Film stretching device

Abstract

The invention provides a film stretching device which comprises a connecting rack and a stretching rack, the connecting rack comprises a first connecting plate and a second connecting plate, and the stretching rack comprises a reverse threaded rod rotationally connected between the first connecting plate and the second connecting plate. A first sliding plate and a second sliding plate are in threaded connection with the reverse threaded rod through a first thread and a second thread respectively; the thread directions of the first thread and the second thread are opposite; moreover, a first pressing strip is arranged on the first sliding plate, a second pressing strip is arranged on the second sliding plate, one end of a to-be-stretched film sample is fixed with the first sliding plate through the first pressing strip, and the other end of the to-be-stretched film sample is fixed with the second sliding plate through the second pressing strip. The film stretching device provided by the invention can solve the problem that an existing mechanical property test platform cannot realize the stretching stress test of a small sample under a microscopic imaging instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of material testing, and more specifically, to a thin film stretching device. Background Art

[0002] With the rise of flexible electronics, wearable and implantable technologies, there is a demand for flexibility in sensors. As a very important type of sensor, magnetic sensors also face the problem of flexibility. Stable performance under stress is a basic requirement for flexible devices such as magnetic sensors.

[0003] Properties such as the morphology, crystal quality, and magnetic domains of the functional layer in a sensor are important parameters for measuring the performance of a magnetic sensor. For flexible magnetic sensors, studying the regulation of stress on microscopic parameters such as the morphology, magnetic domains, and crystal quality of the functional layer of the sensor is the basis for fabricating magnetic sensors with excellent performance.

[0004] Currently, the main instruments for material microscopic testing include laser confocal microscopes, scanning probe microscopes, magneto-optical Kerr microscopes, and scanning electron microscopes, etc. Although the existing mechanical property testing platforms have achieved automation and intelligence, due to the large size and high cost of traditional equipment, they cannot be used normally in conjunction with microscopic imaging instruments (such as laser confocal microscopes, scanning probe microscopes, magneto-optical Kerr microscopes, and scanning electron microscopes), and it is impossible to perform tensile stress testing on small samples (usually referring to the functional layer in a sensor, which is a thin film material) under a microscopic imaging instrument.

[0005] Based on this, there is an urgent need for a stretching device that is miniaturized, compatible with microscopic imaging instruments, and suitable for in-situ stretching testing of small samples. Summary of the Invention

[0006] In view of the above problems, the purpose of the present invention is to provide a thin film stretching device to solve the problem that the existing mechanical property testing platform cannot perform tensile stress testing on small samples under a microscopic imaging instrument.

[0007] The thin film stretching device provided by the present invention includes a connecting frame and a stretching frame. The connecting frame includes a first connecting plate and a second connecting plate. The stretching frame includes a reverse threaded rod rotatably connected between the first connecting plate and the second connecting plate. A first sliding plate and a second sliding plate are respectively screwed onto the reverse threaded rod through a first thread and a second thread; wherein, the thread directions of the first thread and the second thread are opposite; and,

[0008] A first pressing strip is provided on the first sliding plate, and a second pressing strip is provided on the second sliding plate. One end of the thin film sample to be stretched is fixed to the first sliding plate through the first pressing strip, and the other end of the thin film sample to be stretched is fixed to the second sliding plate through the second pressing strip.

[0009] In addition, preferably, a first sliding rod and a second sliding rod are further provided between the first connecting plate and the second connecting plate, and the first sliding rod and the second sliding rod are respectively on both sides of the reverse threaded rod; wherein, both sides of the first sliding plate are respectively slidably connected to the first sliding rod and the second sliding rod, and both sides of the second sliding plate are respectively slidably connected to the first sliding rod and the second sliding rod.

[0010] In addition, preferably, a first blind hole, a first through hole, and a second through hole are formed in the first connecting plate, wherein the first through hole and the second through hole are respectively on both sides of the first blind hole;

[0011] A fifth through hole, a third through hole, and a fourth through hole are formed in the second connecting plate, wherein the third through hole and the fourth through hole are respectively on both sides of the fifth through hole; and,

[0012] One end of the reverse threaded rod is rotatably connected in the first blind hole, and the other end of the reverse threaded rod passes through the fifth through hole and extends outside the second connecting plate; both ends of the first sliding rod are respectively arranged in the first through hole and the third through hole, and both ends of the second sliding rod are respectively arranged in the second through hole and the fourth through hole.

[0013] In addition, preferably, an eighth threaded through hole, a sixth through hole, and a seventh through hole are formed in the first sliding plate, wherein the sixth through hole and the seventh through hole are respectively on both sides of the eighth threaded hole;

[0014] A ninth threaded through hole, an eighth through hole, and a ninth through hole are formed in the second sliding plate, wherein the eighth through hole and the ninth through hole are respectively on both sides of the ninth threaded through hole; and,

[0015] The reverse threaded rod is screwed to the eighth threaded through hole through the first thread, the reverse threaded rod is screwed to the ninth threaded through hole through the second thread, the first sliding rod is slidably connected to the first sliding plate through the sixth through hole, the first sliding rod is slidably connected to the second sliding plate through the eighth through hole, the second sliding rod is slidably connected to the first sliding plate through the seventh through hole, and the second sliding rod is slidably connected to the second sliding plate through the ninth through hole.

[0016] In addition, preferably, a micrometer knob is fixedly connected to one end of the reverse threaded rod outside the second connecting plate; wherein,

[0017] A first cutting surface is provided at one end of the reverse threaded rod outside the second connecting plate. A second blind hole is formed in the side surface of the micrometer knob, and a threaded blind hole communicating with the second blind hole is formed in the outer wall of the micrometer knob. The first cutting surface is inserted into the second blind hole and fixedly connected with the threaded blind hole through a setscrew.

[0018] In addition, a preferred solution is that the connecting frame further includes a first stabilizing plate and a second stabilizing plate. A first kidney-shaped hole is formed in the first stabilizing plate, and a second kidney-shaped hole is formed in the second stabilizing plate. Moreover, at both ends of the inner side of the first connecting plate, a first fixing plate and a second fixing plate are fixed. A fourth threaded through hole is formed in the first fixing plate, and a fifth threaded through hole is formed in the second fixing plate. At both ends of the inner side of the second connecting plate, a third fixing plate and a fourth fixing plate are fixed. A sixth threaded through hole and a seventh threaded through hole are formed in the third fixing plate. Among them,

[0019] Both ends of the first stabilizing plate are fixedly connected with the first fixing plate and the third fixing plate respectively through the first kidney-shaped hole in cooperation with the fourth threaded through hole and the sixth threaded through hole. Both ends of the second stabilizing plate are fixedly connected with the second fixing plate and the fourth fixing plate respectively through the second kidney-shaped hole in cooperation with the fifth threaded through hole and the seventh threaded through hole.

[0020] In addition, a preferred solution is that a movable scale is marked on the micrometer knob, and a positioning rod corresponding to the movable scale is fixed on the second connecting plate. And,

[0021] A fixed scale is marked on the first stabilizing plate.

[0022] In addition, a preferred solution is that a first threaded through hole is formed in the first connecting plate, a second threaded through hole and a third threaded through hole are formed in the second connecting plate. The to-be-stretched thin film sample is adjusted and kept horizontal based on the three-point method through the first threaded through hole, the second threaded through hole, the third threaded through hole and in cooperation with setscrews.

[0023] In addition, a preferred solution is that a second cutting surface is connected to the upper surface of the second sliding plate. The second cutting surface is kept horizontal based on the three-point method through the first threaded through hole, the second threaded through hole, the third threaded through hole and in cooperation with setscrews, and the to-be-stretched thin film sample is placed on the second cutting surface.

[0024] In addition, in a preferred embodiment, a third waist-shaped hole is provided on the first connecting plate, and a fourth waist-shaped hole is provided on the second connecting plate. The first connecting plate is fixed to an external material testing platform through the third waist-shaped hole in cooperation with a setscrew, and the second connecting plate is fixed to the material testing platform through the fourth waist-shaped hole in cooperation with a setscrew.

[0025] Compared with the prior art, the film stretching device for in-situ observation test provided by the present invention drives the first sliding plate and the second sliding plate to move away from each other by rotating the reverse threaded rod, so as to perform in-situ stretching on the film fixed between the first sliding plate and the second sliding plate through the first pressing strip and the second pressing strip; by controlling the reverse rotation of the reverse threaded rod, the first sliding plate and the second sliding plate can be driven to move towards each other, so as to accurately release the tensile stress of the film, thereby realizing the tensile stress test of small samples under a microscopic imaging instrument.

[0026] To achieve the above and related purposes, one or more aspects of the present invention include features that will be described in detail later and specifically pointed out in the claims. The following description and the accompanying drawings illustrate certain exemplary aspects of the present invention in detail. However, these aspects only indicate some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the following description in conjunction with the accompanying drawings and the content of the claims, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the drawings:

[0028] Figure 1 is a schematic structural diagram of the film stretching device provided by the present invention;

[0029] Figure 2 is a reverse structural diagram of the film stretching device provided by the present invention;

[0030] Figure 3 is a schematic structural diagram of the first connecting plate in the film stretching device provided by the present invention;

[0031] Figure 4 is a schematic structural diagram of the second connecting plate in the film stretching device provided by the present invention;

[0032] Figure 5 is a schematic structural diagram of the first stabilizing plate and the second stabilizing plate in the film stretching device provided by the present invention (the first stabilizing plate and the second stabilizing plate have the same structure);

[0033] Figure 6It is a schematic structural diagram of the first sliding rod and the second sliding rod in the film stretching device provided by the present invention (the first sliding rod and the second sliding rod have the same structure);

[0034] Figure 7 It is a schematic structural diagram of the reverse threaded rod in the film stretching device provided by the present invention;

[0035] Figure 8 It is a schematic structural diagram of the first sliding plate in the film stretching device provided by the present invention;

[0036] Figure 9 It is a schematic structural diagram of the second sliding plate in the film stretching device provided by the present invention;

[0037] Figure 10 It is a schematic structural diagram of the first pressing strip and the second pressing strip in the film stretching device provided by the present invention (the first pressing strip and the second pressing strip have the same structure);

[0038] Figure 11 It is a schematic structural diagram of the micrometer knob in the film stretching device provided by the present invention;

[0039] Reference numerals: 100, first connecting plate; 101, first through hole; 102, second through hole; 103, first blind hole; 104, first threaded through hole; 105, fourth threaded through hole; 106, fifth threaded through hole; 110, second connecting plate; 111, third through hole; 112, fourth through hole; 113, fifth through hole; 114, second threaded through hole; 115, third threaded through hole; 116, sixth threaded through hole; 117, seventh threaded through hole; 118, positioning rod; 120, first stabilizing plate; 130, second stabilizing plate; 200, first sliding rod; 210, second sliding rod; 220, reverse threaded rod; 221, first thread; 222, second thread; 223, first cutting surface; 230, first sliding plate; 231, sixth through hole; 232, seventh through hole; 233, eighth threaded through hole; 240, second sliding plate; 241, eighth through hole; 242, ninth through hole; 243, ninth threaded through hole; 244, second cutting surface; 250, first pressing strip; 260, second pressing strip; 270, micrometer knob; 271, second blind hole; 272, threaded blind hole.

[0040] In all the drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed embodiments

[0041] In the following description, for purposes of explanation, in order to provide a thorough understanding of one or more embodiments, numerous specific details are set forth. However, it is apparent that the embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; in addition, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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.

[0043] Figure 1 The structure of the film stretching device provided by the present invention is shown. Figure 2 The reverse structure of the film stretching device provided by the present invention is shown. Figure 3 The structure of the first connecting plate in the film stretching device provided by the present invention is shown. Figure 4 The structure of the second connecting plate in the film stretching device provided by the present invention is shown. Figure 5 The structures of the first stabilizing plate and the second stabilizing plate in the film stretching device provided by the present invention are shown. Figure 6 The structures of the first sliding rod and the second sliding rod in the film stretching device provided by the present invention are shown. Figure 7 The structure of the reverse threaded rod in the film stretching device provided by the present invention is shown. Figure 8 The structure of the first sliding plate in the film stretching device provided by the present invention is shown. Figure 9 The structure of the second sliding plate in the film stretching device provided by the present invention is shown. Figure 10 The structures of the first pressing strip and the second pressing strip in the film stretching device provided by the present invention are shown. Figure 11 The structure of the micrometer knob in the film stretching device provided by the present invention is shown.

[0044] Combined with Figures 1 to 11It can be seen that the film stretching device provided by the present invention includes a connecting frame and a stretching frame. The connecting frame serves as the basic support structure of the entire film stretching device, and the stretching frame is mainly used to stretch the film sample to be stretched.

[0045] Specifically, the connecting frame mainly includes a first connecting plate 100 and a second connecting plate 110 on the left and right sides. The first connecting plate 100 and the second connecting plate 110 correspond to each other left and right. The stretching frame mainly includes a reverse threaded rod 220 rotatably connected between the first connecting plate 100 and the second connecting plate 110. The reverse threaded rod 220 can rotate between the first connecting plate 100 and the second connecting plate 110. And a first thread 221 and a second thread 222 are provided on the reverse threaded rod 220. The reverse threaded rod 220 is screwed with a first slide plate 230 and a second slide plate 240 through the first thread 221 and the second thread 222 respectively. Among them, the thread directions of the first thread 221 and the second thread 222 are opposite. In the actual operation process, due to the opposite thread directions of the first thread 221 and the second thread 222, when the reverse threaded rod 220 is rotated, the first slide plate 230 and the second slide plate 240 will move towards each other (such as when the reverse threaded rod 220 rotates forward) or move in the opposite direction (such as when the reverse threaded rod 220 rotates backward) under the action of the thread.

[0046] In addition, to fix the film sample to be stretched, a first pressing strip 250 is provided on the first slide plate 230, and a second pressing strip 260 is provided on the second slide plate 240. In the actual operation process, both ends of the film sample to be tested are respectively placed between the first pressing strip 250 and the first slide plate 230 and between the second pressing strip 260 and the second slide plate 240. Then, one end of the film sample to be stretched is fixed (clamped and fixed) to the first slide plate 230 through the first pressing strip 250 by a matching countersunk screw, and the other end of the film sample to be stretched is fixed (clamped and fixed) to the second slide plate 240 through the second pressing strip 260, so as to fix the film sample to be tested and prevent the film sample to be tested from sliding. At this time, if the reverse threaded rod 220 is rotated in the reverse direction, the first slide plate 230 and the second slide plate 240 will move away from each other under the action of the thread. As the first slide plate 230 and the second slide plate 240 move away from each other, the film sample to be stretched will be stretched, which is convenient for subsequent tensile tests. If the reverse threaded rod 220 is rotated forward, the first slide plate 230 and the second slide plate 240 will move towards each other under the action of the thread. As the first slide plate 230 and the second slide plate 240 approach each other, the tensile stress on the stretched film sample is released, which is convenient for subsequent tensile tests.

[0047] In addition, to facilitate guiding the first slide plate 230 and the second slide plate 240 during their movement, a first sliding rod 200 and a second sliding rod 210 can be further provided between the first connecting plate 100 and the second connecting plate 110. The first sliding rod 200 and the second sliding rod 210 are respectively located on both sides of the reverse threaded rod 220. Among them, both sides of the first slide plate 230 are respectively slidably connected to the first sliding rod 200 and the second sliding rod 210, and both sides of the second slide plate 240 are respectively slidably connected to the first sliding rod 200 and the second sliding rod 210. Through this design, when the first slide plate 230 and the second slide plate 240 move towards each other or in opposite directions, horizontal guiding can be provided for the first slide plate 230 and the second slide plate 240, ensuring the translational movement of the first slide plate 230 and the second slide plate 240 on the horizontal plane, and preventing the first slide plate 230 and the second slide plate 240 from rotating with the reverse threaded rod 220.

[0048] Specifically, to install the reverse threaded rod 220, the first sliding rod 200, and the second sliding rod 210, a first blind hole 103, a first through hole 101, and a second through hole 102 can be opened on the first connecting plate 100. Among them, the first through hole 101 and the second through hole 102 are respectively located on both sides of the first blind hole 103. A fifth through hole 113, a third through hole 111, and a fourth through hole 112 are opened on the second connecting plate 110. Among them, the third through hole 111 and the fourth through hole 112 are respectively located on both sides of the fifth through hole 113. One end of the reverse threaded rod 220 is rotatably connected in the first blind hole 103, and the other end of the reverse threaded rod 220 passes through the fifth through hole 113 and extends outside the second connecting plate 110. Both ends of the first sliding rod 200 are respectively arranged in the first through hole 101 and the third through hole 111, and both ends of the second sliding rod 210 are respectively arranged in the second through hole 102 and the fourth through hole 112.

[0049] It should be noted that both ends of the first sliding rod 200 and the second sliding rod 210 respectively abut against the first through hole 101, the second through hole 102 of the first connecting plate 100, the third through hole 111, and the fourth through hole 112 of the second connecting plate 110. And, threads are provided at both ends of the first sliding rod 200 and the second sliding rod 210 and fixed with matching hexagonal nuts to realize connecting the connecting frame and the stretching frame. Both ends of the reverse threaded rod 220 respectively abut against the first blind hole 103 of the first connecting plate 100 and the fourth through hole 112 of the second connecting plate 110, restricting the horizontal displacement of the reverse threaded rod 220 during the stretching process, which can maintain the stability of the film stretching device and avoid shaking and torsion.

[0050] More specifically, to install the first sliding plate and the second sliding plate, an eighth threaded through-hole 233, a sixth through-hole 231, and a seventh through-hole 232 may be formed in the first sliding plate 230. Among them, the sixth through-hole 231 and the seventh through-hole 232 are respectively located on both sides of the eighth threaded hole. An ninth threaded through-hole 243, an eighth through-hole 241, and a ninth through-hole 242 are formed in the second sliding plate 240. Among them, the eighth through-hole 241 and the ninth through-hole 242 are respectively located on both sides of the ninth threaded through-hole 243. And, the reverse threaded rod 220 is screwed to the eighth threaded through-hole 233 through the first thread 221, the reverse threaded rod 220 is screwed to the ninth threaded through-hole 243 through the second thread 222. The first sliding rod 200 is slidably connected to the first sliding plate 230 through the sixth through-hole 231, the first sliding rod 200 is slidably connected to the second sliding plate through the eighth through-hole 241. The second sliding rod 210 is slidably connected to the first sliding plate through the seventh through-hole 232, and the second sliding rod 210 is slidably connected to the second sliding plate through the ninth through-hole 242.

[0051] In addition, to precisely adjust the reverse threaded rod 220, a micrometer knob 271 may be fixedly connected to one end of the reverse threaded rod 220 outside the second connecting plate 110. And, a first cutting surface 223 is provided at one end of the reverse threaded rod 220 outside the second connecting plate 110. A second blind hole 271 is formed on the side surface of the micrometer knob 271, and a threaded blind hole 272 communicating with the second blind hole 271 is formed on the outer wall of the micrometer knob 271. The first cutting surface 223 is inserted into the second blind hole 271 and fixedly connected to the threaded blind hole 272 through a set screw, so as to realize the rotation of the reverse threaded rod 220 by rotating the micrometer knob 271.

[0052] The film stretching device provided by the present invention can drive the first sliding plate 230 and the second sliding plate 240 to move away from each other by controlling the rotation of the micrometer knob 271 to rotate the reverse threaded rod 220, and perform in-situ stretching on the film sample to be stretched fixed between the first sliding plate 230 and the second sliding plate 240. The micrometer knob 271 is marked with movable scales, and the distance between the first sliding plate 230 and the second sliding plate 240 can be quantitatively regulated with high precision by controlling the rotation amount of the micrometer knob 271, so as to precisely stretch the film. In addition, by controlling the reverse rotation of the micrometer knob 271 to rotate the reverse threaded rod 220, the first sliding plate 230 and the second sliding plate 240 can be driven to move towards each other, and the stretching stress on the film sample to be stretched can be precisely released.

[0053] In a specific embodiment of the present invention, to achieve a stable connection between the first connecting plate 100 and the second connecting plate 110, the connecting frame may further include a first stabilizing plate 120 and a second stabilizing plate 130. A first waist-shaped hole (not marked in the figure) is provided on the first stabilizing plate 120, and a second waist-shaped hole (not marked in the figure) is provided on the second stabilizing plate 130. Moreover, a first fixing plate and a second fixing plate are fixed at both ends of the inner side of the first connecting plate 100. A fourth threaded through-hole 105 is provided on the first fixing plate, and a fifth threaded through-hole 106 is provided on the second fixing plate. A third fixing plate and a fourth fixing plate are fixed at both ends of the inner side of the second connecting plate 110. A sixth threaded through-hole 116 and a seventh threaded through-hole 117 are provided on the third fixing plate. Among them, both ends of the first stabilizing plate 120 are fixedly connected to the first fixing plate and the third fixing plate respectively through the first waist-shaped hole in cooperation with the fourth threaded through-hole 105 (fixed with a countersunk head screw) and the sixth threaded through-hole 116 (fixed with a countersunk head screw). Both ends of the second stabilizing plate 130 are fixedly connected to the second fixing plate and the fourth fixing plate respectively through the second waist-shaped hole in cooperation with the fifth threaded through-hole 106 (fixed with a countersunk head screw) and the seventh threaded through-hole 117 (fixed with a countersunk head screw).

[0054] The film stretching device provided by the present invention connects the first connecting plate 100 and the second connecting plate 110 through the first stabilizing plate 120 and the second stabilizing plate 130. When operating the sample stretching, the stability of the film stretching device can be maintained, and shaking and torsion can be avoided.

[0055] In a preferred embodiment of the present invention, a movable scale (not marked in the figure) may also be marked on the micrometer knob, and a positioning rod 118 corresponding to the movable scale is fixed on the second connecting plate 110. Moreover, a fixed scale (not marked in the figure) is marked on the first stabilizing plate 120. During the actual operation process, the positioning rod 118 cooperates with the movable scale of the micrometer and the fixed scale of the first stabilizing plate 120 to precisely control the distance between the first slide plate 230 and the second slide plate 240 by rotating the micrometer knob 271, so as to precisely stretch the film.

[0056] Specifically, when the micrometer knob 271 is rotated clockwise, the first slide plate 230 and the second slide plate 240 move away from each other on the first slide rod 200 and the second slide rod 210, increasing the distance and controlling the stretching of the film; when the micrometer knob 271 is rotated counterclockwise, the first slide plate 230 and the second slide plate 240 move towards each other on the first slide rod 200 and the second slide rod 210, shortening the distance and controlling the restoration of the stretched state of the film. The initial distance between the first slide plate 230 and the second slide plate 240 is read through the fixed scale on the first stabilizing plate 120; the distance of the relative displacement between the first slide plate 230 and the second slide plate 240 is controlled by the movable scale marked on the micrometer knob 271 and the positioning rod 118 of the second connecting plate 110, precisely controlling the tensile strain of the film.

[0057] In addition, to improve the test accuracy, a first threaded 221 through hole 104 is provided on the first connecting plate 100, and a second threaded 222 through hole 114 and a third threaded through hole 115 are provided on the second connecting plate 110; during the actual operation process, the first threaded 221 through hole 104 on the first connecting plate 100, the second threaded 222 through hole 114 and the third threaded through hole 115 on the second connecting plate 110 can be matched with corresponding set screws, and the plane of the film stretching device is adjusted by the three-point method to ensure that the film is parallel to the horizontal plane during stretching; and, to facilitate adjusting the angle of the film sample to be stretched, a second cutting surface 244 can be connected to the upper surface of the second slide plate 240, and the second cutting surface 244 is kept horizontal based on the three-point method by the first threaded 221 through hole 104, the second threaded 222 through hole 114, the third threaded through hole 115 and the set screws, and the film sample to be stretched is placed on the second cutting surface 244 to keep the film surface horizontal during the stretching process.

[0058] In addition, to realize the fixed connection of the entire device to the material test platform (scanning probe microscope, magneto-optical Kerr microscope, scanning electron microscope, laser confocal microscope, etc.) of the department, a third waist-shaped hole (usually two are provided, not marked in the figure) can be opened on the first connecting plate 100, and a fourth waist-shaped hole (usually two are provided, not marked in the figure) is opened on the second connecting plate 110. The first connecting plate 100 is fixed to the external material test platform through the third waist-shaped hole and counter-sunk screws, and the second connecting plate 110 is fixed to the material test platform through the fourth waist-shaped hole and counter-sunk screws.

[0059] As described above with reference to Figures 1 to 11 The film stretching device according to the present invention is described by way of example. However, those skilled in the art should understand that various improvements can be made to the above-mentioned film stretching device proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the appended claims.

Claims

1. A film stretching device, comprising a connecting frame and a stretching frame, characterized in that The connecting frame includes a first connecting plate and a second connecting plate. The stretching frame includes a reverse threaded rod rotatably connected between the first connecting plate and the second connecting plate. A first sliding plate and a second sliding plate are respectively screwed on the reverse threaded rod through a first thread and a second thread; wherein, the thread directions of the first thread and the second thread are opposite; and, A first pressing strip is arranged on the first sliding plate, and a second pressing strip is arranged on the second sliding plate. One end of the thin film sample to be stretched is fixed to the first sliding plate through the first pressing strip, and the other end of the thin film sample to be stretched is fixed to the second sliding plate through the second pressing strip.

2. The thin film stretching device according to claim 1, wherein A first sliding rod and a second sliding rod are further arranged between the first connecting plate and the second connecting plate. The first sliding rod and the second sliding rod are respectively on both sides of the reverse threaded rod; wherein, both sides of the first sliding plate are respectively slidably connected to the first sliding rod and the second sliding rod, and both sides of the second sliding plate are respectively slidably connected to the first sliding rod and the second sliding rod.

3. The thin film stretching device according to claim 2, wherein A first blind hole, a first through hole and a second through hole are formed in the first connecting plate. The first through hole and the second through hole are respectively on both sides of the first blind hole; A fifth through hole, a third through hole and a fourth through hole are formed in the second connecting plate. The third through hole and the fourth through hole are respectively on both sides of the fifth through hole; and, One end of the reverse threaded rod is rotatably connected in the first blind hole, and the other end of the reverse threaded rod penetrates through the fifth through hole and extends outside the second connecting plate; both ends of the first sliding rod are respectively arranged in the first through hole and the third through hole, and both ends of the second sliding rod are respectively arranged in the second through hole and the fourth through hole.

4. The thin film stretching device according to claim 3, wherein An eighth threaded through hole, a sixth through hole and a seventh through hole are formed in the first sliding plate. The sixth through hole and the seventh through hole are respectively on both sides of the eighth threaded hole; A ninth threaded through hole, an eighth through hole and a ninth through hole are formed in the second sliding plate. The eighth through hole and the ninth through hole are respectively on both sides of the ninth threaded through hole; and, The reverse threaded rod is screwed to the eighth threaded through hole through the first thread, the reverse threaded rod is screwed to the ninth threaded through hole through the second thread, the first sliding rod is slidably connected to the first sliding plate through the sixth through hole, the first sliding rod is slidably connected to the second sliding plate through the eighth through hole, the second sliding rod is slidably connected to the first sliding plate through the seventh through hole, and the second sliding rod is slidably connected to the second sliding plate through the ninth through hole.

5. The thin film stretching device according to claim 4, wherein A micrometer knob is fixedly connected to the end of the reverse threaded rod outside the second connecting plate; wherein, A first cutting surface is provided at one end of the reverse threaded rod outside the second connecting plate. A second blind hole is formed in the side surface of the micrometer knob, and a threaded blind hole communicating with the second blind hole is formed in the outer wall of the micrometer knob. The first cutting surface is inserted into the second blind hole and fixedly connected to the threaded blind hole through a setscrew.

6. The film stretching device according to claim 5, wherein the connecting frame further includes a first stabilizing plate and a second stabilizing plate. A first kidney-shaped hole is formed in the first stabilizing plate, and a second kidney-shaped hole is formed in the second stabilizing plate. Moreover, at both ends of the inner side of the first connecting plate, a first fixing plate and a second fixing plate are fixed. A fourth threaded through-hole is formed in the first fixing plate, and a fifth threaded through-hole is formed in the second fixing plate. At both ends of the inner side of the second connecting plate, a third fixing plate and a fourth fixing plate are fixed. A sixth threaded through-hole and a seventh threaded through-hole are formed in the third fixing plate. Among them, both ends of the first stabilizing plate are fixedly connected to the first fixing plate and the third fixing plate respectively through the first kidney-shaped hole in cooperation with the fourth threaded through-hole and the sixth threaded through-hole; both ends of the second stabilizing plate are fixedly connected to the second fixing plate and the fourth fixing plate respectively through the second kidney-shaped hole in cooperation with the fifth threaded through-hole and the seventh threaded through-hole.

7. The film stretching device according to claim 6, wherein a movable scale is marked on the micrometer knob, and a positioning rod corresponding to the movable scale is fixed on the second connecting plate. Moreover, a fixed scale is marked on the first stabilizing plate.

8. The film stretching device according to claim 7, wherein a first threaded through-hole is formed in the first connecting plate, and a second threaded through-hole and a third threaded through-hole are formed in the second connecting plate. The film sample to be stretched is adjusted and kept horizontal based on the three-point method through the cooperation of the first threaded through-hole, the second threaded through-hole, the third threaded through-hole and the setscrew.

9. The film stretching device according to claim 8, wherein a second cutting surface is connected to the upper surface of the second slide plate. The second cutting surface is kept horizontal based on the three-point method through the cooperation of the first threaded through-hole, the second threaded through-hole, the third threaded through-hole and the setscrew, and the film sample to be stretched is placed on the second cutting surface.

10. The film stretching device according to any one of claims 1 to 9, wherein a third kidney-shaped hole is formed in the first connecting plate, and a fourth kidney-shaped hole is formed in the second connecting plate. The first connecting plate is fixed to an external material testing platform through the cooperation of the third kidney-shaped hole and the setscrew, and the second connecting plate is fixed to the material testing platform through the cooperation of the fourth kidney-shaped hole and the setscrew.

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