Protective device for piezoelectric film sensor
By adopting sliding connection and limiting mechanism in the piezoelectric thin film sensor protection device, the problem of sliding out of the second protective case is solved, and more stable protection and convenient maintenance are achieved, ensuring the stability and sensitivity of the sensor.
Patent Information
- Application Number
- CN202420867749.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-24
AI Technical Summary
The existing piezoelectric thin film sensor protection device lacks fixed parts, which causes the second protective case to slide out in the storage state, reducing the protection effect.
A protective device including an outer protective case and an inner protective case is designed, using sliding connection, a limiting mechanism and a fixing mechanism. Through the cooperation of the limiting block and spring, the inner protective case is ensured to be fixed on the inside of the outer protective case and provides convenient Disassembly and install.
It effectively avoids the inner protective case from sliding out from the inside of the outer protective case, simplifies operation and maintenance, ensures the stability and sensitivity of the sensor, and facilitates replacement and maintenance.
Smart Images
Figure CN222212071U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensor protection, in particular to a protection device for a piezoelectric film sensor. Background Art
[0002] When a piece of piezoelectric polyvinylidene fluoride PVDF polymer film (piezoelectric film) is stretched or bent, an electrical signal (charge or voltage) will be generated between the upper and lower electrode surfaces of the film, and it is proportional to the deformation of stretching or bending. Generally, piezoelectric materials are sensitive to pressure, but for piezoelectric films, when a small force is applied longitudinally, a large stress will be generated in the lateral direction. If the same force is applied to a large area of the film, the stress generated will be much smaller. The existing piezoelectric film sensors are very thin and the electrical connection of the sensor is crimped, which is easy to deform and crease during use. These undesirable factors will not only reduce the sensitivity of the sensor, but also cause the connection of the sensor to fall off, resulting in sensor failure and other undesirable conditions.
[0003] For example, the Chinese patent publication number CN216954582U discloses a protective device structure for a piezoelectric film sensor, including: a protective shell, a protective jacket; a through hole is provided on the first side plate of the protective shell; the protective jacket includes an open end and a closed end opposite to each other, the open end is used to allow the piezoelectric film sensor to pass through it and be accommodated in the protective jacket, the open end is located in the protective shell, and the closed end is located outside the protective shell through the through hole. The utility model adheres and fixes the piezoelectric film sensor through the jacket, and the protective shell sleeves and fixes the open end of the entire jacket, so that a protective layer is formed on the outside of the entire piezoelectric film sensor, thereby solving the problem that the piezoelectric film sensor is easily affected by deformation or creases during use.
[0004] The existing technology has the following problems:
[0005] There is no fixing component between the first protective shell and the second protective shell of the protection device, which causes the second protective shell to move flexibly inside the first protective shell. In the stored state, the second protective shell may slide out of the first protective shell, resulting in greatly reduced protection of the second protective shell by the first protective shell. Utility Model Content
[0006] The utility model provides a protective device for a piezoelectric film sensor to solve the problems raised in the above background technology.
[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0008] A protective device for a piezoelectric film sensor comprises an outer protective shell, the inner side of which is slidably connected to an inner protective shell, the left end of the outer protective shell is fixedly connected to a connector, the upper side of the inner protective shell is threadedly connected to a fixing mechanism, the upper side of the outer protective shell is slidably connected to two limiting mechanisms symmetrically distributed on the left and right, the right side of the outer protective shell near the upper side is fixedly connected to a limiting plate by screws, and the upper side of the fixing mechanism is movably sleeved with a piezoelectric film sensor body.
[0009] Preferably, the fixing mechanism includes a fixing screw, the outer wall of the fixing screw is threadedly connected to the left side of the inner protective shell near the middle near the lower side, and two fixing screws are symmetrically distributed front and back, and a plurality of linearly distributed blocks are fixedly connected to the inner lower surface of the inner protective shell near the front and rear sides, the piezoelectric film sensor body is movably sleeved on the outside of the block near the front and rear sides, and the left end of the piezoelectric film sensor body is movably sleeved on the outside of the fixing screw.
[0010] Preferably, two copper bars symmetrically distributed front to back are embedded in the inner lower surface of the inner protective shell, and two brushes symmetrically distributed front to back are fixedly connected to the lower surface of the inner protective shell near the left end, and the lower side of the brush is overlapped on the upper side of the copper bar.
[0011] Preferably, a sealing plate is slidably connected to the front and rear surfaces of the inner side of the inner protective shell near the upper side, a first spring is fixedly connected to the inner lower surface of the front and rear walls of the inner protective shell near the right end, and a clamping column is fixedly connected to the upper side of the two first springs. Two clamping grooves symmetrically distributed front and back are opened on the upper surface of the sealing plate near the right end, and the outer side of the clamping column is movably sleeved with the inner side of the clamping groove.
[0012] Preferably, wedge-shaped grooves are provided at the inner lower left edges of the two card slots and at the front and rear sides of the left side of the sealing plate, and the left and right wedge-shaped grooves on the same side are symmetrical.
[0013] Preferably, the limiting mechanism includes a push plate, the front and rear sides of the sealing plate are slidably connected to the upper side of the outer protective shell near the left and right sides, the lower side of the push plate is fixedly connected to a connecting plate through a column, and the connecting plate is located on the inner side of the outer protective shell, and two first limiting rods symmetrically on the left and right are movably sleeved at the middle boss on the lower side of the connecting plate, the front and rear ends of the first limiting rods are fixedly connected to the bosses on the inner upper surface of the outer protective shell near the left and right sides, the outer walls of the two first limiting rods are movably sleeved with second springs, and the second springs are located on the front side of the boss on the lower side of the connecting plate.
[0014] Preferably, two front-to-back symmetrical limit assemblies are fixedly connected to the lower surface of the connecting plate near the front and rear sides, and the limit assembly includes a second limit rod, the upper end of the second limit rod is fixedly connected to the lower side of the connecting plate near the front and rear ends, and two second limit rods are symmetrically distributed front to back, a second limit block is movably sleeved on the outer side of the second limit rod, the second limit block is triangular in shape, and the inclined surface of the second limit block faces the middle part of the outer protective shell, the outer walls of the two second limit rods are movably sleeved with a third spring, and the third spring is located on the upper side of the second limit block, and the upper surface of the inner protective shell near the left end is fixedly connected with four first limit blocks distributed in a rectangular shape, the first limit block is triangular in shape, and the inclined surfaces of the left and right first limit blocks on the same side face the side close to each other.
[0015] Preferably, friction patterns are provided on the upper side of the push plate.
[0016] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:
[0017] 1. The utility model provides a protective device for a piezoelectric film sensor, which adopts an outer protective shell, an inner protective shell, a limit mechanism, a push plate, a connecting plate, a first limit rod, a second spring, a first limit block, a limit assembly, a second limit rod, a second limit block and a third spring. By pushing the inner protective shell toward the inner side of the outer protective shell, the vertical surface of the second limit block on the right side is made to fit the vertical surface of the first limit block on the right side, so that the inner protective shell is fixed to the inner side of the outer protective shell to prevent the inner protective shell from sliding out from the inner side of the outer protective shell. When the outer protective shell needs to be pulled out, it only needs to slide the push plate toward the front side to release the restriction of the second limit block on the first limit block. The operation is convenient and the structure is simple.
[0018] 2. The utility model provides a protective device for a piezoelectric film sensor, which adopts the cooperation of a piezoelectric film sensor body, a limit plate, an inner protective shell, a fixing mechanism, a fixing screw, a clamping block, a sealing plate, a clamping column, a clamping groove, a first spring and a wedge-shaped groove. By removing the limit plate and pressing the clamping column downward, the sealing plate is pulled out from the inner side of the inner protective shell, and the fixing screw is rotated to remove the fixing screw, so that the piezoelectric film sensor body is removed as a whole. The disassembly is convenient and the installation is convenient. When the piezoelectric film sensor body or other components of the entire protective device are damaged, they can be quickly replaced, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model in the storage state;
[0021] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;
[0022] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the inner protective shell of the utility model;
[0023] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure of the middle A part;
[0024] Figure 6 It is a three-dimensional structural schematic diagram of the push plate part of the utility model.
[0025] In the figure: 1. outer protective shell; 2. inner protective shell; 3. connector; 4. fixing mechanism; 41. fixing screw; 42. clamping block; 43. sealing plate; 44. clamping column; 45. clamping slot; 46. first spring; 47. copper bar; 48. brush; 49. wedge groove; 5. limiting mechanism; 51. push plate; 52. connecting plate; 53. first limiting rod; 54. second spring; 55. first limiting block; 56. limiting assembly; 561. second limiting rod; 562. second limiting block; 563. third spring; 6. limiting plate; 7. piezoelectric film sensor body. DETAILED DESCRIPTION
[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0027] like Figure 1 , Figure 2 As shown, a protective device for a piezoelectric film sensor comprises an outer protective shell 1, an inner protective shell 2 is slidably connected to the inner side of the outer protective shell 1, a connector 3 is fixedly connected to the left end of the outer protective shell 1, a fixing mechanism 4 is threadedly connected to the upper side of the inner protective shell 2, two limiting mechanisms 5 symmetrically distributed on the left and right are slidably connected to the upper side of the outer protective shell 1, a limiting plate 6 is fixedly connected to the right side of the outer protective shell 1 near the upper side by screws, and a piezoelectric film sensor body 7 is movably sleeved on the upper side of the fixing mechanism 4.
[0028] It should be noted that the connector 3 is used to be connected to a device that receives the signal of the piezoelectric film sensor body 7 so as to achieve the purpose of transmitting the signal of the piezoelectric film sensor body 7 .
[0029] like Figure 3-Figure 5As shown, the fixing mechanism 4 includes a fixing screw 41, the outer wall of the fixing screw 41 is threadedly connected to the left side of the inner protective shell 2 near the middle near the lower side, and two fixing screws 41 are symmetrically distributed front and back, and a plurality of linearly distributed blocks 42 are fixedly connected to the inner lower surface of the inner protective shell 2 near the front and rear sides, the piezoelectric film sensor body 7 is movably sleeved on the outside of the block 42 near the front and rear sides, and the left end of the piezoelectric film sensor body 7 is movably sleeved on the outside of the fixing screw 41.
[0030] It should be noted that the block 42 is used to fix the front and rear sides of the piezoelectric film sensor body 7 to prevent the piezoelectric film sensor body 7 from moving inside the inner protective shell 2, and the fixing screw 41 is used to fix the left side of the piezoelectric film sensor body 7 and is connected to the positive and negative poles of the piezoelectric film sensor body 7.
[0031] like Figure 3 , Figure 4 As shown, two copper bars 47 symmetrically distributed front to back are embedded in the inner lower surface of the inner protective shell 2, and two brushes 48 symmetrically distributed front to back are fixedly connected to the lower surface of the inner protective shell 2 near the left end, and the lower side of the brush 48 overlaps the upper side of the copper bar 47.
[0032] It should be noted that the fixing screw 41 and the brush 48 are connected by a wire, the copper bar 47 and the connector 3 are connected by a wire, and the signal generated by the piezoelectric film sensor body 7 is transmitted to the brush 48 through the fixing screw 41, and then transmitted to the connector 3 through the copper bar 47. The use of the copper bar 47 to transmit the signal avoids the problem of the wire being squeezed and twisted on the inner side of the outer protective shell 1 when using a wire.
[0033] like Figure 3 , Figure 4 As shown, a sealing plate 43 is slidably connected to the front and rear surfaces of the inner side of the inner protective shell 2 near the upper side, a first spring 46 is fixedly connected to the inner lower surface of the front and rear walls of the inner protective shell 2 near the right end, and a clamping column 44 is fixedly connected to the upper side of the two first springs 46. Two clamping grooves 45 symmetrically distributed front and back are opened on the upper surface of the sealing plate 43 near the right end, and the outer side of the clamping column 44 is movably sleeved on the inner side of the clamping groove 45.
[0034] It should be noted that the first spring 46 pushes the card post 44 upward. When the card post 44 is located inside the card slot 45, the sealing plate 43 is fixed and cannot be pulled out. The sealing plate 43 is used to close the upper side of the piezoelectric film sensor body 7 to prevent the piezoelectric film sensor body 7 from falling off from the outer side of the block 42. Pressing the card post 44 downward causes the card post 44 to disengage from the card slot 45, causing the sealing plate 43 to be pulled out.
[0035] like Figure 5As shown, wedge-shaped grooves 49 are provided at the inner lower left edges of the two slots 45 and at the front and rear sides of the left side of the sealing plate 43, and the left and right wedge-shaped grooves 49 on the same side are symmetrical.
[0036] It should be noted that the setting of the wedge-shaped groove 49 allows the clamping column 44 to not be completely pressed down. When the upper surface of the clamping column 44 is lower than the upper edge of the wedge-shaped groove 49, the sealing plate 43 can be pulled out, which facilitates the removal of the sealing plate 43.
[0037] like Figure 2 , Figure 6 As shown, the limiting mechanism 5 includes a push plate 51, and the front and rear sides of the sealing plate 43 are slidably connected to the upper side of the outer protective shell 1 near the left and right sides. The lower side of the push plate 51 is fixedly connected to a connecting plate 52 through a column, and the connecting plate 52 is located on the inner side of the outer protective shell 1, and two left-right symmetrical first limiting rods 53 are movably sleeved at the boss in the middle part of the lower side of the connecting plate 52. The front and rear ends of the first limiting rods 53 are fixedly connected to the bosses on the inner upper surface of the outer protective shell 1 near the left and right sides. The outer walls of the two first limiting rods 53 are movably sleeved with second springs 54, and the second springs 54 are located on the front side of the boss on the lower side of the connecting plate 52.
[0038] It should be noted that pushing the push plate 51 forward can cause the push plate 51 to move forward, loosen the connecting plate 52, and the second spring 54 pushes the connecting plate 52 backward, causing the push plate 51 to return to its original position.
[0039] like Figure 4 , Figure 6 As shown, two limit assemblies 56 symmetrically arranged front and rear are fixedly connected to the lower surface of the connecting plate 52 near the front and rear sides, and the limit assembly 56 includes a second limit rod 561, the upper end of the second limit rod 561 is fixedly connected to the lower side of the connecting plate 52 near the front and rear ends, and two second limit rods 561 are symmetrically distributed front and rear, and a second limit block 562 is movably sleeved on the outer side of the second limit rod 561, and the second limit block 562 is in the shape of a triangle, and the inclined surface of the second limit block 562 faces the middle part of the outer protective shell, and the outer walls of the two second limit rods 561 are movably sleeved with a third spring 563, and the third spring 563 is located on the upper side of the second limit block 562, and the upper surface of the inner protective shell 2 near the left end is fixedly connected with four first limit blocks 55 distributed in a rectangular shape, and the first limit block 55 is in the shape of a triangle, and the inclined surfaces of the left and right first limit blocks 55 located on the same side face the side close to each other.
[0040] It should be noted that when the inner protective shell 2 is stored inside the outer protective shell 1, the vertical surface of the second limit block 562 on the limit mechanism 5 on the left side is in contact with the vertical surface of the first limit block 55 on the right side, so that the inner protective shell 2 is fixed to the inner side of the outer protective shell 1. When the connecting plate 52 moves forward, the second limit block 562 is separated from the positive side surface of the first limit block 55, so that the inner protective shell 2 is no longer restricted, and the inner protective shell 2 is pulled outward, so that the first limit block 55 pushes the second limit block 562 on the limit mechanism 5 on the right side until the vertical surface of the first limit block 55 on the left side is in contact with the vertical surface of the second limit block 562 on the limit mechanism 5 on the right side, so that the inner protective shell 2 is fixed.
[0041] like Figure 6 As shown, the upper side of the push plate 51 is provided with friction patterns.
[0042] It should be noted that the friction pattern is used to increase the friction pattern between the hand and the push plate 51 , making it easier for the user to push the push plate 51 .
[0043] The working principle of the utility model is as follows: first, the push plate 51 is pushed forward, so that the push plate 51 can drive the push plate 51 to move forward, loosen the connecting plate 52, and the second spring 54 pushes the connecting plate 52 backward, causing the push plate 51 to reset. When the inner protective shell 2 is stored in the inner side of the outer protective shell 1, the vertical surface of the second limit block 562 on the limiting mechanism 5 on the left side is in contact with the vertical surface of the first limit block 55 on the right side, so that the inner protective shell 2 is fixed to the inner side of the outer protective shell 1. When the connecting plate 52 moves forward, the second limit block 562 is separated from the positive side of the first limit block 55, so that the inner protective shell 2 is no longer restricted, and the inner protective shell 2 is pulled outward, causing the first limit block 55 to be The block 55 pushes the second limiting block 562 on the limiting mechanism 5 on the right side until the vertical surface of the first limiting block 55 on the left side fits the vertical surface of the second limiting block 562 on the limiting mechanism 5 on the right side, so that the inner protective shell 2 is fixed. By pushing the inner protective shell 2 toward the inner side of the outer protective shell 1, the vertical surface of the second limiting block 562 on the right side fits the vertical surface of the first limiting block 55 on the right side, so that the inner protective shell 2 is fixed to the inner side of the outer protective shell 1, preventing the inner protective shell 2 from sliding out from the inner side of the outer protective shell 1. When the outer protective shell 1 needs to be pulled out, it is only necessary to slide the push plate 51 to the front side to release the second limiting block 562 from the first limiting block 562. The limit block 55 is limited, the operation is convenient, and the structure is simple. Finally, the block 42 is used to fix the front and rear sides of the piezoelectric film sensor body 7 to prevent the piezoelectric film sensor body 7 from moving inside the inner protective shell 2. The fixing screw 41 is used to fix the left side of the piezoelectric film sensor body 7 and is connected to the positive and negative electrodes of the piezoelectric film sensor body 7 at the same time. The first spring 46 pushes the card column 44 upward. When the card column 44 is located inside the card slot 45, the sealing plate 43 is fixed and cannot be pulled out. The sealing plate 43 is used to close the upper side of the piezoelectric film sensor body 7 to prevent the piezoelectric film sensor body 7 from falling off from the outside of the block 42. Press the card column 44 downward so that The clamping column 44 is disengaged from the clamping slot 45, causing the sealing plate 43 to be pulled out. The setting of the wedge-shaped groove 49 allows the clamping column 44 to not be completely pressed down. When the upper surface of the clamping column 44 is lower than the upper edge of the wedge-shaped groove 49, the sealing plate 43 can be pulled out, which facilitates the disassembly of the sealing plate 43. By removing the limit plate 6 and pressing the clamping column 44 downward, the sealing plate 43 is pulled out from the inner side of the inner protective shell 2, and the fixing screw 41 is turned to remove the fixing screw 41, so that the piezoelectric film sensor body 7 is removed as a whole, which is convenient for disassembly and installation. When the piezoelectric film sensor body 7 or other components of the entire protective device are damaged, they can be quickly replaced, which is convenient for maintenance.
[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A protective device for a piezoelectric film sensor, comprising an outer protective shell (1), characterized in that: The inner side of the outer protective shell (1) is slidably connected to the inner protective shell (2), the left end of the outer protective shell (1) is fixedly connected to a connector (3), the upper side of the inner protective shell (2) is threadedly connected to a fixing mechanism (4), the upper side of the outer protective shell (1) is slidably connected to two limit mechanisms (5) symmetrically distributed on the left and right, the right side of the outer protective shell (1) is fixedly connected to a limit plate (6) by screws near the upper side, and the upper side of the fixing mechanism (4) is movably sleeved with a piezoelectric film sensor body (7).
2. A protective device for a piezoelectric film sensor according to claim 1, characterized in that: The fixing mechanism (4) comprises a fixing screw (41), the outer wall of the fixing screw (41) being threadedly connected to a position near the lower side of the left side of the inner protective shell (2) near the middle, and two fixing screws (41) are symmetrically distributed front and rear, and a plurality of linearly distributed clamping blocks (42) are fixedly connected to the inner lower surface of the inner protective shell (2) near the front and rear sides, the piezoelectric film sensor body (7) is movably sleeved on the outer side of the clamping block (42) near the front and rear sides, and the left end of the piezoelectric film sensor body (7) is movably sleeved on the outer side of the fixing screw (41).
3. A protective device for a piezoelectric film sensor according to claim 2, characterized in that: Two copper bars (47) symmetrically distributed frontward and rearward are embedded in the inner lower surface of the inner protective shell (2), and two brushes (48) symmetrically distributed frontward and rearward are fixedly connected to the lower surface of the inner protective shell (2) near the left end, and the lower side of the brush (48) overlaps the upper side of the copper bar (47).
4. A protective device for a piezoelectric film sensor according to claim 2, characterized in that: A sealing plate (43) is slidably connected to the front and rear surfaces of the inner side of the inner protective shell (2) near the upper side, and a first spring (46) is fixedly connected to the inner lower surface of the front and rear walls of the inner protective shell (2) near the right end. The upper sides of the two first springs (46) are fixedly connected to a clamping column (44). Two clamping grooves (45) symmetrically distributed front and back are opened on the upper surface of the sealing plate (43) near the right end, and the outer side of the clamping column (44) is movably sleeved with the inner side of the clamping groove (45).
5. A protective device for a piezoelectric film sensor according to claim 4, characterized in that: Wedge-shaped grooves (49) are provided at the lower left edges of the inner sides of the two clamping grooves (45) and at the front and rear sides of the left side of the sealing plate (43), and the left and right wedge-shaped grooves (49) on the same side are symmetrical.
6. A protective device for a piezoelectric film sensor according to claim 4, characterized in that: The limiting mechanism (5) comprises a push plate (51), the front and rear sides of the sealing plate (43) are slidably connected to the upper side of the outer protective shell (1) near the left and right sides, the lower side of the push plate (51) is fixedly connected to a connecting plate (52) through a column, and the connecting plate (52) is located on the inner side of the outer protective shell (1), and two first limiting rods (53) symmetrically on the left and right are movably sleeved at the middle boss on the lower side of the connecting plate (52), the front and rear ends of the first limiting rods (53) are fixedly connected to the bosses on the inner upper surface of the outer protective shell (1) near the left and right sides, and the outer walls of the two first limiting rods (53) are movably sleeved with second springs (54), and the second springs (54) are located on the front side of the boss on the lower side of the connecting plate (52).
7. A protective device for a piezoelectric film sensor according to claim 6, characterized in that: Two front-to-back symmetrical limiting assemblies (56) are fixedly connected to the lower surface of the connecting plate (52) near the front and rear ends. The limiting assembly (56) comprises a second limiting rod (561). The upper end of the second limiting rod (561) is fixedly connected to the lower side of the connecting plate (52) near the front and rear ends. Two second limiting rods (561) are symmetrically distributed in the front and rear ends. The outer side of the second limiting rod (561) is movably sleeved with a second limiting block (562). The second limiting block (562) is in the shape of a triangle. The inclined surfaces of the second limit blocks (562) face the middle part of the outer protective shell (1); the outer walls of the two second limit rods (561) are movably sleeved with third springs (563), and the third springs (563) are located on the upper side of the second limit blocks (562); four first limit blocks (55) distributed in a rectangular shape are fixedly connected to the upper surface of the inner protective shell (2) near the left end; the first limit blocks (55) are triangular in shape, and the inclined surfaces of the left and right first limit blocks (55) located on the same side face the side close to each other.
8. A protective device for a piezoelectric film sensor according to claim 6, characterized in that: The upper side of the push plate (51) is provided with friction patterns.