TWI846272B - Human machine interface panel and fixing device thereof - Google Patents

Abstract

A human machine interface panel is disclosed and includes a main body and a fixing device. The main body includes a housing and a first surface. The fixing device includes a base, a self-tapping screw and a bottom part. The base is in connection with the housing and has a mounting hole. The self-tapping screw penetrates through the mounting hole, and is interfered with the mounting hole. The bottom part is disposed on an end of the self-tapping screw. A plate is disposed between the bottom part and the first surface. By tightening the self-tapping screw, the bottom part and the displaying screen clamp the plate.

Description

Human-machine interface panel and locking device thereof

The present invention relates to a human-machine interface panel, and in particular to a human-machine interface panel with a locking device, which is easy to install, can avoid panel damage and reduce costs.

Common human machine interface (HMI) panels on the market usually include a main body and a mounting plate. The mounting plate includes a first part and a second part adjacent to each other, wherein the first part is formed by bending the second part at a specific angle. The first part of the mounting plate is fastened to the main body by screws, and the second part of the mounting plate is fastened to the device to be fastened by screws, so that the human machine interface panel is fixed to the device to be fastened. However, the manufacturing cost of the above-mentioned mounting plate is relatively high, and its installation process is relatively complicated and difficult. On the other hand, if the thrust of the screw is too large, the mounting plate or the main body will be sunken and deformed, resulting in damage to the main body, abnormal waterproof function of the main body, or the fixing device cannot clamp the mounting plate and other defects.

Some known human-machine interface panels have a fixing device integrally installed on the main body, and the fixing device is fixed to the device to be attached by screws, so that the human-machine interface panel is fixed to the device to be attached. However, the above-mentioned fixing device has the disadvantages of high manufacturing cost and large size. In addition, when the above-mentioned fixing device is damaged, it needs to be replaced together with the main body, resulting in the disadvantage of high subsequent maintenance cost. Furthermore, the known fixing device is a structure made of metal, which has a high manufacturing cost and high structural strength, and cannot prevent the operator from over-tightening the screws.

In view of this, it is necessary to provide a human-machine interface panel and a locking device thereof to solve the problems faced by the prior art.

The purpose of this case is to provide a human-machine interface panel and a locking device thereof, which has the advantages of being easy to install, avoiding panel damage and reducing costs.

To achieve the aforementioned purpose, one of the broad implementations of the present case is to provide a human-machine interface panel. The human-machine interface panel is suitable for use in combination with a panel and includes a main body and a locking device. The main body includes a shell and a first abutting surface. The shell is disposed on at least a portion of the first abutting surface. The locking device includes a base, a self-tapping screw, and a base. The base is detachably connected to the shell of the main body and includes a mounting hole. The self-tapping screw is passed through the mounting hole and interferes with the mounting hole. The base is disposed at one end of the self-tapping screw. By disposing the panel between the base and the first abutting surface and tightening the self-tapping screw, the base and the first abutting surface clamp the panel and the human-machine interface panel is locked to the panel.

To achieve the aforementioned purpose, another broad implementation of the present case is to provide a locking device. The locking device is applicable to a human-machine interface panel. The human-machine interface panel includes a main body and a plate. The main body includes a shell and a first abutting surface. The shell is disposed on at least a portion of the first abutting surface. The locking device includes a base, a self-tapping screw, and a base. The base is detachably connected to the shell of the main body and includes a mounting hole. The mounting hole passes through the base. The self-tapping screw is penetrated through the mounting hole and interferes with the mounting hole. The base is disposed at one end of the self-tapping screw. By disposing the plate between the base and the first abutting surface and tightening the self-tapping screw, the base and the first abutting surface clamp the plate, and the human-machine interface panel is locked to the plate.

Some typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different aspects without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

Figure 1A is a three-dimensional structural diagram of a human-machine interface panel of an embodiment of the present case, Figure 1B is a rear view of the main body of the human-machine interface panel of Figure 1A, Figure 2A is a three-dimensional structural diagram of the locking device of Figure 1A, Figure 2B is a three-dimensional structural diagram of the locking device of Figure 1A at another viewing angle, Figure 2C is a front view of the locking device of Figure 2A, Figure 2D is a right side view of the locking device of Figure 2A, Figure 2E is a top view of the locking device of Figure 2A, Figure 3 is a cross-sectional structural diagram of the locking device of Figure 2A, and Figure 4 is a structural diagram of the human-machine interface panel of Figure 1A locked to a plate. Please refer to FIG. 1A , a human-machine interface panel 1 of an embodiment of the present case includes a main body 2 and a locking device 3. The main body 2 includes a display screen 21 and a housing 22. The back side of the display screen 21 includes a first abutting surface 21a. Please also refer to FIG. 1B , the housing 22 is disposed on at least a portion of the first abutting surface 21a. As shown in FIG. 1A , FIG. 2A and FIG. 3 , the locking device 3 includes a base 31, a self-tapping screw 32 and a base 33. The base 31 is made of a plastic material and is detachably connected to the housing 22 of the main body 2. The base 31 includes a mounting hole 310, and the mounting hole 310 passes through the base 31. The mounting hole 310 includes a first section 310a and a second section 310b connected to each other. The first hole diameter R1 of the first section 310a is larger than the second hole diameter R2 of the second section 310b. The self-tapping screw 32 is passed through the mounting hole 310 and interferes with the second section 310b of the mounting hole 310. The base 33 is disposed at one end of the self-tapping screw 32 and is close to the second section 310b of the mounting hole 310. As shown in FIG. 1A , FIG. 3 and FIG. 4 , the plate A is disposed between the base 33 of the locking device 3 and the first abutting surface 21 a of the display screen 21 , and the self-tapping screw 32 is tightened by a locking tool so that the base 33 of the locking device 3 and the first abutting surface 21 a of the display screen 21 clamp the plate A, so that the human-machine interface panel 1 is locked to the plate A. The locking tool is, for example, but not limited to, a screwdriver. In the present embodiment, the maximum torque that the interference portion between the self-tapping screw 32 and the second section 310b of the mounting hole 310 can withstand is related to a ratio between the first section 310a and the second section 310b of the mounting hole 310. Therefore, by adjusting the ratio between the first section 310a and the second section 310b of the mounting hole 310, the maximum torque that the interference portion between the self-tapping screw 32 and the second section 310b of the mounting hole 310 can be adjusted to a specific value. In other words, the smaller the adjustment ratio, the smaller the proportion of the first section 310a, and relatively speaking, the more second sections 310b that can interfere with the self-tapping screw 32, that is, a stronger maximum torque can be generated. If the user over-tightens the self-tapping screw 32, the torque borne by the interference portion between the self-tapping screw 32 and the second section 310b exceeds a specific value, and the second section 310b of the mounting hole 310 of the base 31 made of plastic material will be damaged, such as but not limited to broken teeth, so that the self-tapping screw 32 can no longer generate thrust, thereby preventing the plate A or the display screen 21 from being subjected to excessive thrust and being damaged. In addition, in addition to the self-tapping screw 32, the base 31 and the base 33 of the locking device 3 of this embodiment are made of plastic material, such as but not limited to injection molding process, which is low in cost and easy to replace. In this embodiment, the size of the display screen 21 of the main body 2 of the human-machine interface panel 1 is 7 inches, but not limited to this.

FIG. 5 is a schematic diagram of the three-dimensional structure of the base 31 of the locking device 3 of FIG. 2A. As shown in FIG. 2A, FIG. 2B, FIG. 3 and FIG. 5, the base 31 of the locking device 3 of this embodiment includes a top surface 31a, a bottom surface 31b and a plurality of side surfaces 31c. The plurality of side surfaces 31c are respectively connected to the top surface 31a and the bottom surface 31b and are adjacent to each other. The mounting hole 310 penetrates the top surface 31a and the bottom surface 31b of the base 31. The first section 310a of the mounting hole 310 penetrates the top surface 31a. The second section 310b of the mounting hole 310 penetrates the bottom surface 31b. In this embodiment, the area of the top surface 31a is larger than the area of the bottom surface 31b, and the base 31 gradually shrinks from the top surface 31a to the bottom surface 31b, but the present invention is not limited thereto.

As shown in FIG. 2B , the base 31 of the locking device 3 of this embodiment includes two hollow portions 314. The two hollow portions 314 are respectively formed by being recessed from the bottom surface 31b toward the top surface 31a. By providing the hollow portions 314, the base 31 uses less plastic material, thereby achieving the effects of reducing manufacturing costs and reducing the weight of the locking device 3.

FIG. 6 is a schematic diagram of the three-dimensional structure of the self-tapping screw 32 of the locking device 3 of FIG. 2A. As shown in FIG. 2A, FIG. 3 and FIG. 6, the self-tapping screw 32 of the locking device 3 of this embodiment is configured to tap the second section 310b of the mounting hole 310 so that the self-tapping screw 32 and the second section 310b of the mounting hole 310 interfere with each other. The self-tapping screw 32 includes a nut 321, a rod 322 and a thread 323. The rod 322 includes a first end 322a and a second end 322b opposite to each other. The nut 321 is disposed at the first end 322a of the rod 322. The thread 323 is disposed around the rod 322. The second end 322b of the self-tapping screw 32 is rotatably connected to the base 33. In this embodiment, the self-tapping screw 32 is manually locked into the base 33. Of course, in other embodiments, the second end 322b of the self-tapping screw 32 can also be embedded in the injection molding process to form the self-tapping screw 32 and the base 33 into an integrated structure, but it is not limited thereto.

FIG. 7 is a schematic diagram of the three-dimensional structure of the base 33 of the locking device 3 of FIG. 2A. As shown in FIG. 2A, FIG. 2B, FIG. 3 and FIG. 7, the base 33 of the locking device 3 of this embodiment includes a first surface 33a and a second surface 33b arranged opposite to each other. The first surface 33a is arranged in the direction of the self-tapping screw 32. The second end 322b of the self-tapping screw 32 is connected to the first surface 33a of the base 33. The second surface 33b is arranged in the direction away from the self-tapping screw 32. The area of the second surface 33b is larger than the cross-sectional area of the rod 322 of the self-tapping screw 32. As shown in FIG. 4 , the second surface 33b of the larger base 33 abuts against the plate A, so that the pressure on the plate A is smaller, thereby preventing the rod 322 of the self-tapping screw 32 from directly abutting against the plate A with a smaller area and causing damage. In this embodiment, the second surface 33b of the base 33 is arranged at an angle (not shown) with the horizontal plane, but the present invention is not limited thereto.

As shown in FIG. 2B , the base 33 of the locking device 3 of the present embodiment is, for example but not limited to, a plastic part made by an injection molding process, and includes a plurality of recesses 335. The plurality of recesses 335 are formed by being recessed from the second surface 33b of the base 33 toward the first surface 33a. By providing the plurality of recesses 335, the plastic thickness of the base 33 is made thinner, thereby reducing the risk of deformation of the base 33 during the cooling process of injection molding.

As shown in FIG. 3 and FIG. 7 , in this embodiment, the base 33 includes a protrusion 331 and a positioning groove 332. The protrusion 331 is formed by extending from the first surface 33a of the base 33 in a direction perpendicular to the first surface 33a. The positioning groove 332 is formed by being recessed from the surface of the protrusion 331. In one embodiment, the protrusion 331 is disposed around the positioning groove 332. The second end 322b of the self-tapping screw 32 is rotatably connected to the positioning groove 332 to achieve the positioning of the self-tapping screw 32.

As shown in FIGS. 2A, 2B, 2D and 2E, and FIGS. 3 and 5, the base 31 of the locking device 3 of the present embodiment includes two slots 311 and two through-holes 312. The two slots 311 are respectively connected to one of the corresponding through-holes 312. The two slots 311 are respectively formed by the top surface 31a and two opposite side surfaces 31c of the base 31 being recessed inward. Two second abutting surfaces 311a are respectively formed in the two slots 311 and are approximately parallel to the top surface 31a, but not limited thereto. The two through-holes 312 respectively penetrate the second abutting surfaces 311a and the bottom surface 31b of the base 31. As shown in FIG. 3 and FIG. 7 , the base 33 of the locking device 3 of the present embodiment includes two arms 333 and two hooks 334. The two arms 333 are respectively disposed at two opposite sides of the base 33 and are respectively extended from the first surface 33a of the base 33 in a direction away from the first surface 33a. The two hooks 334 are respectively disposed at one end of the two arms 333. The two arms 333 are respectively at least partially penetrated in the corresponding through holes 312 of the base 31. The two hooks 334 are respectively slidably accommodated in one of the corresponding slots 311. When the self-tapping screw 32 is pushed toward the base 33, the base 33 is displaced by the thrust, and the two hooks 334 slide in the corresponding slots 311 respectively until the second surface 33b of the base 33 abuts against the plate A (as shown in FIG. 4), or the hook 334 abuts against the second abutting surface 311a. This prevents the base 33 from falling off the base 31, and limits the movement range of the base 33 to the required specific range. In this way, the human-machine interface panel 1 (as shown in FIG. 1A) of this embodiment can be used to lock to a plate with a thickness between the specific range, and the assembly flexibility is high. In addition, the plate with a thickness greater than or less than the specific range will not be able to implement the locking operation, so as to prevent the human-machine interface panel 1 (as shown in FIG. 1A) from being locked to a device that does not meet the original manufacturer's recommendation. In one embodiment, the specific range is, for example but not limited to, between 1.6 cm and 6 cm.

Figures 8A to 8C are schematic diagrams of the connection of the locking device of the human-machine interface panel of Figure 1A to the main body. As shown in Figures 1A and 8A to 8C, the shell 22 of the main body 2 of this embodiment includes an opening 220 and a receiving space 221. The opening 220 penetrates the shell 22 and is connected to the receiving space 221 and the outside of the shell 22. In this embodiment, the opening 220 is a rectangular hole structure, but is not limited to this. As shown in Figures 2B, 2D, 2E, Figure 5 and Figures 8A to 8C, the base 31 of the locking device 3 of this embodiment includes a buckle 313. The buckle 313 includes a connecting section 313a and a buckle section 313b. The connecting section 313a is connected between the side surface 31c of the base 31 and the buckle section 313b. The length of the connecting section 313a is equal to or greater than the thickness of the shell 22 of the main body 2. In this embodiment, the buckle section 313b is a rectangular cylinder, and its cross section matches the shape of the opening 220 of the shell 22. The buckle section 313b includes a middle portion 313c, a first end portion 313d and a second end portion 313e. The middle portion 313c is connected to the connecting section 313a. The first end portion 313d is formed by extending the middle portion 313c toward the top surface 31a. The second end portion 313e is formed by extending the middle portion 313c toward the bottom surface 31b (i.e., away from the top surface 31a). As shown in FIG. 8A and FIG. 8B , the buckle section 313b of the buckle member 313 passes through the opening 220 of the shell 22 of the main body 2, so that the buckle section 313b of the buckle member 313 is accommodated in the accommodation space 221 of the shell 22, and the connecting section 313a of the buckle member 313 is located in the opening 220 of the shell 22. As shown in FIG. 8C , the base 31 is rotated counterclockwise by a specific angle from FIG. 8A , such as but not limited to 90 degrees, so that the first end 313d and the second end 313e of the buckle section 313b of the buckle member 313 abut against the inner surface of the accommodation space 221 of the shell 22, so that the locking device 3 is buckled on the main body 2. On the contrary, the base 31 connected to the main body 2 is rotated by a specific angle, such as but not limited to 90 degrees, so that the first end 313d and the second end 313e of the buckle section 313b of the buckle 313 are separated from the inner surface of the accommodating space 221 of the shell 22, and then the buckle section 313b of the buckle 313 is pulled out from the opening 220 of the shell 22, so that the locking device 3 can be separated from the main body 2. In this way, the user can easily and quickly fix or remove the locking device 3 from the main body 2 without the need for tools and without destroying the structure of the main body 2. In this embodiment, the imaginary plane formed by the rotation direction of the locking device 3 is parallel to the surface of the shell 22 to which it is connected, but it is not limited to this.

As shown in FIG. 1A , the number of openings 220 of the main body 2 of this embodiment is 4 and evenly distributed on two opposite sides of the housing 22. In one embodiment, the number of locking devices 3 is the same as the number of openings 220 of the housing 22, but the present invention is not limited thereto. In one embodiment, a plurality of locking devices 3 and the first abutting surface 21a of the display screen 21 jointly clamp a single plate, but the present invention is not limited thereto. In one embodiment, a plurality of locking devices 3 and the first abutting surface 21a of the display screen 21 respectively clamp a plurality of plates (not shown), but the present invention is not limited thereto.

FIG. 9 is a schematic diagram of the three-dimensional structure of the main body of the human-machine interface panel of another embodiment of the present invention. Different from the human-machine interface panel 1 shown in FIG. 1A and FIG. 1B, the main body 4 of this embodiment includes a display screen 41. The size of the display screen 41 is 10.1 inches, but not limited to this. The main body 4 of this embodiment includes six openings 420, two openings 420 are respectively set on two opposite sides of the main body 4, and one opening 420 is respectively set on the other two opposite sides of the main body 4, but not limited to this.

In summary, the present invention provides a human-machine interface panel 1 with a locking device 3. By adjusting the ratio of the first section 310a and the second section 310b of the mounting hole 310 of the locking device 3, the maximum torque that the self-tapping screw 32 and the interference portion of the second section 310b can withstand is adjusted to a specific value, thereby preventing the panel or display screen 21 from being damaged by excessive thrust. The base 31 and the base 33 of the locking device 3 are both made of plastic materials, which are low in cost and easy to replace. By using the larger base 33 to abut against the panel, the self-tapping screw 32 is prevented from directly abutting against the display screen 21 with a smaller area, thereby preventing damage caused by the self-tapping screw 32. The second end 322b of the rod 322 of the self-tapping screw 32 is rotatably connected to the positioning groove 332 of the base 33 to achieve the positioning of the self-tapping screw 32. Through the provision of the fastener 313, the locking device 3 can be simply and quickly fixed or removed from the main body without the need for tools and without destroying the main body structure.

This case can be modified in various ways by a person familiar with this technology, but all of them will not deviate from the scope of protection sought by the attached patent application.

1: Human-machine interface panel 2, 4: Main body 21, 41: Display screen 21a: First abutting surface 22: Shell 220, 420: Opening 221: Accommodating space 3, 6: Locking device 31: Base 31a: Top surface 31b: Bottom surface 31c: Side surface 310: Mounting hole 310a: First section 310b: Second section 311: Slot 311a: Second abutting surface 312: Perforation 313: Fastener 313a: Connecting section 313b: Fastener section 313c: Middle section 313d: First end section 313e: Second end section 314: Hollow section 32: self-tapping screw 321: nut 322: rod 322a: first end 322b: second end 323: thread 33: base 33a: first surface 33b: second surface 331: convex part 332: positioning groove 333: arm part 334: hook part 335: concave part A: plate R1: first hole diameter R2: second hole diameter

FIG. 1A is a schematic diagram of the three-dimensional structure of the main body and the locking device of the human-machine interface panel of an embodiment of the present case. FIG. 1B is a rear view of the main body of the human-machine interface panel of FIG. 1A. FIG. 2A is a schematic diagram of the three-dimensional structure of the locking device of FIG. 1A. FIG. 2B is a schematic diagram of the three-dimensional structure of the locking device of FIG. 1A from another viewing angle. FIG. 2C is a front view of the locking device of FIG. 2A. FIG. 2D is a right side view of the locking device of FIG. 2A. FIG. 2E is a top view of the locking device of FIG. 2A. FIG. 3 is a schematic diagram of the cross-sectional structure of the locking device of FIG. 2A. FIG. 4 is a schematic diagram of the structure of the human-machine interface panel of FIG. 1A being locked to a plate. Figure 5 is a three-dimensional structural diagram of the base of the locking device of Figure 2A. Figure 6 is a three-dimensional structural diagram of the self-tapping screw of the locking device of Figure 2A. Figure 7 is a three-dimensional structural diagram of the base of the locking device of Figure 2A. Figures 8A to 8C are schematic diagrams of the locking device of the human-machine interface panel of Figure 1A connected to the main body. Figure 9 is a three-dimensional structural diagram of the main body of the human-machine interface panel of another embodiment of the present case.

1: Human-machine interface panel

2: Subject

21: Display screen

21a: First contact surface

22: Shell

220: Open mouth

221: Storage space

3: Locking device

Claims (12)

A human-machine interface panel is suitable for use in combination with a panel, the human-machine interface panel comprising: a main body, comprising a shell and a first abutting surface, the shell being disposed on at least part of the first abutting surface; and at least one locking device, comprising a base, a self-tapping screw and a base, wherein the base is detachably connected to the shell of the main body and comprises a mounting hole, wherein the self-tapping screw is passed through the mounting hole and interferes with the mounting hole, wherein the base is disposed at one end of the self-tapping screw; wherein, by disposing the panel between the base and the first abutting surface and tightening the self-tapping screw, the base and the first abutting surface clamp the panel, so that the human-machine interface panel is locked to the panel. A human-machine interface panel as described in claim 1, wherein the base is made of plastic material and comprises a top surface, a bottom surface and a plurality of side surfaces, wherein the plurality of side surfaces are respectively connected to the top surface and the bottom surface and are adjacent to each other, wherein the mounting hole penetrates the top surface and the bottom surface of the base, a first section of the mounting hole penetrates the top surface, and a second section of the mounting hole penetrates the bottom surface, wherein the area of the top surface is larger than the area of the bottom surface. A human-machine interface panel as described in claim 2, wherein the base tapers from the top surface to the bottom surface. A human-machine interface panel as described in claim 2, wherein the base includes at least one hollow portion, and the at least one hollow portion is formed by being recessed from the bottom surface toward the top surface. The human-machine interface panel as described in claim 2, wherein the shell of the main body includes at least one opening and a containing space, wherein the at least one opening penetrates the shell and is connected to the containing space and the outside of the shell, and the base includes a buckle, the buckle includes a buckle section, and the cross section of the buckle section matches the shape of the at least one opening of the shell. A human-machine interface panel as described in claim 5, wherein the buckle section includes a middle portion, a first end portion and a second end portion, wherein the middle portion is connected to a connecting section of the buckle, the first end portion is formed by extending the middle portion toward the top surface, and the second end portion is formed by extending the middle portion toward the bottom surface, wherein the buckle section of the buckle passes through the at least one opening of the shell of the main body so that the buckle section of the buckle is accommodated in the accommodating space of the shell, and the connecting section of the buckle is located at the at least one opening of the shell. The base is rotated at a specific angle so that the first end and the second end of the buckle section of the buckle are against an inner surface of the accommodation space of the shell, so that the at least one locking device is buckled on the main body, and the base connected to the main body is rotated at the specific angle so that the first end and the second end of the buckle section of the buckle are separated from the inner surface of the accommodation space of the shell, and then the buckle section of the buckle is separated from the at least one opening of the shell, so that the at least one locking device is detached from the main body. As described in claim 2, the mounting hole has a first section and a second section connected to each other, a first hole diameter of the first section is larger than a second hole diameter of the second section, and the maximum torque that the self-tapping screw and the interference portion of the second section of the mounting hole can withstand is related to a ratio of the first section to the second section of the mounting hole, and the smaller the ratio, the stronger the maximum torque generated. A human-machine interface panel as described in claim 7, wherein the base includes a first surface and a second surface disposed opposite to each other, and the self-tapping screw includes a rod having a first end and a second end, wherein the first surface is disposed toward the self-tapping screw, the second end of the rod of the self-tapping screw is connected to the first surface of the base, the second surface is disposed away from the self-tapping screw, and the area of the second surface is larger than a cross-sectional area of the rod of the self-tapping screw. A human-machine interface panel as described in claim 8, wherein the base of the at least one locking device comprises a plurality of recesses, wherein the plurality of recesses are formed by being recessed from the second surface of the base toward the first surface. A human-machine interface panel as described in claim 8, wherein the base comprises a protrusion and a positioning groove, wherein the protrusion is formed by extending from the first surface of the base in a direction perpendicular to the first surface, wherein the positioning groove is formed by being recessed from the surface of the protrusion, wherein the self-tapping screw is rotatably connected to the positioning groove. A human-machine interface panel as described in claim 8, wherein the base includes at least one slot and at least one through-hole, the at least one slot is connected to the at least one through-hole, wherein the at least one slot is formed by the top surface and the side surface of the base being recessed inward, wherein a second abutting surface is formed in the at least one slot, the at least one through-hole penetrates the second abutting surface and the bottom surface of the base, wherein the base of the at least one locking device includes at least one arm and at least one hook, the at least one arm is arranged on the base, and is connected to the first The surface is extended in a direction away from the first surface, wherein the at least one hook is arranged at one end of the at least one arm, and the at least one arm is at least partially penetrated in the at least one through hole of the base, and the at least one hook is slidably accommodated in the at least one slot, wherein when the self-tapping screw is pushed toward the base, the base is displaced by the thrust, and the at least one hook slides in the at least one slot until the second surface of the base abuts against the at least one plate, or the at least one hook abuts against the second abutting surface. A locking device is applicable to a human-machine interface panel, wherein the human-machine interface panel is structured to be combined with a plate and comprises a main body, wherein the main body comprises a shell and a first abutting surface, wherein the shell is disposed on at least a portion of the first abutting surface, wherein the locking device comprises: a base, detachably connected to the shell of the main body, and comprising a mounting hole, wherein the mounting hole A hole passes through the base; a self-tapping screw is inserted through the mounting hole and interferes with the mounting hole; and a base is arranged at one end of the self-tapping screw; wherein, by arranging the plate between the base and the first abutting surface and tightening the self-tapping screw, the base and the first abutting surface clamp the plate, so that the main body of the human-machine interface panel is locked to the plate.

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