A pistol-style depth gauge

Abstract

The present application relates to a pistol-type depth gauge, belonging to the technical field of medical devices, which includes a depth gauge body and a sleeve slidably sleeved on the depth gauge body, the depth gauge body includes a ruler and a detection needle fixed to each other, the ruler and the detection needle are arranged in the same direction, a scale line is arranged on the ruler, a scale indicator block for reading the scale value is arranged at one end of the sleeve facing the ruler, a fixed rod is fixedly arranged on the sleeve, a depth measuring device is arranged between the fixed rod and the ruler, a driving rod is pivotally connected to the fixed rod, and the driving rod drives the depth measuring device to push the depth gauge body to move along the length direction of the sleeve. The present application has the effect of simple operation when measuring the depth of the bone hole, and medical staff can operate it with one hand.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a pistol-type depth gauge. Background Art

[0002] Currently in clinical trauma orthopedics, steel plates are usually used to fix the fracture site. Therefore, it is necessary to measure the depth of the bone hole at the fracture site in order to select screws of appropriate length to fix the bone plate. If the screws are too long or too short, it is difficult to achieve effective fixation of the bone plate.

[0003] At present, the measurement of bone hole depth is usually achieved by a simple measuring ruler. A Chinese patent with publication number CN209253162U discloses an orthopedic depth ruler, which includes a sleeve and a probe body, the sleeve and the probe body are sleeve-connected, the probe body passes through the sleeve and extends from both ends of the sleeve, and the surface of the sleeve in contact with the bone is set to a concave curved surface.

[0004] In the above-mentioned prior art, during fracture surgery, a hole is first drilled at the fracture site, and a suitable depth gauge is selected according to the fracture location. The contact surface of the sleeve is in contact with the bone plate. When the hook of the measuring rod hooks the contact surface of the sleeve, it is at position 0, and the scale line exposed at the first end of the sleeve shows a value of 0. One hand holds the sleeve and passes the hook through the bone, and the contact surface contacts one side of the bone. The other hand adjusts the extended length of the probe body until the hook hooks the bone, and then reads the scale line value exposed at the first end of the sleeve, which is the extended length of the hook. This length is the length between the bone plate and the bottom of the bone hole, which is the screw length value, and then the appropriate screw can be selected according to this length.

[0005] With respect to the above-mentioned related technologies, the inventor believes that there is a defect that when medical staff measure the screw depth, they need to use both hands at the same time, which is inconvenient and leads to a large error in the final measurement result. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present application is to provide a pistol-type depth gauge, which can be operated with one hand and is easy to operate.

[0007] The above application objectives of this application are achieved through the following technical solutions:

[0008] A pistol-type depth gauge comprises a depth gauge body and a sleeve slidably sleeved on the depth gauge body, the depth gauge body comprises a scale and a detection needle fixed to each other, the scale and the detection needle are arranged in the same direction, the scale is provided with scale lines, one end of the sleeve facing the scale is provided with a scale indicating block for reading the scale value, a fixing rod is fixedly provided on the sleeve, a depth measuring device is provided between the fixing rod and the scale, a driving rod is pivotally connected to the fixing rod, and the driving rod drives the depth measuring device to push the depth gauge body to move along the length direction of the sleeve.

[0009] By adopting the above technical solution, during fracture surgery, a hole is first drilled at the fracture site, and the medical staff holds the fixing rod with one hand, and puts the sleeve against the bone plate, which is the 0 position. At this time, the scale line exposed on the scale indicator block shows the value of 0. Then use the hand holding the fixing rod to operate the driving rod, and extend the detection needle into the hole drilled on the fracture through the depth measuring device. When the detection needle extends into the bottom of the hole, observe the scale indicated by the scale indicator block. This length is the length between the bone plate and the bottom of the bone hole, which is the screw length value. Then, the appropriate screw can be selected according to this length. When measuring the depth of the bone hole, the medical staff can operate it with one hand, which is simple to operate.

[0010] Preferably, the depth sounding device comprises a pushing assembly, and the pushing assembly comprises a pushing block and a pushing rod;

[0011] One end of the pushing block is clamped with the scale, and the other end of the pushing block is hinged with the fixing rod;

[0012] The push rod is slidably sleeved on the end of the driving rod facing the scale, one end of the push rod is fixedly connected to the push block, and a support spring is arranged between the other end of the push rod and the fixed rod.

[0013] By adopting the above technical solution, when measuring the depth of the bone hole, the medical staff holds the fixed rod and controls the driving rod with their fingers so that the driving rod can swing around the pivoted axis. When the driving rod swings toward the fixed rod, the end of the driving rod facing the ruler will swing toward the push block, and the push block can be pushed toward the bone hole. Since the push block and the ruler are mutually engaged, the push block can drive the ruler to move while the push block moves, and the ruler drives the detection needle to move, so that the detection needle can be inserted into the bone hole.

[0014] The setting of the support spring enables the push block and the ruler to be reliably connected, so that the push block can push the ruler to move. When the detection needle needs to be reset, the push rod is driven to rotate the push block around the hinge between the push block and the drive rod, and the push block is disconnected from the ruler, so that the medical staff can manually reset the ruler.

[0015] Preferably, a limit spring is arranged between the fixing rod and the driving rod, and a limit ring is hingedly connected to the end of the driving rod facing the scale, and the limit ring is sleeved on the scale.

[0016] By adopting the above technical solution, the setting of the limit ring can, on the one hand, limit the scale, reduce the shaking of the scale during movement, and enable the scale to move horizontally. On the other hand, when the driving rod swings toward the fixed rod, the driving rod can drive the limit ring to swing toward the detection needle, and the push block can push the scale toward the detection needle. When the driving rod continues to move toward the fixed rod, the limit ring can raise and position the scale, so that the push block and the scale are disconnected. Then, when the driving rod swings in the opposite direction, the push block will be engaged with the scale, and then the swinging steps of the driving rod are repeated to continuously move the scale toward the detection needle.

[0017] The setting of the limit spring can facilitate the reset of the driving rod, that is, after the driving rod swings toward the fixed rod, it automatically resets and swings away from the fixed rod, so that the push block and the scale are mutually engaged.

[0018] Preferably, the depth measuring device further comprises a reset assembly, the reset assembly comprising a reset spring and a first limit block and a second limit block located at both ends of the reset spring, the first limit block being fixed between the scale and the detection needle, and the second limit block being slidably sleeved in the length direction of the detection needle;

[0019] One end of the sleeve away from the fixing rod is threadedly connected with a fixing ring for limiting the second limiting block, and the fixing ring is sleeved in the length direction of the detection needle.

[0020] By adopting the above technical solution, when measuring the depth of the bone hole, the ruler moves in the direction of the detection needle, the reset spring will be compressed, and when the ruler is reset, when the push block and the ruler are disengaged, the reset spring can push the first limit block to move in the direction of the ruler through its own rebound force, thereby resetting the ruler.

[0021] The setting of the fixing ring can limit the position of the second limiting block, so that the second limiting block can cooperate with the first limiting block to limit the reset spring.

[0022] Preferably, a guide rod is extended on one side of the first limit block toward the second limit block, and the return spring is sleeved on the guide rod.

[0023] By adopting the above technical solution, the setting of the guide rod can, on the one hand, facilitate the limiting of the reset spring. If the guide rod is not provided, the limit spring is easy to be disconnected from the detection needle. On the other hand, the guide rod can limit the compression direction of the spring, so that the reset spring is not easy to be entangled when it is compressed.

[0024] Preferably, a bumping ball is provided on the first limiting block, and the bumping ball is slidably connected to the inner wall of the sleeve.

[0025] By adopting the above technical solution, when measuring the depth of the bone hole, the ruler moves in the direction of the detection needle, and the first limit block will generate sliding friction with the inner wall of the sleeve, buffering the rebound force of the reset spring, slowing down the sliding speed between the sleeve and the limit block, thereby slowing down the reset speed of the ruler.

[0026] Preferably, a fixing hook is provided at the end of the detection needle.

[0027] By adopting the above technical solution and setting the fixed hook, it is convenient for the detection needle to hook the bone through the fixed hook during measurement, and then observe the scale line to improve the measurement accuracy.

[0028] Preferably, a side of the scale indicating block away from the fixing hook is arranged as an inclined surface, and the inclined surface is arranged to be inclined in the direction of the scale line.

[0029] By adopting the above technical solution and setting the inclined surface, it is possible to easily align the scale lines and the scale indicator block for easy observation, thereby reducing errors caused by different angles for reading the scale lines.

[0030] Preferably, a limiting column is extended from a side of the second limiting block away from the first limiting block, and the limiting column is penetrated through one end of the fixing ring toward the fixing hook.

[0031] By adopting the above technical solution, when measuring the depth of the bone hole, the limit column is inserted into the screw hole of the bone plate, and then the bone hole is measured, so as to facilitate the reliable connection between the sleeve and the bone plate and the measurement of the bone hole.

[0032] Preferably, a plurality of latch teeth are arranged on one side of the ruler facing the pushing block, and an end of the pushing block facing the ruler is meshed with the latch teeth.

[0033] By adopting the above technical solution and the setting of the latch teeth, it is possible to facilitate the pushing of the ruler by the pushing block.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. Through the setting of the fixing rod, the driving rod and the depth measuring device, when measuring the depth of the bone hole, the medical staff can operate it with one hand, which can achieve the effect of simple operation;

[0036] 2. The setting of the limit ring can facilitate the advancement and resetting of the scale;

[0037] 3. The setting of the scale indicator block and the inclined surface can reduce the reading deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a three-dimensional diagram of a pistol-type depth gauge according to an embodiment of the present application.

[0039] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0040] Figure 3 It is a partial cross-sectional structural schematic diagram of the present embodiment for illustrating the internal structure of the reset assembly.

[0041] Figure 4 yes Figure 3 Schematic diagram of the enlarged portion B.

[0042] Figure 5 yes Figure 3 Enlarged schematic diagram of part C.

[0043] In the figure, 1. depth gauge body; 11. scale; 111. latch; 12. detection needle; 121. fixing hook; 13. scale line; 2. casing; 21. scale indicator block; 211. inclined plane; 212. observation slot; 3. fixing rod; 31. mounting hole; 4. driving rod; 5. depth measuring device; 51. pushing assembly; 511. pushing block; 512. pushing rod; 513. limiting hole; 52. reset assembly; 521. reset spring; 522. first limiting block; 523. second limiting block; 524. fixing ring; 525. guide rod; 526. limiting column; 6. supporting spring; 7. limiting spring; 8. limiting ring; 9. bead. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-5 This application is described in further detail.

[0045] The present application discloses a pistol-type depth gauge, referring to Figure 1 and Figure 2, comprising a depth gauge body 1, a sleeve 2 slidably sleeved on the depth gauge body 1, a fixing rod 3 fixedly connected to the sleeve 2, and a driving rod 4 pivotally connected to the fixing rod 3. A mounting hole 31 is provided on the fixing rod 3, the driving rod 4 is inserted into the mounting hole 31, and the driving rod 4 is hinged to the side wall of the mounting hole 31. The depth gauge body 1 comprises a scale 11 and a detection needle 12 connected to each other, a scale line 13 is provided on the scale 11, a plurality of latch teeth 111 are provided on the side of the scale 11 facing the push block 511, and a fixing hook 121 is provided at the end of the detection needle 12 away from the scale 11. When measuring the depth of the bone hole, the fixing hook 121 is hooked on the bone and the scale of the scale 11 is observed. The end of the sleeve 2 facing the ruler 11 is integrally provided with a scale indicator block 21, and the side of the scale indicator block 21 facing away from the probe needle 12 is provided with an inclined surface 211, and the inclined surface 211 is inclined in the direction of the scale line 13, and an observation slot 212 is provided on the inclined surface 211 to facilitate reading of the scale number. When reading the scale on the ruler 11, the user can align the end of the indicator block away from the probe needle 12 with the scale line 13, and the scale line 13 at this position is read, which is the measured length.

[0046] Reference Figure 2 and Figure 3 A depth measuring device 5 is arranged between the fixed rod 3 and the scale 11. The depth measuring device 5 includes a push assembly 51 and a reset assembly 52. ​​The push assembly 51 is arranged at a position of the scale 11 away from the detection needle 12, and the reset assembly 52 is located at the connection between the scale 11 and the detection needle 12. The push assembly 51 includes a push block 511 and a push rod 512. One end of the push block 511 is engaged with the latching teeth 111 on the scale 11, and the other end of the push block 511 extends into the mounting hole 31 and is hinged to the two side walls of the mounting hole 31. The push block 511 is located on the side of the mounting hole 31 close to the detection needle 12. One end of the push rod 512 is fixedly connected to the push block 511, and a support spring 6 is arranged between the other end of the push rod 512 and the fixed rod 3, so that the push block 511 and the scale 11 can be reliably engaged. A limit hole 513 is provided on the push rod 512, and one end of the driving rod 4 facing the scale 11 is inserted into the limit hole 513, and one end of the driving rod 4 extending out of the limit hole 513 is hinged to a limit ring 8, and the limit ring 8 is sleeved on the scale 11. A limit spring 7 is provided between the fixed rod 3 and the driving rod 4, and the support spring 6 and the limit spring 7 are respectively located on both sides of the connection between the fixed rod 3 and the driving rod 4.

[0047] Reference Figure 3When measuring the depth of the bone hole, the medical staff operates the driving rod 4 to swing around the pivoted axis. When the driving rod 4 swings toward the fixed rod 3, the end of the driving rod 4 extending out of the mounting slot 31 swings toward the push block 511, and the push block 511 can be pushed toward the bone hole. Since the push block 511 and the scale 11 are mutually engaged, the push block 511 can drive the scale 11 to move while the push block 511 moves. During the continuous movement of the driving rod 4 toward the fixed rod 3, the limit ring 8 can raise and position the scale 11, so that the push block 511 and the scale 11 are disconnected. Then, when the driving rod 4 swings in the opposite direction, the limit spring 7 automatically resets the driving rod 4, so that the driving rod 4 swings in the direction away from the fixed rod 3, and the push block 511 and the scale 11 are mutually engaged. Then, the swinging step of the driving rod 4 is repeated, and the scale 11 can be continuously moved toward the direction of the detection needle 12.

[0048] Reference Figure 4 and Figure 5 The reset assembly 52 includes a reset spring 521 and a first limit block 522 and a second limit block 523 located at both ends of the reset spring 521. A guide rod 525 is extended from the first limit block 522 toward the second limit block 523, and the end of the probe needle 12 facing the scale 11 is fixedly connected to the guide rod 525. The reset spring 521 is sleeved on the guide rod 525. A limit column 526 is extended from the second limit block 523 away from the first limit block 522. A fixing ring 524 is sleeved on the limit column 526. The fixing ring 524 is threadedly connected to the end of the sleeve 2 away from the fixing rod 3. The reset spring 521 is limited by the first limit block 522 and the second limit block 523. The second limit block 523 is limited by the connection between the fixing ring 524 and the sleeve 2, thereby further limiting the reset spring 521.

[0049] When resetting is performed by the reset spring 521, in order to reduce the reset speed of the reset spring 521, a ball 9 is provided on the first limit block 522. The ball 9 is slidably connected to the inner wall of the sleeve 2. The ball 9 buffers the rebound force of the reset spring 521, thereby slowing down the sliding speed between the sleeve 2 and the limit block, thereby slowing down the reset speed of the scale 11.

[0050] The implementation principle of this embodiment is: during the fracture surgery, a hole is first drilled at the fracture site. When measuring the depth of the bone hole, first, the medical staff holds the fixing rod 3 with their hands, and the end of the fixing ring 524 away from the sleeve 2 is against the bone plate, that is, the 0 position. At this time, the scale line 13 exposed on the scale indicator block 21 shows a value of 0. Secondly, the driving rod 4 is controlled by the finger to compress and release the limit spring 7. When the driving rod 4 applies pressure to the limit spring 7, the driving rod 4 swings around the pivot axis toward the fixing rod 3. When the driving rod 4 swings toward the fixing rod 3, the end of the driving rod 4 that passes through the mounting hole 31 will swing toward the push block 511. The limit ring 8 can raise the scale 11 and support the scale 11, so that the push block 511 is disconnected from the scale 11. Then release the limit spring 7, that is, the driving rod 4 is automatically reset by the resilience of the limit spring 7, and the driving rod 4 swings in the direction away from the fixing rod 3. At this time, the scale 11 does not move, and the limit ring 8 moves in the direction away from the detection needle 12, so that the push block 511 and the corresponding tooth 111 of the scale 11 facing the limit ring 8 are engaged, and then the swinging step of the driving rod 4 is repeated, and the scale 11 can be pushed in the direction of the detection needle 12 intermittently. When the fixing hook 121 of the detection needle 12 is hooked on the bone, observe the scale indicated by the scale indicator block 21. This length is the length between the bone plate and the bottom of the bone hole, that is, the screw length value, and then the appropriate screw can be selected according to the length.

[0051] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pistol-type depth gauge, comprising a depth gauge body (1) and a sleeve (2) slidably mounted on the depth gauge body (1), characterized in that: The depth gauge body (1) comprises a scale (11) and a detection needle (12) fixed to each other, the scale (11) and the detection needle (12) are arranged in the same direction, the scale (11) is provided with a scale mark (13), one end of the sleeve (2) facing the scale (11) is provided with a scale indicating block (21) for reading the scale value, a fixing rod (3) is fixedly arranged on the sleeve (2), a depth measuring device (5) is arranged between the fixing rod (3) and the scale (11), a driving rod (4) is pivotally connected to the fixing rod (3), and the driving rod (4) drives the depth measuring device (5) to push the depth gauge body (1) to move along the length direction of the sleeve (2); The depth sounding device (5) comprises a pushing assembly (51), and the pushing assembly (51) comprises a pushing block (511) and a pushing rod (512); One end of the pushing block (511) is clamped to the scale (11), and the other end of the pushing block (511) is hinged to the fixing rod (3); The push rod (512) is slidably sleeved on the end of the driving rod (4) facing the scale (11), one end of the push rod (512) is fixedly connected to the push block (511), and a support spring (6) is provided between the other end of the push rod (512) and the fixed rod (3); The depth sounding device (5) further comprises a reset assembly (52), wherein the reset assembly (52) comprises a reset spring (521) and a first limit block (522) and a second limit block (523) located at both ends of the reset spring (521), wherein the first limit block (522) is fixed between the scale (11) and the detection needle (12), and the second limit block (523) is slidably sleeved in the length direction of the detection needle (12); One end of the sleeve (2) away from the fixing rod (3) is threadedly connected with a fixing ring (524) for limiting the second limiting block (523), and the fixing ring (524) is sleeved in the length direction of the detection needle (12); A limit spring (7) is arranged between the fixing rod (3) and the driving rod (4); the end of the driving rod (4) facing the scale (11) is hingedly connected to a limit ring (8); and the limit ring (8) is sleeved on the scale (11).

2. A pistol-type depth gauge according to claim 1, characterized in that: A guide rod (525) is provided on a side of the first limit block (522) extending toward the second limit block (523), and the return spring (521) is sleeved on the guide rod (525).

3. A pistol-type depth gauge according to claim 1, characterized in that: The first limiting block (522) is provided with a bumping ball (9), and the bumping ball (9) is slidably connected to the inner wall of the sleeve (2).

4. The pistol-type depth gauge according to claim 1, characterized in that: A fixing hook (121) is provided at the end of the detection needle (12).

5. A pistol-type depth gauge according to claim 4, characterized in that: The scale indicating block (21) is provided with a slope (211) on a side facing away from the fixing hook (121), and the slope (211) is arranged to be inclined in the direction of the scale line (13).

6. A pistol-type depth gauge according to claim 4, characterized in that: A limiting column (526) is extended from a side of the second limiting block (523) away from the first limiting block (522), and the limiting column (526) is penetrated through one end of the fixing ring (524) facing the fixing hook (121).

7. The pistol-type depth gauge according to claim 1, characterized in that: A plurality of latch teeth (111) are arranged on one side of the scale (11) facing the push block (511), and one end of the push block (511) facing the scale (11) is meshed with the latch teeth (111).

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