An implant fatigue test vibration driving device and a test equipment

Abstract

The present invention discloses a vibration driving device for implant fatigue testing, belonging to the technical field of medical device testing. It includes a vibration mechanism, which includes a vibration driving member. The driving end of the vibration driving member is connected to a vibration shaft seat, and a vibration shaft for connecting an implant test piece is arranged on the vibration shaft seat. The vibration driving member drives the vibration shaft to vibrate up and down through the vibration shaft seat; and at least one buffer mechanism is arranged on the side of the vibration shaft seat and includes two buffer springs arranged coaxially with the vibration shaft. One buffer spring is arranged above the vibration shaft seat, and the other buffer spring is arranged below the vibration shaft seat, and the other ends of the two buffer springs are both abutted against a positioning member. The present invention reduces the load on the driving end of the vibration driving member through the buffer spring, prolongs the service life of the vibration driving member, and improves the stability of the periodic axial movement of the vibration shaft, thereby improving the test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device testing, and particularly to a vibration driving device and a testing device for implant fatigue testing. Background Art

[0002] Implant fatigue testing equipment is used to conduct cyclic deformation durability tests on various types of surgical implants (such as heart valves, vascular valves, vascular stents, vascular linings, occluders, etc.), aiming to provide repeated loading conditions to the test samples during operation to simulate the typical or specific physiological load conditions of artificial blood vessels, heart artificial valves, or other implants over time, so as to determine the efficacy, elasticity, and wear of the equipment.

[0003] Taking a vascular stent as an example, the cyclic deformation durability tests related to the vascular stent include: axial tension and compression, bending, torsion, and radial expansion and contraction. Among them, the bending test includes axial compression bending, mandrel bending, and coreless arc bending. As Figure 1 shown, in the axial compression bending test, after the stent 1 is released in the simulated blood vessel 2, the simulated blood vessel 2 is fixed to a set of fixing devices 3, and these fixing devices 3 can rotate the ends of the simulated blood vessel 2. The fixing devices 3 are installed on a device that can continuously transmit periodic axial motion to the simulated blood vessel 2. When the distance between the two fixing devices 3 is shortened, the ends of the simulated blood vessel 2 will rotate, and the simulated blood vessel 2 loaded with the stent 1 will bend to a certain radius of curvature, thereby testing the axial compression bending durability of the stent 1.

[0004] However, the driving device is immediately stressed after loading the fixing device and the implant test piece, resulting in the subsequent operation of the driving device. Due to its load, the periodic axial motion is affected, thereby affecting the test accuracy.

[0005] Therefore, in view of the above problems, it is necessary to propose a further solution. Summary of the Invention

[0006] The present invention aims to provide a vibration driving device for implant fatigue testing to overcome the deficiencies in the prior art.

[0007] To solve the above technical problems, the technical solution of the present invention is:

[0008] A vibration driving device for implant fatigue testing, comprising:

[0009] A vibration mechanism, the vibration mechanism includes a vibration driving member, the driving end of the vibration driving member is connected to a vibration shaft seat, a vibration shaft for connecting an implant test piece is arranged on the vibration shaft seat, and the vibration driving member drives the vibration shaft to vibrate up and down through the vibration shaft seat; and,

[0010] At least one buffer mechanism, the buffer mechanism is arranged on the side of the vibration shaft seat, and includes two buffer springs arranged coaxially with the vibration shaft. One buffer spring is arranged above the vibration shaft seat, and the other buffer spring is arranged below the vibration shaft seat, and the other ends of the two buffer springs are both abutted against a positioning member.

[0011] In a preferred embodiment of the present invention, when the vibration driving member reaches the limit movement stroke, the buffer spring is compressed and the provided elastic force ≤ 40% of the rated continuous thrust of the vibration driving member.

[0012] In a preferred embodiment of the present invention, the vibration driving member is a linear motor or an electromagnetic vibrator, and the vibration driving member is arranged vertically.

[0013] In a preferred embodiment of the present invention, it further includes a substrate, a vertical seat for installing the vibration driving member is arranged on the substrate, a fixed seat is arranged on the vertical seat, a sliding seat slidably connected with the fixed seat is connected to the driving end of the vibration driving member, and the vibration shaft seat is arranged on the sliding seat.

[0014] In a preferred embodiment of the present invention, a cross track is arranged between the sliding seat and the fixed seat, one track in the cross track is arranged on the sliding seat, and the other track is arranged on the fixed seat.

[0015] In a preferred embodiment of the present invention, the vibration shaft is arranged parallel to the driving end of the vibration driving member.

[0016] In a preferred embodiment of the present invention, the vibration shaft is arranged coaxially with the driving end of the vibration driving member.

[0017] In a preferred embodiment of the present invention, guiding sliding sleeves are arranged at both ends of the vibration shaft.

[0018] In a preferred embodiment of the present invention, the two buffer springs are provided with a pre-compression amount.

[0019] In a preferred embodiment of the present invention, a magnetic spring device is arranged on the fixed seat, the power end of the magnetic spring device is connected to the sliding seat, and the magnetic spring device pulls the sliding seat.

[0020] Another technical solution is:

[0021] An implant fatigue test device includes the implant fatigue test vibration driving device as described in any one of the above.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] (1) In the present invention, the driving end of the vibration driving member is connected to the vibration shaft seat, the vibration shaft seat is connected to the vibration shaft and the buffer mechanism, and the buffer mechanism includes a buffer spring arranged coaxially with the vibration shaft. By means of the buffer spring, the load on the driving end of the vibration driving member is reduced, the service life of the vibration driving member is prolonged, and the vibration driving member is kept balanced, so that the vibration shaft drives the implant test piece to vibrate up and down at the balance point, the stability of the periodic axial movement of the vibration shaft is improved, and thus the test accuracy is improved.

[0024] (2) In the present invention, by using a linear motor or an electromagnetic vibrator as the vibration driving member, it has high stability, small volume, convenient installation, and is vertically installed, further reducing the occupied area and improving the space utilization rate of the device; meanwhile, by the sliding connection between the fixed seat arranged on the vertical seat and the sliding seat arranged on the vibration shaft seat, and the sliding seat is connected to the driving end of the vibration driving member, the vibration driving member drives the vibration shaft to move up and down stably, the stability of the periodic axial movement of the vibration shaft is improved, and thus the test accuracy is improved; further, the sliding connection between the two is realized by the cross track arranged between the fixed seat and the sliding seat, the reciprocating linear movement precision of the sliding seat is improved, and thus the test precision is improved; still further, by the magnetic spring device arranged on the fixed seat, and the power end of the magnetic spring device is connected to the sliding seat, thereby pulling the sliding seat, making the load on the driving end of the vibration driving member close to zero, so that when the vibration driving member vibrates, within the upper and lower two vibration cycles, the load force deviation caused by gravity can be reduced as much as possible, further improving the operation precision of the vibration driving member and prolonging the service life of the vibration driving member, while reducing the load on the buffer spring and making the operation of the buffer spring more stable.

[0025] (3) In the present invention, by arranging the vibration shaft and the driving end of the vibration driving member in parallel, the vibration shaft driving member, the vibration shaft and the buffer mechanism are arranged side by side in sequence, which is convenient for maintaining different components, and multiple components are horizontally arranged in sequence, which is beneficial to reducing the height of the device; or, in the present invention, by arranging the vibration shaft and the driving end of the vibration driving member coaxially, the generation of bending moment is avoided, the load capacity of the vibration shaft is improved, the stability of the periodic axial movement of the vibration shaft is improved, and thus the test accuracy is improved.

[0026] (4) In the present invention, by arranging guiding sliding sleeves at both ends of the vibration shaft, the vibration shaft is supported at two points, thereby improving the stability and axial retention of the vibration shaft, further prolonging the service life of the device, and improving the stability of the periodic axial movement of the vibration shaft, and thus the test accuracy is improved. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of a fixing device in the prior art;

[0029] Figure 2 It is a three-dimensional enlarged schematic diagram of the vibration driving device in the present invention;

[0030] Figure 3 It is a cross-sectional schematic diagram after the fixing base and the sliding base in the present invention are connected;

[0031] Figure 4 It is a three-dimensional enlarged schematic diagram of another vibration driving device in the present invention;

[0032] Figure 5 It is a three-dimensional schematic diagram of the implant fatigue test equipment in the present invention.

[0033] Specifically, 1. Bracket; 2. Simulated blood vessel; 3. Fixing device;

[0034] 100. Machine shell; 200. Substrate; 300. Main guiding column; 400. Base;

[0035] 500. Vibration driving member; 501. Standing seat; 502. Fixing base; 503. Sliding base; 504. Magnetic spring device; 505. Vibration shaft seat; 507. Cross track; 510. Vibration shaft; 511. Upper guiding sliding sleeve; 512. Lower guiding sliding sleeve; 520. Buffer spring; 521. Guide post; 522. Positioning member;

[0036] 800. Upper fixing mechanism; 820. Lower fixing mechanism. Specific embodiments

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Embodiment 1:

[0040] As Figure 2 shown, an implant fatigue test vibration driving device includes a vibration mechanism and at least one buffer mechanism. In this embodiment, the above mechanisms are arranged on a substrate 200, and a fixing device for fixing an implant test piece is arranged below the substrate 200. This fixing device can adopt an existing fixing device as Figure 1 shown, or other structural fixing devices.

[0041] The vibration mechanism includes a vibration driving member 500. The vibration driving member 500 is a linear motor or an electromagnetic vibrator, which has high stability, small volume, and convenient installation. Specifically, a voice coil motor, a magnetostrictive vibrator, or other electric or non-electric mechanical vibration devices can be adopted. At the same time, both a DC motor and an AC motor are acceptable. In this embodiment, the vibration driving member 500 is arranged vertically, that is, perpendicular to the substrate 200, thereby further reducing the occupied area, reducing transmission components, and improving the space utilization rate of the device. To install the vibration driving member 500, a vertical seat 501 is arranged on the substrate 200. The vertical seat 501 includes a back plate arranged perpendicular to the substrate 200, and an upper plate is horizontally arranged at the top of the back plate. The vibration driving member 500 is fixed to the upper plate, and the driving end faces downward. Rib plates are also arranged on both sides of the vertical seat 501, thereby improving the overall strength and further improving the running stability of the vibration driving member 500.

[0042] The driving end of the vibration driving member 500 is connected to a vibration shaft seat 505, and a vibration shaft 510 for connecting an implant test piece is arranged on the vibration shaft seat 505. It can be understood that the vibration shaft 510 penetrates through the substrate 200 and is connected to one end of the fixing device, and the other end of the fixing device is fixed, for example, connected to the substrate 200. The implant test piece is fixed between the two ends of the fixing device. Thus, the vibration driving member 500 drives the vibration shaft 510 to vibrate up and down, and further drives one end of the fixing device to vibrate up and down relative to the other end, so as to perform an axial deformation test on the implant test piece located between the two ends of the fixing device. A fixing seat 502 is further arranged on the stand 501. The driving end of the vibration driving member 500 is connected to a sliding seat 503 slidably connected to the fixing seat 502, and the vibration shaft seat 505 is arranged on the sliding seat 503, thereby realizing the stable up and down movement of the vibration driving member 500 driving the vibration shaft 510, improving the stability of the periodic axial movement of the vibration shaft 510, and further improving the test accuracy. In this embodiment, the fixing seat 502 is located directly below the vibration driving member 500, and an L-shaped sliding seat 503 is adopted. One end of the sliding seat 503 is connected to the driving end, and the other end is connected to the vibration shaft seat 505, so that the sliding seat 503 can be as thin as possible, thereby reducing the load at the driving end and improving the operating stability of the vibration driving member 500. At the same time, this setting makes the vibration shaft 510 and the driving end of the vibration driving member 500 arranged in parallel, that is, the vibration shaft 510 driving member, the vibration shaft 510, and the buffer mechanism are arranged side by side in sequence, which is convenient for maintaining different components, and multiple components are arranged horizontally in sequence, which is beneficial to reducing the height of the device.

[0043] As Figure 3 shown, a cross track 507 is further arranged between the sliding seat 503 and the fixing seat 502. The cross track 507 is also called a cross roller track or a cross roller raceway. One track in the cross track 507 is arranged on the sliding seat 503, and the other track is arranged on the fixing seat 502, thereby improving the reciprocating linear motion accuracy of the sliding seat 503, and further improving the test accuracy. And in this embodiment, convex ribs are arranged on the side surface of the fixing seat 502, and one track of the cross track 507 is arranged on both sides of the convex ribs. Grooves are arranged on the corresponding surface of the sliding seat 503, and the other track of the cross track 507 is arranged on both sides of the grooves, so as to realize bilateral sliding. While improving the reciprocating linear motion accuracy of the sliding seat 503, the strength of the connection between the two is improved, the movement stability is improved, and the test accuracy is further improved.

[0044] The buffer mechanism is arranged on the side of the vibration shaft seat 505, and one, two or more can be arranged. In this embodiment, one buffer mechanism is arranged, and it is arranged at the other end of the vibration shaft seat 505 relative to the vibration driving member 500, and is basically symmetrically arranged with respect to the vibration shaft 510 and the vibration driving member 500.

[0045] The buffer mechanism includes two buffer springs 520 arranged coaxially with the vibration shaft 510. One buffer spring 520 is arranged above the vibration shaft seat 505, with its bottom end abutting against the vibration shaft seat 505 and its top end abutting against the positioning member 522 located above the vibration shaft seat 505. The other buffer spring 520 is arranged below the vibration shaft seat 505, with its top end abutting against the vibration shaft seat 505 and its bottom end abutting against the positioning member 522 located below the vibration shaft seat 505. Preferably, the two buffer springs 520 are provided with a pre-compression amount to provide a certain elastic force for offsetting the load at the driving end of the vibration driving member 500 and improving the operating stability of the two buffer springs 520. Moreover, the two buffer springs 520 respectively exert a downward thrust and an upward thrust on the vibration shaft seat 505, and there will be an automatic force balance position between the two thrusts when the vibration driving member 500 is not powered on or the vibration driving member 500 does not output a driving force. Therefore, on the one hand, after the vibration driving member 500 is powered off, the vibration shaft 510 can automatically return to the force balance point; on the other hand, during the vibration process, every time the vibration shaft 510 reaches the maximum displacement from the balance point (i.e., the real starting point), for example, when vibrating upward to the maximum displacement, at this time the upper buffer spring 520 has the largest compression amount, and the compression amount of the upper buffer spring 520 is greater than that of the lower one. Thus, the resultant force of the upper and lower buffer springs 520 is downward, and at this time the vibration driving member 500 needs to provide a downward driving force to drive the vibration shaft 510 to move downward. At this time, the internal stress of the buffer spring 520 will save a part of the downward driving force for the vibration driving member 500, which is beneficial to the long-term stable operation of the vibration driving member 500 and the improvement of the service life of the driving circuit of the vibration driving member 500.

[0046] Preferably, when the vibration driving member 500 reaches the limit movement stroke, the buffer spring 520 is compressed and the provided elastic force ≤ 40% of the rated continuous thrust of the vibration driving member 500. If the compression and rebound force of the buffer spring 520 is too large, it will also increase the load when the vibration driving member 500 is pushed to the limit position, so it is recommended not to be greater than 40%.

[0047] In this embodiment, the buffer mechanism further includes a guide post 521 arranged on the substrate 200. The buffer spring 520 is sleeved on the guide post 521. Both positioning members 522 are annular blocks, sleeved on the guide post 521 and fixed to it. The internal gap between the guide post 521 and the buffer spring 520 is not less than 1 mm to avoid contact and friction between the buffer spring 520 and the guide post 521 after compression, and not more than 5 mm to improve the space utilization rate.

[0048] The device is connected to a vibration shaft seat 505 through the driving end of a vibration driving member 500. The vibration shaft seat 505 is connected to a vibration shaft 510 and a buffer mechanism. The buffer mechanism includes a buffer spring 520 arranged coaxially with the vibration shaft 510. By means of the buffer spring 520, the load on the driving end of the vibration driving member 500 is reduced, the service life of the vibration driving member 500 is prolonged, and the vibration driving member 500 is kept in balance, so that the vibration shaft 510 drives the implant test piece to vibrate up and down at the balance point, improving the stability of the periodic axial movement of the vibration shaft 510, and further improving the test accuracy.

[0049] Guide sliding sleeves are also arranged at both ends of the vibration shaft 510, namely an upper guide sliding sleeve 511 arranged at the proximal end of the vibration shaft 510 and a lower guide sliding sleeve 512 arranged at the distal end of the vibration shaft 510. Specifically, the upper guide sliding sleeve 511 can be fixed to the substrate 200. The vibration shaft 510 passes through the substrate 200 through the upper guide sliding sleeve 511 and extends downward to be connected to the fixing device. The lower guide sliding sleeve 512 can be connected to the fixing device, so that the vibration shaft 510 is supported at two points, improving the stability and axial retention of the vibration shaft 510, further prolonging the service life of the device, and improving the stability of the periodic axial movement of the vibration shaft 510, and further improving the test accuracy.

[0050] Embodiment 2:

[0051] On the basis of Embodiment 1, as Figure 2 shown, in this embodiment, a magnetic spring device 504 is arranged on the fixed seat 502. The power end of the magnetic spring device 504 is connected to the sliding seat 503. The magnetic spring device 504 pulls the sliding seat 503, so that the load on the driving end of the vibration driving member 500 is close to zero. When the vibration driving member 500 vibrates, within the upper and lower two vibration cycles, the load force deviation caused by gravity can be reduced as much as possible, thereby improving the operating accuracy of the vibration driving member 500, prolonging the service life of the vibration driving member 500, and at the same time reducing the load on the buffer spring 520, making the operation of the buffer spring 520 more stable.

[0052] In this embodiment, the device mainly cancels the load on the driving end of the vibration driving member 500 through the magnetic spring device 504, realizes energy storage through the buffer spring 520, and when the vibration driving member 500 stops working, the vibration shaft 510 automatically resets to the midpoint. Compared with Embodiment 1, the periodic axial movement of the vibration shaft in this embodiment is more stable, the test is more accurate, and the energy consumption is also lower.

[0053] The magnetic spring device 504 in the device can adopt the magnetic spring device 504 in the prior art, such as the M-Spring constant force magnetic spring, which provides a constant thrust or pull force within the entire stroke range of the vibration driving member 500, and realizes the compensation and cancellation of gravity through the magnetic field.

[0054] Example 3:

[0055] Although in Example 2, the load at the driving end of the vibration driving member 500 is made close to zero by the magnetic spring device 504, the driving end and the load are not coaxial, which will generate bending moment and is still not suitable for large load conditions.

[0056] Based on Example 1 and Example 2, as Figure 4 shown, in this embodiment, the vibration shaft 510 is coaxially arranged with the driving end of the vibration driving member 500, thereby avoiding the generation of bending moment, improving the load capacity of the vibration shaft 510, and improving the stability of the periodic axial movement of the vibration shaft 510, and further improving the test accuracy.

[0057] A cantilever beam is arranged in the radial direction of the vibration shaft 510, and a buffer mechanism is arranged on the cantilever beam. Preferably, two buffer mechanisms are symmetrically arranged.

[0058] Example 4:

[0059] As Figure 5 shown, an implant fatigue test device adopts the implant fatigue test vibration driving device in Example 1 or Example 2. The test device includes a substrate 200, a main guiding column 300 and a base 400. A working unit is arranged above the substrate 200, and the working unit is covered inside the machine shell 100. The working unit includes this device. The vibration shaft 510 of this device extends below the substrate 200 and is connected to a fixing device arranged below the substrate 200. Specifically, the fixing device includes an upper fixing mechanism 800 and a lower fixing mechanism 820. The upper fixing mechanism 800 is connected to the substrate 200, and the lower fixing mechanism 820 is connected to the vibration shaft 510. The lower fixing mechanism 820 is driven by the vibration shaft 510 to move up and down periodically, so that the implant test piece located between the upper fixing mechanism 800 and the lower fixing mechanism 820 moves axially periodically for testing.

[0060] On both sides of the machine shell 100 of this device, a lead screw connected to the working unit and the main guiding column 300 are also arranged. The main guiding column 300 and the lead screw are arranged on the base 400. The lead screw drives the substrate 200 to move downward along the main guiding column 300, thereby adjusting the height position of the fixing device.

[0061] In summary, in the present invention, the driving end of the vibration driving member is connected to the vibration shaft seat, the vibration shaft seat is connected to the vibration shaft and the buffer mechanism, and the buffer mechanism includes a buffer spring arranged coaxially with the vibration shaft. By the buffer spring, the load at the driving end of the vibration driving member is reduced, the service life of the vibration driving member is prolonged, and the vibration driving member is kept balanced, so that the vibration shaft drives the implant test piece to vibrate up and down at the balance point, improving the stability of the periodic axial movement of the vibration shaft, and further improving the test accuracy.

[0062] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An implant fatigue test vibration driving device, characterized in that, it includes: a vibration mechanism, the vibration mechanism includes a vibration driving member, a vibration shaft seat is connected to the driving end of the vibration driving member, a vibration shaft for connecting an implant test piece is arranged on the vibration shaft seat, and the vibration driving member drives the vibration shaft to vibrate up and down through the vibration shaft seat; and, at least one buffer mechanism, the buffer mechanism is arranged on the side of the vibration shaft seat, and includes two buffer springs arranged coaxially with the vibration shaft, one buffer spring is arranged above the vibration shaft seat, the other buffer spring is arranged below the vibration shaft seat, and the other ends of the two buffer springs are both abutted against a positioning member; the two buffer springs are provided with a pre-compression amount and are used to offset the load at the driving end of the vibration driving member; the vibration driving member is a linear motor or an electromagnetic vibrator, and the vibration driving member is arranged vertically; the vibration shaft is arranged parallel to the driving end of the vibration driving member; it further includes a substrate, a vertical seat for installing the vibration driving member is arranged on the substrate, a fixed seat is arranged on the vertical seat, a sliding seat slidably connected to the fixed seat is connected to the driving end of the vibration driving member, and the vibration shaft seat is arranged on the sliding seat; the fixed seat is located directly below the vibration driving member, the sliding seat is an L-shaped sliding seat, one end of the L-shaped sliding seat is located above the fixed seat and is connected to the vibration driving member, and the other end is slidably connected to the side of the fixed seat; a magnetic spring device is arranged on the fixed seat, and the power end of the magnetic spring device is connected to the sliding seat, and the magnetic spring device pulls the sliding seat; the vibration shaft extends below the substrate and is used to be connected to the lower fixing mechanism in the fixing device to drive the lower fixing mechanism to move up and down periodically, and cooperate with the upper fixing mechanism in the fixing device connected to the substrate, so that the implant test piece located between the upper fixing mechanism and the lower fixing mechanism moves axially periodically.

2. The implant fatigue test vibration driving device according to claim 1, characterized in that, when the vibration driving member reaches the limit movement stroke, the buffer spring is compressed and the provided elastic force ≤ 40% of the rated continuous thrust of the vibration driving member.

3. The implant fatigue test vibration driving device according to claim 1, characterized in that, a cross track is arranged between the sliding seat and the fixed seat, one track in the cross track is arranged on the sliding seat, and the other track is arranged on the fixed seat.

4. The implant fatigue test vibration driving device according to claim 1, characterized in that, guide sliding sleeves are arranged at both ends of the vibration shaft.

5. An implant fatigue test device, characterized in that, it includes the implant fatigue test vibration driving device according to any one of claims 1-4.

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