A horn and a transducer using the same

Abstract

The utility model discloses a variable amplitude pole belongs to medical instrument technical field, and it includes the main rod and installs piezoelectric ceramic and electrode piece group in the main rod, be equipped with the shaft sleeve in piezoelectric ceramic and electrode piece group, the shaft sleeve is integral type structure with the main rod, the length of shaft sleeve is consistent with the connecting rod section length of variable amplitude pole, the inner hole diameter in the shaft sleeve is consistent with the diameter of connecting rod section, the main rod in the upper portion of shaft sleeve inner hole is equipped with the thread hole for the thread rod section of screw joint variable amplitude pole, the upper portion of thread hole is equipped with the cavity chamber for the lead -in rod section of inserting variable amplitude pole, the utility model discloses still a kind of transducer, the utility model solves the problem that energy is wasted in energy transmission process due to the existence of a large number of useless gap in connecting portion in variable amplitude pole in relevant technology, while through the redesign of variable amplitude pole, the influence of energy reverse transmission is reduced, the reliability and stability of the design are improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an amplitude transformer and a transducer using the same. Background Technology

[0002] The transducer is a key component installed inside the handle of dental medical devices such as ultrasonic scalers and ultrasonic bone scalpels. For example, a transducer for ultrasonic dental equipment disclosed in publication number CN204912004U typically consists of four main parts: an amplitude transformer, a connecting rod, a piezoelectric ceramic, and a main rod. In this design, the main energy loss point for the energy generated by the transducer and transmitted to the amplitude transformer lies in the threaded connection between the amplitude transformer and the main rod. To address this issue, publication number CN114682469A discloses an amplitude transformer that uses an integrated structure of the main rod and connecting rod, eliminating the threaded connection between the amplitude transformer and the main rod, thus reducing energy loss during transmission. However, the integrated connecting rod, designed in the opposite direction to the amplitude transformer, is susceptible to reverse energy transmission, potentially causing vibration. This vibration is a negative vibration that not only damages the energy but may also affect the normal operation of the piezoelectric ceramic. Utility Model Content

[0003] This invention proposes an amplitude transformer and a transducer using it to solve the problem in related technologies where a large number of useless gaps in the connection part of the amplitude transformer cause energy loss during energy transmission. At the same time, by redesigning the amplitude transformer, the influence of reverse energy transmission is reduced, thereby improving the reliability and stability of this design.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an amplitude transformer, comprising an amplitude transformer segment and a connecting rod segment integrally formed therewith at its end, wherein a threaded rod segment integrally formed therewith is fixed to the end of the connecting rod segment, and an inlet rod segment integrally formed therewith is fixed to the end of the threaded rod segment, wherein the length of the connecting rod segment is consistent with the length of the piezoelectric ceramic and electrode plate assembly in the transducer, and the diameter of the connecting rod segment is consistent with the diameter of the insertion hole provided in the piezoelectric ceramic and electrode plate assembly.

[0005] Preferably, the diameter of the threaded rod segment is smaller than the diameter of the connecting rod segment.

[0006] Preferably, the diameter of the guide rod segment is smaller than the diameter of the threaded rod segment.

[0007] Preferably, the end of the guide rod segment is chamfered.

[0008] Preferably, the connection between the connecting rod segment and the threaded rod segment is provided with a transition slope.

[0009] Preferably, the variable amplitude rod segment is provided with two opposing bayonet platforms, and each of the two bayonet platforms is provided with a reinforcing strip that is an integral part of the platform.

[0010] Preferably, the reinforcing strip is located at the edge of the bayonet platform, and the reinforcing strip is located on the side of the bayonet platform in the direction of force application where the amplitude transformer is loosened from the transducer.

[0011] Preferably, the reinforcing strip is triangular in shape with rounded corners at the top.

[0012] A transducer using the aforementioned amplitude transformer includes a main rod and a piezoelectric ceramic and electrode assembly installed in the main rod. The piezoelectric ceramic and electrode assembly has a bushing, which is integral with the main rod. The length of the bushing is the same as the length of the connecting rod segment of the amplitude transformer. The inner diameter of the bushing is the same as the diameter of the connecting rod segment. A threaded hole for screwing a threaded rod segment of the amplitude transformer is opened in the main rod above the inner hole of the bushing. Above the threaded hole is a cavity for inserting an inlet rod segment of the amplitude transformer.

[0013] Preferably, the depth of the cavity is greater than the height of the guide rod segment. Due to the adoption of the above technical solution, this utility model has the following beneficial effects:

[0014] 1. This utility model adopts a three-section structure of connecting rod section, threaded rod section and guide rod section at the end where the amplitude rod connects to the transducer. The connection position between the amplitude rod and the transducer is transferred from the traditional amplitude rod to the transducer. This solves the problem in related technologies where a large number of useless gaps in the connection part located in the amplitude rod cause energy loss during energy transfer.

[0015] 2. The amplitude transformer of this utility model adopts a three-section variable diameter structure from small to large, which can effectively guide the installation of the amplitude transformer and ensure that the damage to the hole wall of the transducer main rod is reduced to a low level. This avoids structural damage to the transducer during assembly and greatly improves the service life of the amplitude transformer and the transducer.

[0016] 3. The connecting rod segment of this utility model is designed according to the length of the piezoelectric ceramic and electrode plate group and the diameter of the insertion hole in the main rod of the transducer, so that the connecting rod segment fits tightly with the main rod, thereby reducing the influence of reverse energy transmission and improving the reliability and stability of this design. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front structure of the amplitude rod proposed in Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the side structure of the amplitude rod proposed in Embodiment 1 of this utility model.

[0019] Figure 3 For along Figure 2 A schematic diagram of the cross-section after cutting the axis of the amplitude transformer.

[0020] Figure 4 For along Figure 1 A schematic diagram of the cross-section of the bayonet platform of the amplitude transformer.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the transducer proposed in Embodiment 2 of this utility model.

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the transducer main rod proposed in Embodiment 2 of this utility model.

[0023] The components in the attached diagram are labeled as follows: 1-amplifier rod segment, 2-connecting rod segment, 3-threaded rod segment, 4-guide rod segment, 5-chamfer, 6-transition slope, 7-bayonet platform, 8-reinforcing strip, 9-main rod, 10-piezoelectric ceramic and electrode plate assembly, 11-shaft sleeve, 12-insertion hole, 13-threaded hole, 14-cavity. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 1-6 As shown, an amplitude transformer includes an amplitude transformer segment 1 and a connecting segment 2 integrally formed with it at its end. A threaded segment 3, also integrally formed with the connecting segment 2, is fixed to the end of the connecting segment 2 for screwing into the main rod 9 of the transducer, thereby enabling the amplitude transformer to be installed in the transducer. The diameter of the threaded segment 3 is smaller than that of the connecting segment 2 to reduce wear caused by the threads scraping against the insertion hole in the main rod 9 during the insertion of the connecting segment 2 into the main rod 9. Specifically, the length of the threaded segment 3 can be set to approximately 1 / 3 of the length of the connecting segment 2, and its diameter can be 2-3 mm smaller than that of the connecting segment 2.

[0027] The end of the threaded rod segment 3 is fixed with an integral guide rod segment 4, which guides the amplitude transformer rod into the main rod 9 of the transducer, reducing the risk of the amplitude transformer rod segment colliding with the insertion hole of the main rod 9 when it is first inserted. In this embodiment, the diameter of the guide rod segment 4 is smaller than the diameter of the threaded rod segment 3, specifically about 2 mm smaller, while its length can be set to about 1 / 4 of the diameter of the threaded rod segment 3. Its end is also provided with a chamfer 5, which further reduces the risk of collision or damage to the wall of the insertion hole of the main rod 9 caused by the collision.

[0028] The amplitude transformer in this embodiment adopts a three-section variable diameter structure from small to large, which can effectively guide the installation of the amplitude transformer and ensure that the damage to the wall of the insertion hole of the transducer main rod is reduced to a low level. This avoids structural damage to the transducer during assembly and greatly improves the service life of the amplitude transformer and the transducer.

[0029] This invention relocates the connection between the amplitude transformer and the transducer from the traditional amplitude transformer to the transducer, solving the problem of energy loss during energy transfer caused by numerous useless gaps in the connection within the amplitude transformer. However, this design also has a significant drawback: energy transferred to the amplitude transformer may be transmitted back to the connecting rod segment 2 and above. To address this issue, in this embodiment, the length of the connecting rod segment 2 is the same as the length of the piezoelectric ceramic and electrode assembly 10 in the transducer, and the diameter of the connecting rod segment 2 is the same as the diameter of the insertion hole 12 provided in the piezoelectric ceramic and electrode assembly 10. This design primarily ensures a tight connection between the connecting rod segment 2 and the main rod 9 of the transducer, while also preventing gaps in the threaded connection between the amplitude transformer and the main rod of the transducer from affecting the normal operation of the piezoelectric ceramic and electrode assembly. Since the diameter of the main rod 9 is much larger than the diameter of the end of the luffing rod, the closer the connecting rod segment 2 is to the main rod 9, the less likely the energy transmitted in the reverse direction by the luffing rod will affect the rod segment located in the main rod 9. This reduces the impact of energy transmission in the reverse direction and improves the reliability and stability of this design.

[0030] Since the diameter of the connecting rod segment 2 is the same as that of the insertion hole 12, and the threaded rod segment 3 is smaller than the connecting rod segment 2, in order to avoid the problem that the connecting rod segment 2 is difficult to insert into the insertion hole 12 due to the step between the connecting rod segment 2 and the threaded rod segment 3, a transition slope 6 is provided at the connection between the connecting rod segment 2 and the threaded rod segment 3, which is used to guide the connecting rod segment 2 into the insertion hole 12.

[0031] Preferably, in this embodiment, the luffing rod segment 1 is provided with two opposing bayonet platforms 7, each of which is provided with a reinforcing strip 8 integrally formed with it. Traditional luffing rod bayonet platforms are flat; when installing the luffing rod, it is only necessary to tighten it to the appropriate torque using a torque wrench. However, during disassembly, the initial disassembly force is often greater than the torque required for tightening. This is mainly because, during use, the transducer is affected by vibrations, the molecular attraction between the materials of the two components after tightening, and the thermal expansion and contraction of materials due to changes in ambient temperature and humidity. Therefore, the loosening force of the luffing rod will be much greater than the tightening force. Based on this phenomenon, observation of actual products revealed that the wear on the side of the luffing rod in the direction of force application when loosening it from the transducer is much greater than on the other side. In some luffing rods with high disassembly and assembly frequency, pits or bevels may appear at the edge of this location. Therefore, this embodiment provides a reinforcing strip 8 to strengthen the bayonet platform 7. Specifically, the reinforcing strip 8 is located at the edge of the bayonet platform 7, and is situated on the side of the bayonet platform 7 in the direction of force application for loosening the amplitude transformer from the transducer. The reinforcing strip 8 is triangular with rounded corners at the top, meaning its shape matches the toothed groove in a wrench, and its size is also based on the groove design of a general-purpose wrench. By engaging the reinforcing strip in the groove of the wrench, the stability of the wrench during disassembly is improved, causing the wrench to rotate when force is applied.

[0032] Example 2

[0033] like Figure 5-6 As shown, a transducer using the aforementioned amplitude transformer includes a main rod 9 and a piezoelectric ceramic and electrode assembly 10 installed in the main rod 9. The piezoelectric ceramic and electrode assembly 10 includes a bushing 11. Specifically, the piezoelectric ceramic and electrode assembly 10 and the bushing 11 can be seamlessly fixed using potting / injection molding. The bushing 11 and the main rod 9 are an integral structure. The length of the bushing 11 is the same as the length of the connecting rod segment 2 of the amplitude transformer. The inner hole in the bushing 11 serves as an insertion hole 12, and its diameter is the same as the diameter of the connecting rod segment 2. Above the inner hole of the bushing 11, the main rod 9 has a threaded hole 13 for screwing onto the threaded rod segment 3 of the amplitude transformer. Above the threaded hole 13, there is a cavity 14 for inserting the guide rod segment 4 of the amplitude transformer. The depth of the cavity 14 is greater than the height of the guide rod segment 4 to ensure that the amplitude transformer can fit tightly against the piezoelectric ceramic and electrode assembly 10.

[0034] This design enables the transducer to be used in conjunction with the amplitude rod designed in Embodiment 1. It not only solves the problem in related technologies where a large number of useless gaps in the connection part of the amplitude rod cause energy loss during energy transmission, but also ensures a tight fit between the connecting rod segment 2 and the main rod 9, reducing the impact of reverse energy transmission and improving the reliability and stability of this design.

[0035] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A luffing boom, comprising a luffing boom segment (1) and a connecting boom segment (2) disposed at its end and integrally formed therewith, characterized in that: The end of the connecting rod segment (2) is fixed with a threaded rod segment (3) which is integral with it. The end of the threaded rod segment (3) is fixed with an inlet rod segment (4) which is integral with it. The length of the connecting rod segment (2) is consistent with the length of the piezoelectric ceramic and electrode plate group (10) in the transducer. The diameter of the connecting rod segment (2) is consistent with the diameter of the insertion hole (12) provided in the piezoelectric ceramic and electrode plate group (10).

2. The amplitude transformer according to claim 1, characterized in that: The diameter of the threaded rod segment (3) is smaller than the diameter of the connecting rod segment (2).

3. The amplitude transformer according to claim 1, characterized in that: The diameter of the guide rod segment (4) is smaller than the diameter of the threaded rod segment (3).

4. A variable amplitude rod according to claim 1 or 3, characterized in that: The end of the guide rod segment (4) is chamfered (5).

5. The amplitude transformer according to claim 1, characterized in that: The connection between the connecting rod segment (2) and the threaded rod segment (3) is provided with a transition slope (6).

6. The amplitude transformer according to claim 1, characterized in that: The variable amplitude rod segment (1) is provided with two opposing bayonet platforms (7), and each of the two bayonet platforms (7) is provided with a reinforcing strip (8) that is an integral part of it.

7. The amplitude transformer according to claim 6, characterized in that: The reinforcing strip (8) is located at the edge of the bayonet platform (7), and the reinforcing strip (8) is located on the side of the bayonet platform (7) that is loosened from the transducer in the direction of force application.

8. The amplitude transformer according to claim 7, characterized in that: The reinforcing strip (8) is triangular in shape with rounded corners at the top.

9. A transducer using an amplitude transformer as described in any one of claims 1-8, characterized in that: The device includes a main rod (9) and a piezoelectric ceramic and electrode assembly (10) installed in the main rod (9). The piezoelectric ceramic and electrode assembly (10) is provided with a bushing (11). The bushing (11) and the main rod (9) are an integral structure. The length of the bushing (11) is consistent with the length of the connecting rod section (2) of the amplitude transformer. The inner diameter of the bushing (11) is consistent with the diameter of the connecting rod section (2). The main rod (9) above the inner hole of the bushing (11) is provided with a threaded hole (13) for screwing the threaded rod section (3) of the amplitude transformer. Above the threaded hole (13) is a cavity (14) for inserting the guide rod section (4) of the amplitude transformer.

10. A transducer according to claim 9, characterized in that: The depth of the cavity (14) is greater than the height of the guide rod segment (4).

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