoral side in order to install the femoral side prosthesis. Generally, an osteotomy is firstly carried out at the far end of the femur, then the parameter of the femoral condyle is measured by taking the osteotomy surface as a reference surface, and the position of the osteotomy module is determined in the next step. The measurement of the femoral condyle parameters is mainly to determine the spacing between the femoral posterior condyle and the femoral anterior curved surface so as to select the femoral prosthesis with the proper specification. The determination of the position of the osteotomy module is generally based on the femoral posterior condyle to determine the internal and external rotation angle and the anterior-posterior position of the osteotomy module, or based on the femoral anterior curvature.

In the prior art, the femur parameter measurement and external rotation positioner is generally divided into a left positioner and a right positioner, the left positioner is used for the left knee joint, the right positioner is used for the right knee joint, the operation is complex, the instrument cost is higher, and generally only part of limited fixed external rotation angles are provided for selection, such as 3 degrees or 5 degrees, the fixed external rotation angles hardly meet the personalized selection of the existing population, and great operation limitation is caused to the operation. Still other positioners, while providing more options for the degree of external rotation, increase the cost of the instrument, increase the number of surgical procedures, extend the time of the procedure, and increase the risk of the procedure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thighbone condyle caliber to solve current thighbone parameter measurement and the outward rotation angle of outward rotation locator and select limitation, outward rotation angular adjustment complicated and the complicated problem of operation.

The specific scheme is as follows:

a femoral condyle measurer comprising:

the top of the base is provided with a jack extending downwards, the bottom of a sliding rod is fixedly arranged in the jack, and the base is provided with a first scale mark positioned beside the sliding rod;

an oscillating piece having a base with a first leg and a second leg arranged to extend under a respective posterior condyle and rest on a femoral posterior condyle surface; the swinging piece is pivoted to the lower part of the base through a rotating shaft so as to enable the swinging piece to rotate relative to the base; the base is provided with a left scale mark and a right scale mark which are arranged corresponding to the first support leg and the second support leg, and the first support leg and the second support leg are provided with a first identification mark corresponding to the left scale mark or the right scale mark;

the sliding piece is sleeved on the upper part of the sliding rod so as to enable the sliding piece to slide on the sliding rod in the vertical direction, and a second identification line matched with the first scale mark on the base is arranged on the sliding piece;

the pen needle is horizontally connected to the top of the sliding rod in a sliding manner; and

a locking mechanism configured to selectively restrict or allow rotation of the pendulum relative to the base.

Furthermore, the locking mechanism comprises a positioning gear and an elastic piece which are sleeved on the rotating shaft, and the positioning gear is provided with a positioning disc, a base gear column and an extending part which are sequentially distributed; the base is provided with a through hole which is used for accommodating a gear column of the positioning gear and allowing the extending part to pass through, and the inner wall of the through hole is provided with a rack which is matched with the gear teeth of the gear column; the positioning gear is characterized in that a plurality of positioning columns are arranged on the surface, facing the back surface of the base, of the positioning disc of the positioning gear, positioning grooves matched with the positioning columns are formed in the back surface of the base, and the elastic piece generates elastic force for pushing the positioning disc of the positioning gear to the back surface of the base.

Furthermore, the positioning column is of a frustum structure with a small head and a large bottom.

Further, still fixed mounting has the ripples pearl screw on the swing, the spheroid of ripples pearl screw sets up towards the back of base, have on the back of base with the arc shrinkage pool that the spheroid phase-match of ripples pearl screw set up.

Furthermore, a knob is fixedly mounted on the extending part of the positioning gear.

Further, the pen needle marks a third scale line.

The utility model provides a thighbone condyle caliber compares with prior art has following advantage: the utility model provides a thighbone condyle caliber will control the thighbone parameter measurement of knee joint and the internal and external rotation locate function unites two into one to there is continuous internal and external rotation angle to choose the adjustment, very big having made things convenient for main treating doctor to measure thighbone parameter, select thighbone false body model and fix a position thighbone and cut the internal and external rotation angle of bone, improved operation efficiency.

Drawings

Fig. 1 shows an elevation view of a femoral condylar gauge.

Fig. 2 shows a cross-sectional view at a-a in fig. 1.

Fig. 3 shows a cross-sectional view at C-C in fig. 1.

Fig. 4 shows a schematic view of the base.

Figure 5 shows a schematic view of the pendulum.

Fig. 6 shows a schematic view of a pen needle.

Fig. 7 shows a schematic view of the positioning gear.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 7, the present embodiment provides a femoral condyle measuring instrument including a base 1, a swinging member 2, a sliding member 3, and a pen needle 4.

The top of the base 1 is provided with a jack 11 extending downwards, the bottom of a sliding rod 12 is inserted into the jack 11 and is fixedly installed in the jack 11, and the base 1 is provided with a first scale mark 13 located beside the sliding rod 12.

The base of the pendulum 2 has a first foot 21 and a second foot 22 arranged to extend below the respective posterior condyles and to rest on the surface of the femoral posterior condyles, the first foot 21 and the second foot 22 being intended to cradle the femoral posterior condyles and to measure the parameters of the femoral condyles with reference to the latter and to locate the internal and external rotation angles. The swinging member 2 is pivotally connected to the lower part of the base 1 by a pivot 20 so that the swinging member 2 can rotate relative to the base 1, the pivot 20 being located generally between the first leg 21 and the second leg 22. The base 1 is provided with a left scale mark 16 and a right scale mark 17 which are arranged corresponding to the first supporting leg 21 and the second supporting leg 22, and the first supporting leg 21 and the second supporting leg 22 are provided with a first identification mark 211 corresponding to the left scale mark 16 or the right scale mark 17, so that a user can judge the rotating angle of the swinging member 2 relative to the base 1 according to the position of the first identification mark 211 pointing to the left scale mark 16 or the right scale mark 17.

The sliding member 3 is sleeved on the upper portion of the sliding rod 12, so that the sliding member 3 can slide on the sliding rod 12 in the up-down direction, and the sliding member 3 has a second mark line 30 matched with the first scale line 13 on the base 1, so that a user can determine the specific position of the sliding member 3 according to the position of the second mark line 30 pointing to the first scale line 13.

The pen needle 4 is horizontally and slidably connected to the top of the sliding rod 12, and a third graduation line 40 corresponding to the femoral prosthesis with the corresponding specification model is marked on the pen needle 4, so that the corresponding femoral condyle specification can be conveniently selected.

A locking mechanism 5 is also included, the locking mechanism 5 being arranged to selectively restrict or allow rotation of the pendulum 2 relative to the base 1. The locking mechanism 5 includes a positioning gear 50 sleeved on the rotating shaft 20, and the positioning gear 50 has a positioning plate 501 facing the back of the base 1, a gear column 502 located in the through hole of the base 1, and an extending portion 503 extending out of the front of the base 1. The base 1 is provided with a through hole 14 for the gear column 502 of the positioning gear 50 and the extension part 503 to pass through, and the inner wall of the through hole 14 is provided with a rack 140 matched with the gear teeth of the gear column 502, so that the positioning gear 50 and the base 1 are meshed with each other through the gear set to realize the adjustment of the rotation angle of the swinging member 2, and the measurement is more accurate. A knob 51 is fixed on the extension 503, and the knob is located outside the front surface of the base 1, so that a user can conveniently drive the positioning gear 50 to drive the swinging member 2 to rotate relative to the base 1.

The face of positioning disk 501 towards the base back of positioning gear 50 is provided with a plurality of reference columns 5011, be provided with the constant head tank 15 that sets up with reference column 5011 phase-match on the back of base 1, after in the constant head tank 15 that corresponds is gone into to the card of reference column 5011, the locking of swinging member 2 is in on the base 1. In this embodiment, the locking mechanism 5 further includes an elastic member 52, the elastic member 52 in this embodiment is a spring, and the elastic member 52 generates an elastic force for the positioning gear 50 to push the positioning plate 501 to the back of the base, so that after the swinging member 2 rotates to a corresponding angle, the positioning post 5011 of the positioning gear 50 can be snapped into the positioning slot 15 of the base 1 by the elastic force of the spring to lock the swinging member 2.

The femoral condyle measuring device provided by the embodiment combines the femoral parameter measurement and internal and external rotation positioning functions of the left knee joint and the right knee joint, has continuous internal and external rotation angle selection and adjustment, is greatly convenient for an attending doctor to measure femoral parameters, select a femoral prosthesis model and position an internal and external rotation angle of femoral osteotomy, and improves the operation efficiency.

In this embodiment, the positioning post 5011 is a frustum structure with a small head and a large bottom, so that the positioning post 5011 and the positioning slot 15 only need to be fixed in a taper fit manner, and the gear post 502 of the positioning gear 50 only plays a role in transmission fit, so that the manufacturing tolerance can be enlarged on the premise of ensuring the transmission precision.

In this embodiment, the oscillating member 2 is further fixedly provided with a wave ball screw (also called wave screw, spring plunger) 53, the ball of the wave ball screw 53 is arranged towards the back of the base 1, the back of the base 1 is provided with an arc concave hole 18 matched with the ball of the wave ball screw 53, and in the process that the oscillating member 2 rotates relative to the base 1, the wave ball screw 53 is matched with the arc concave hole 18 to provide damping and gear feeling during rotation.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A femoral condyle measurer, comprising:

2. The femoral condylometer of claim 1, wherein: the locking mechanism comprises a positioning gear and an elastic piece which are sleeved on the rotating shaft, and the positioning gear is provided with a positioning disc, a base gear column and an extending part which are sequentially distributed; the base is provided with a through hole which is used for accommodating a gear column of the positioning gear and allowing the extending part to pass through, and the inner wall of the through hole is provided with a rack which is matched with the gear teeth of the gear column; the positioning gear is characterized in that a plurality of positioning columns are arranged on the surface, facing the back surface of the base, of the positioning disc of the positioning gear, positioning grooves matched with the positioning columns are formed in the back surface of the base, and the elastic piece generates elastic force for pushing the positioning disc of the positioning gear to the back surface of the base.

3. The femoral condylometer of claim 2 wherein: the positioning column is of a frustum structure with a small head and a large bottom.

4. The femoral condylometer of claim 2 wherein: still fixed mounting has the ripples pearl screw on the swing, the spheroid of ripples pearl screw sets up towards the back of base, have on the back of base with the arc shrinkage pool that the spheroid phase-match of ripples pearl screw set up.

5. The femoral condylometer of claim 2 wherein: and a knob is fixedly arranged on the extending part of the positioning gear.

6. The femoral condylometer of claim 1, wherein: and marking a third scale line on the pen needle.