Thermal protector with protection structure

Abstract

The invention relates to the technical field of thermal protectors, in particular to a thermal protector with a protection structure, which comprises a thermal protector body and two wires, the thermal protector body is sleeved with a shell, the front end of the shell is provided with a front cover, the front cover is provided with a pre-tightening opening, and the section of the pre-tightening opening gradually retracts from the inside of the front cover to the outside of the front cover. The outer portions of the wires are fixedly sleeved with pre-tightening parts matched with the inner shapes of the pre-tightening openings, when the wires move towards the outer portion of the front cover, the pre-tightening parts move along with the wires and abut against the inner walls of the pre-tightening openings, and a first clamping block capable of clamping the outer portions of the two wires at the same time is arranged at the center of the side, away from the pre-tightening openings, of the inner portion of the front cover. A linkage mechanism is arranged between the first clamping blocks and the pre-tightening part, when the pre-tightening part moves outwards along with the wire, the linkage mechanism drives the two first clamping blocks to clamp the outer portion of the corresponding wire at the same time, and the stability of the thermal protector body in use is further improved through mutual cooperation of the pre-tightening part, the first clamping blocks and the linkage mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of thermal protectors, and in particular to a thermal protector with a protective structure. Background Art

[0002] In the operation of power systems and electronic equipment, thermal protectors are widely used as an important safety component to prevent equipment from being damaged or causing fires due to overheating. Thermal protectors monitor the heat generated when current passes through, and when the temperature exceeds the preset safety threshold, they can automatically cut off the circuit, thereby protecting the circuit and connected equipment from damage. However, traditional thermal protectors have some shortcomings in design and installation, especially in terms of wire connection and fixing.

[0003] Chinese patent publication number CN219832512U discloses a thermal protector with a protective structure, the protective mechanism includes a protector connection seat and a protective shell, the thermal protector is arranged on the rear side of the protector connection seat through a signal terminal plug, a connection jack is arranged on the front side of the protective shell, the protective shell is arranged on the outside of the thermal protector through the connection jack, the protector connection seat and the protective shell constitute a shielding protection structure, a mounting seat is arranged on the upper part of the protective shell, the protector is provided with a protective mechanism outside the thermal protector, the protective mechanism forms a closed protective structure outside the thermal protector, which can reduce the impact of the external environment on the thermal protector, improve the working stability and service life of the thermal protector, and a mounting seat is arranged on the upper part of the protective shell, so that the installation of the thermal protector is more convenient, and the protective mechanism and the thermal protector have an excellent connection fit, which can further improve the fixing effect of the thermal protector. However, this connection method is prone to loosening of the wires due to the influence of factors such as vibration and temperature changes during long-term use, and is prone to loosening or poor contact, thereby affecting the performance and reliability of the thermal protector. Therefore, the present invention proposes a thermal protector for firmly connecting the wires. Summary of the invention

[0004] In view of the above problems, a thermal protector with a protective structure is provided, in which a pre-tightening part cooperates with a pre-tightening opening arranged on a front cover. Since the cross-sectional shape of the pre-tightening opening is gradually indented, a certain tightening force can be exerted on the pre-tightening part to prevent the wire from loosening or falling off during normal use. The clamping block is connected to the pre-tightening part through a linkage mechanism. When the wire moves slightly due to changes in the external environment, the pre-tightening part will move accordingly and trigger the clamping block through the linkage mechanism. The clamping block will then clamp the wire, further increasing the stability of the thermal protector body during use.

[0005] To solve the problems of the prior art, the present invention provides a thermal protector with a protective structure, comprising a thermal protector body and two wires arranged on the thermal protector body, the outer sleeve of the thermal protector body is provided with an outer shell, the front end of the outer shell is provided with a detachable front cover, the front cover is provided with a pre-tightening opening for each wire to pass through, the cross-section of the pre-tightening opening is gradually retracted from the inside of the front cover to the outside of the front cover, the external fixed sleeve of the wire is provided with a pre-tightening part that matches the shape of the inside of the pre-tightening opening, when the wire moves toward the outside of the front cover, the pre-tightening part moves accordingly and abuts against the inner wall of the pre-tightening opening, a first clamping block that can simultaneously clamp the outside of the two wires is provided at the center of one side of the inside of the front cover away from the pre-tightening opening, a linkage mechanism is provided between the first clamping block and the pre-tightening part, when the pre-tightening part moves outward with the wire, the linkage mechanism simultaneously drives the two first clamping blocks to clamp the outside of the wire.

[0006] Preferably, the inner wall of the pre-tightening opening of the front cover is covered with a first rubber sleeve, and the outside of the pre-tightening portion is wrapped with a second rubber sleeve capable of abutting against the outside of the first rubber sleeve.

[0007] Preferably, a drive bin is fixedly provided at the inner center of the front cover near the outer shell, and the drive bin is rectangular in shape. The drive bin is located at the center between the two wires, and the two first clamping blocks are respectively arranged on both sides of the outside of the drive bin, and a drive shaft extending toward the inside of the drive bin is provided on one side of the first clamping block close to the drive bin, and a drive sleeve for moving the drive shaft is provided on the drive bin. A linkage mechanism is arranged inside the drive bin and is respectively connected to the pre-tightening part and the drive shaft in transmission. When the pre-tightening part moves along the pre-tightening mouth, each drive shaft can be driven to move in the direction of the wire and clamp its outside through the linkage mechanism.

[0008] Preferably, the inner wall of the front cover is provided with a second clamping block corresponding to each first clamping block, and the first clamping block and the second clamping block are respectively provided with a clamping groove for clamping the outside of the wire.

[0009] Preferably, the inner walls of the clamping grooves of the first clamping block and the second clamping block are covered with a second rubber layer, and the outside of the first rubber layer is provided with a plurality of protrusions capable of abutting against the outside of the wire.

[0010] Preferably, the linkage mechanism includes a linkage plate which is vertically arranged inside the driving bin and one side of which faces the pre-tensioning port of the front cover. A pull rope which can pull the linkage plate to move accordingly is arranged on the outside of each pre-tensioning portion. A through hole is arranged on the driving bin for the pull rope to pass through. Two driving shafts are symmetrically arranged on both sides of the linkage plate. A first linkage block is arranged at one end of each driving shaft close to the linkage plate. Second linkage blocks which can respectively slide with the two first linkage blocks and are used to drive the corresponding driving shaft to move along the axis of the driving sleeve to the outside of the driving bin are arranged on both sides of the linkage plate.

[0011] Preferably, a cylindrical groove recessed toward the outer shell is provided at the center of the linkage plate, a fixing column coaxial with the cylindrical groove is provided inside the cylindrical groove, two ends of the fixing column are respectively fixedly connected to the inner two sides of the driving bin, a limiting hole for the fixing column to pass through is provided at the inner center of the cylindrical groove, a first spring capable of moving the linkage plate along the axis of the fixing column toward the outer shell is sleeved on the outside of the fixing column, and two ends of the first spring are respectively abutted against the inside of the cylindrical groove and the inner side wall of the linkage plate.

[0012] Preferably, a first inclined surface inclined toward the direction of the linkage plate is provided on a side of the second linkage block facing the corresponding first linkage block, and a second inclined surface capable of slidingly cooperating with the first inclined surface is provided on a side of the first linkage block close to the second linkage block. A second spring is provided on the outer sleeve of the driving shaft, and both ends of the second spring are respectively abutted against one side of the corresponding first linkage block and the inner side of the driving bin.

[0013] Preferably, each driving shaft is provided with a strip-shaped limit block distributed along its own axial direction on the outside, and each driving sleeve corresponding to the driving shaft is provided with a strip-shaped limit groove for the strip-shaped limit block to move on the inner ring.

[0014] Preferably, a baffle capable of abutting the front side of the thermal protector body is disposed inside the front cover, and a third rubber layer capable of contacting the front exterior of the thermal protector body is disposed on a side of the baffle close to the thermal protector body.

[0015] Preferably, a card block is arranged around the outside of the shell close to the front cover, a card slot matching the card block is arranged on the inner side of the front cover, a detachable cover plate is arranged on one side of the front cover, a first bolt hole is arranged on the cover plate, a second bolt hole corresponding to the first bolt hole is arranged inside the front cover, and the second bolt hole and the first bolt are connected by a fixing screw.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the pre-tightening opening provided on the front cover through the pre-tightening part. Since the cross-sectional shape of the pre-tightening opening is gradually indented, a certain tightening force can be generated on the pre-tightening part to prevent the wire from loosening or falling off during normal use. The first clamping block is connected to the pre-tightening part through a linkage mechanism. When the wire moves slightly due to changes in the external environment, the pre-tightening part will move accordingly and trigger the clamping block through the linkage mechanism. The first clamping block then clamps the wire, further increasing the stability of the thermal protector body during use.

[0017] 2. The present invention quickly transmits the force to the drive shaft through a linkage mechanism. When the pre-tightening part moves along the pre-tightening opening, the linkage mechanism converts the movement of the drive shaft into the movement of the drive shaft through mechanical transmission according to the moving distance of the pre-tightening part. As the drive shaft moves, the first clamping block moves toward the direction of the corresponding wire and clamps the corresponding wire to the outside to ensure the stability and safety of the connection.

[0018] 3. The present invention moves the first clamping block toward the second clamping block, and the wire is placed in the clamping grooves of the first clamping block and the second clamping block. The first clamping block and the second clamping block fit tightly, and the outside of the wire is clamped by the corresponding clamping groove squeezing action, further preventing the wire from loosening or falling off.

[0019] 4. The present invention drives the linkage plate to move through the pull rope connected to the pre-tightening part, and the second linkage blocks on both sides of the linkage plate will contact the corresponding first linkage blocks. The second linkage blocks can slide with the first linkage blocks. Therefore, when the linkage plate moves, the second linkage blocks will slide along the surface of the first linkage blocks. The movement of the linkage plate converts the force into movement of the drive shaft along the axis of the drive sleeve through the interaction between the second linkage block and the first linkage block. Since the two drive shafts are symmetrically arranged, the two drive shafts move toward the outside of the drive compartment at the same time. As the drive shaft moves outward, the first clamping block connected to it also moves accordingly, so that the first clamping block gradually approaches and clamps the wire, thereby preventing potential problems caused by loosening or vibration of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a thermal protector with a protective structure.

[0021] Figure 2 It is a structural exploded diagram of a thermal protector with a protective structure.

[0022] Figure 3 A schematic diagram of the partial three-dimensional structure of a thermal protector with a protective structure Figure 1 .

[0023] Figure 4 A cross-sectional view of a thermal protector having a protective structure.

[0024] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0025] Figure 6 The present invention is a three-dimensional structural cross-sectional view of a thermal protector with a protective structure.

[0026] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0027] Figure 8A schematic diagram of the partial three-dimensional structure of a thermal protector with a protective structure Figure 2 .

[0028] Fig. 9 A schematic diagram of the partial three-dimensional structure of a thermal protector with a protective structure Figure 3 .

[0029] Fig.10 The utility model is a partial three-dimensional structural schematic diagram of a linkage mechanism of a thermal protector with a protective structure.

[0030] The numbers in the figure are: 1, thermal protector body; 11, wire; 2, shell; 21, clamping block; 3, front cover; 31, pre-tightening port; 311, first rubber sleeve; 32, second clamping block; 33, second rubber layer; 331, protrusion; 34, baffle; 341, third rubber layer; 35, clamping groove; 36, cover plate; 361, first bolt hole; 37, second bolt hole; 4, pre-tightening part; 41, second rubber sleeve; 5, The first clamping block; 6, linkage mechanism; 61, linkage plate; 611, cylindrical groove; 612, fixed column; 6121, first spring; 62, pull rope; 63, through-hole; 64, first linkage block; 641, second inclined surface; 65, second linkage block; 651, first inclined surface; 652, limit slider; 7, drive bin; 71, drive shaft; 711, second spring; 712, strip limit block; 72, drive sleeve. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figures 1 to 10 As shown: A thermal protector with a protective structure, comprising a thermal protector body 1 and two wires 11 arranged on the thermal protector body 1, the thermal protector body 1 is externally sleeved with a shell 2, the front end of the shell 2 is provided with a detachable front cover 3, the front cover 3 is provided with a pre-tightening opening 31 for each wire 11 to pass through, the cross-section of the pre-tightening opening 31 is gradually retracted from the inside of the front cover 3 to the outside of the front cover 3, the external fixed sleeve of the wire 11 is provided with a pre-tightening portion 4 that matches the internal shape of the pre-tightening opening 31, when the wire 11 moves toward the outside of the front cover 3, the pre-tightening portion 4 moves accordingly and abuts against the inner wall of the pre-tightening opening 31, and a first clamping block 5 that can simultaneously clamp the outside of the two wires 11 is provided at the center of the side of the inside of the front cover 3 away from the pre-tightening opening 31, a linkage mechanism 6 is provided between the first clamping block 5 and the pre-tightening portion 4, when the pre-tightening portion 4 moves outward with the wire 11, the linkage mechanism 6 simultaneously drives the two first clamping blocks 5 to clamp the corresponding outside of the wire 11.

[0033] The outer shell 2 and the front cover 3 can better seal the thermal protector body 1, improve the sealing type of the thermal protector body 1, prevent external gas or corrosive substances from entering the thermal protector body 1, and avoid malfunctions; when the external wire 11 is pulled during use, the wire 11 will pass through the pre-tightening opening 31 and move outward for a certain distance. At this time, the pre-tightening part 4 fixedly sleeved on the outside of the wire 11 is tightly fitted with the inner wall of the pre-tightening opening 31. Since the cross-sectional shape of the pre-tightening opening 31 is gradually indented, a certain tightening force can be generated on the pre-tightening part 4 to prevent the wire from being 11 becomes loose or falls off during normal use, and the clamp is connected to the pre-tightening part 4 through the linkage mechanism 6. When the wire 11 moves slightly due to changes in the external environment, the pre-tightening part 4 moves accordingly and triggers the clamp through the linkage mechanism 6. The clamp then clamps the wire 11 to further increase the stability of the connection. Through the multiple settings of the pre-tightening port 31, the pre-tightening part 4 and the clamp, the thermal protector body 1 improves the stability and safety of the connection of the wire 11, and reduces electrical failures and safety hazards caused by the loosening or falling off of the wire 11.

[0034] Reference Figure 4 and Figure 5 As shown, the inner wall of the pre-tightening opening 31 of the front cover 3 is covered with a first rubber sleeve 311 , and the outer part of the pre-tightening portion 4 is wrapped with a second rubber sleeve 41 that can abut against the outer part of the first rubber sleeve 311 .

[0035] The first rubber sleeve 311 and the second rubber sleeve 41 have higher friction. Therefore, when the pre-tightening part 4 is inserted into the pre-tightening opening 31, the second rubber sleeve 41 will be in close contact with the first rubber sleeve 311, and the contact surface of the first rubber sleeve 311 and the second rubber sleeve 41 will generate a greater friction force, so that the position of the pre-tightening part 4 in the pre-tightening opening 31 is more stable.

[0036] Reference Figure 6 and Figure 7 As shown: a driving bin 7 is fixedly provided at the inner center of the front cover 3 near the outer shell 2, the driving bin 7 is rectangular, and the driving bin 7 is located at the center between the two wires 11. The two first clamping blocks 5 are respectively arranged on both sides of the outside of the driving bin 7, and a driving shaft 71 extending toward the inside of the driving bin 7 is provided on the side of the first clamping block 5 close to the driving bin 7. A driving sleeve 72 for moving the driving shaft 71 is provided on the driving bin 7. A linkage mechanism 6 is arranged inside the driving bin 7 and is respectively connected to the pre-tightening part 4 and the driving shaft 71. When the pre-tightening part 4 moves along the pre-tightening port 31, each driving shaft 71 can be driven to move toward the corresponding wire 11 and clamp its outside through the linkage mechanism 6.

[0037] The linkage mechanism 6 is arranged inside the driving bin 7, and is respectively connected with the pre-tensioning part 4 and the driving shaft 71. When the pre-tensioning part 4 moves, its kinetic force can be quickly transmitted to the driving shaft 71 through the linkage mechanism 6. When the pre-tensioning part 4 moves along the pre-tensioning opening 31, the linkage mechanism 6 will convert it into movement of the driving shaft 71 through mechanical transmission according to the moving distance of the pre-tensioning part 4. As the driving shaft 71 moves, the first clamp 5 will move toward the direction of the corresponding wire 11 and clamp the corresponding wire 11 to the outside to ensure the stability and safety of the connection.

[0038] Reference Figure 6 and Figure 8 As shown, the inner wall of the front cover 3 is provided with a second clamping block 32 corresponding to each first clamping block 5, and the first clamping block 5 and the second clamping block 32 are respectively provided with a clamping groove for clamping the outside of the wire 11.

[0039] When the wire 11 is clamped, the first clamp block 5 moves toward the direction of the second clamp block 32. At this time, the wire 11 is placed in the clamping groove of the first clamp block 5 and the second clamp block 32. The first clamp block 5 and the second clamp block 32 fit tightly and clamp the outside of the wire 11 through the corresponding clamping groove squeezing action, further preventing the wire 11 from loosening or falling off.

[0040] Reference Figure 8 As shown, the inner walls of the clamping grooves of the first clamping block 5 and the second clamping block 32 are covered with a second rubber layer 33 , and the outer portion of the first rubber layer is provided with a plurality of protrusions 331 that can abut against the outer portion of the wire 11 .

[0041] When the conductor 11 is clamped by the first clamping block 5 and the second clamping block 32, the second rubber layer 33 is provided with a plurality of protrusions 331 on the outside of the conductor 11 that can abut against the outside of the conductor 11, and is in contact with the outside of the conductor 11, so as to increase the contact area and friction between the second rubber layer 33 and the conductor 11, so as to make the clamping effect more stable.

[0042] Reference Figure 4 , Figure 6 and Fig. 9 As shown: the linkage mechanism 6 includes a linkage plate 61 which is vertically arranged inside the driving bin 7 and one side of which faces the pre-tightening port 31 of the front cover 3, and a pull rope 62 which can pull the linkage plate 61 to move accordingly is arranged on the outside of each pre-tightening portion 4, and a through hole 63 for the pull rope 62 to pass through is arranged on the driving bin 7, and two driving shafts 71 are symmetrically arranged on both sides of the linkage plate 61, and a first linkage block 64 is arranged at one end of each driving shaft 71 close to the linkage plate 61, and second linkage blocks 65 which can respectively slide with the two first linkage blocks 64 and are used to drive the corresponding driving shaft 71 to move along the axis of the driving sleeve 72 to the outside of the driving bin 7 are arranged on both sides of the linkage plate 61.

[0043] When the external environment changes and causes the pre-tightening part 4 to move outward along the pre-tightening opening 31, the pull rope 62 outside the pre-tightening part 4 will be pulled accordingly, and the pull rope 62 passes through the through hole 63 on the drive compartment 7, and transmits the pulling force to the linkage plate 61, so that the linkage plate 61 moves. As the linkage plate 61 moves, the second linkage blocks 65 on both sides thereof will contact the corresponding first linkage blocks 64, and the second linkage blocks 65 can slide with the first linkage blocks 64. Therefore, when the linkage plate 61 moves, the second linkage block 65 will slide along the surface of the first linkage block 64. The movement of the linkage plate 61 converts the force into the driving shaft 71 along the linkage block 64 through the interaction between the second linkage block 65 and the first linkage block 64. With the movement of the axis of the driving sleeve 72, since the two driving shafts 71 are symmetrically arranged, the two driving shafts 71 move toward the outside of the driving bin 7 at the same time. As the driving shaft 71 moves outward, the first clamping block 5 connected thereto also moves accordingly, so that the first clamping block 5 gradually approaches and clamps the wire 11, thereby preventing potential problems caused by looseness or vibration of the wire 11; the second linkage block 65 is provided with limit sliders 652 on the upper and lower surfaces, and the upper and lower surfaces inside the driving bin 7 are provided with limit slide grooves for the movement of each limit slider 652. When the second linkage block 65 moves, the limit slide grooves arranged on the driving bin 7 cooperate to make the linkage plate 61 and the two second linkage blocks 65 more stable when moving.

[0044] Reference Figure 4 , Figure 6 and Fig. 9 As shown: a cylindrical groove 611 recessed toward the outer shell 2 is provided at the center of the linkage plate 61, a fixed column 612 axially coaxial with the cylindrical groove 611 is provided inside the cylindrical groove 611, two ends of the fixed column 612 are respectively fixedly connected to the inner two sides of the driving bin 7, a limiting hole for the fixing column 612 to pass through is provided at the inner center of the cylindrical groove 611, a first spring 6121 capable of moving the linkage plate 61 along the axis of the fixing column 612 toward the outer shell 2 is sleeved on the outside of the fixing column 612, and two ends of the first spring 6121 are respectively abutted against the inside of the cylindrical groove 611 and the inner side wall of the linkage plate 61.

[0045] Through the cooperation of the cylindrical groove 611 and the fixed column 612, the stability and directionality of the linkage plate 61 during movement are ensured, and the linkage plate 61 is prevented from being offset. When the linkage plate 61 is moved by the tension of the pull rope 62, the first spring 6121 is in a compressed state and stores elastic potential energy. When the linkage plate 61 is not subjected to tension, the potential energy generated by the first spring 6121 will be released when the tension of the pull rope 62 decreases or disappears, pushing the linkage plate 61 and the two second linkage blocks 65 back to their initial positions.

[0046] Reference Fig.10As shown: the second linkage block 65 has a first inclined surface 651 inclined toward the linkage plate 61 on one side facing the corresponding first linkage block 64, the first linkage block 64 has a second inclined surface 641 slidingly matched with the first inclined surface 651 on one side close to the second linkage block 65, the outer sleeve of the driving shaft 71 is provided with a second spring 711, and the two ends of the second spring 711 are respectively abutted against one side of the corresponding first linkage block 64 and the inner side of the driving chamber 7.

[0047] When the linkage plate 61 is moved by the pulling force, the second linkage block 65 is driven to move together. Since the first inclined surface 651 of the second linkage block 65 is inclined toward the linkage plate 61, when the first inclined surface 651 of the second linkage block 65 contacts the second inclined surface 641 of the first linkage block 64, a sliding component force along the inclined surface direction is generated. The generated sliding component force pushes the first linkage block 64 to move along the axial direction of its corresponding driving sleeve 72, and the potential energy generated by the compression of the second spring 711 abuts against the first linkage block 64, which can ensure that the second inclined surface 641 on the first linkage block 64 and the first inclined surface 651 on the second linkage block 65 are always in a state of sliding contact, so that the first linkage block 64 and the second linkage block 65 can slide and cooperate smoothly.

[0048] Reference Figure 7 and Fig.10 As shown: the outside of each driving shaft 71 is provided with a strip-shaped limit block 712 distributed along its own axial direction, and the inner ring of each driving sleeve 72 corresponding to the driving shaft 71 is provided with a strip-shaped limit groove for the strip-shaped limit block 712 to move.

[0049] When the drive shaft 71 moves along its axial direction under the action of external force, the strip limit block 712 will move accordingly in the strip limit groove, ensuring the stability and directionality of the drive shaft 71 during the movement and preventing it from shifting or rotating. At the same time, the strip limit groove also provides a certain guiding effect for the drive shaft 71, enabling it to move along a predetermined trajectory.

[0050] Reference Figure 6 and Fig. 9 As shown: a baffle 34 capable of abutting the front side of the thermal protector body 1 is arranged inside the front cover 3, and a third rubber layer 341 capable of contacting the front side of the thermal protector body 1 is arranged on one side of the baffle 34 close to the thermal protector body 1.

[0051] The baffle 34 is arranged inside the front cover 3, and can provide a stable abutment surface when the thermal protector body 1 is installed, so that the thermal protector body 1 can be stably arranged inside the shell 2 to prevent the thermal protector body 1 from moving due to external impact or vibration. The third rubber layer 341 can be in close contact with the outside of the front side of the thermal protector body 1, which increases the friction between the two, improves the stability of the connection, and can also absorb impact and vibration to a certain extent.

[0052] Reference Figure 2 As shown: a block 21 is arranged around the outer part of the housing 2 near the front cover 3, a slot 35 matching the block 21 is arranged on the inner side of the front cover 3, a detachable cover plate 36 is arranged on one side of the front cover 3, a first bolt hole 361 is opened on the cover plate 36, a second bolt hole 37 corresponding to the first bolt hole 361 is arranged inside the front cover 3, and the second bolt hole 37 and the first bolt hole 361 are connected by fixing screws.

[0053] The shape and size of the card slot 35 match the card block 21. When the shell 2 and the front cover 3 are combined, the card block 21 can be smoothly inserted into the card slot 35 to achieve a firm connection between the two. A detachable cover plate 36 is provided on one side of the front cover 3 to facilitate maintenance and inspection when necessary. When the cover plate 36 is installed, the fixing screw will pass through the first bolt hole 361 and cooperate with the second bolt hole 37. The cover plate 36 is fixed by tightening the fixing screw to achieve a firm connection between the shell 2 and the front cover 3.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A thermal protector with a protective structure, comprising a thermal protector body (1) and two wires (11) arranged on the thermal protector body (1), the thermal protector body (1) being provided with a shell (2) on the outside, the front end of the shell (2) being provided with a detachable front cover (3), characterized in that: The front cover (3) is provided with a pre-tightening opening (31) for each wire (11) to pass through, the cross section of the pre-tightening opening (31) gradually retracts from the inside of the front cover (3) to the outside of the front cover (3), the external fixing sleeve of the wire (11) is provided with a pre-tightening portion (4) that matches the internal shape of the pre-tightening opening (31), when the wire (11) moves toward the outside of the front cover (3), the pre-tightening portion (4) moves accordingly and abuts against the inner wall of the pre-tightening opening (31), a first clamping block (5) capable of simultaneously clamping the outside of two wires (11) is provided at the center of a side of the inside of the front cover (3) away from the pre-tightening opening (31), a linkage mechanism (6) is provided between the first clamping block (5) and the pre-tightening portion (4), when the pre-tightening portion (4) moves outward with the wire (11), the linkage mechanism (6) simultaneously drives the two first clamping blocks (5) to clamp the outside of the wire (11).

2. A thermal protector with a protective structure according to claim 1, characterized in that: The inner wall of the pre-tightening opening (31) of the front cover (3) is covered with a first rubber sleeve (311), and the outside of the pre-tightening portion (4) is wrapped with a second rubber sleeve (41) capable of abutting against the outside of the first rubber sleeve (311).

3. A thermal protector with a protective structure according to claim 1, characterized in that: A drive bin (7) is fixedly arranged at the inner center of the front cover (3) near the outer shell (2); the drive bin (7) is rectangular in shape and is located at the center between the two wires (11); two first clamping blocks (5) are respectively arranged at two sides of the outside of the drive bin (7); a drive shaft (71) extending toward the inside of the drive bin (7) is arranged on one side of the first clamping block (5) near the drive bin (7); a drive sleeve (72) for the drive shaft (71) to move is arranged on the drive bin (7); a linkage mechanism (6) is arranged inside the drive bin (7) and is respectively connected to the pre-tightening portion (4) and the drive shaft (71); when the pre-tightening portion (4) moves along the pre-tightening opening (31), each drive shaft (71) can be driven to move toward the wire (11) and clamp its outside through the linkage mechanism (6).

4. A thermal protector with a protective structure according to claim 3, characterized in that: The inner wall of the front cover (3) is provided with a second clamping block (32) corresponding to each first clamping block (5), and the first clamping block (5) and the second clamping block (32) are respectively provided with a clamping groove for clamping the outside of the wire (11).

5. A thermal protector with a protective structure according to claim 4, characterized in that: The inner walls of the clamping grooves of the first clamping block (5) and the second clamping block (32) are both covered with a second rubber layer (33), and the outside of the first rubber layer is provided with a plurality of protrusions (331) capable of abutting against the outside of the wire (11).

6. A thermal protector with a protective structure according to claim 3, characterized in that: The linkage mechanism (6) comprises a linkage plate (61) vertically arranged inside the drive chamber (7) and with one side thereof facing the pre-tightening opening (31) of the front cover (3); a pull rope (62) capable of pulling the linkage plate (61) to move accordingly is arranged outside each pre-tightening portion (4); a through opening (63) for the pull rope (62) to pass through is arranged on the drive chamber (7); two drive shafts (71) are symmetrically arranged on both sides of the linkage plate (61); a first linkage block (64) is arranged at one end of each drive shaft (71) close to the linkage plate (61); and second linkage blocks (65) capable of respectively slidably cooperating with the two first linkage blocks (64) and used to drive the corresponding drive shaft (71) to move along the axis of the drive sleeve (72) toward the outside of the drive chamber (7) are arranged on both sides of the linkage plate (61).

7. A thermal protector with a protective structure according to claim 6, characterized in that: A cylindrical groove (611) recessed in the direction of the housing (2) is provided at the center of the linkage plate (61), a fixed column (612) coaxial with the cylindrical groove (611) is provided inside the cylindrical groove (611), two ends of the fixed column (612) are respectively fixedly connected to two sides of the inside of the driving chamber (7), a limiting hole for the fixed column (612) to pass through is provided at the center of the inside of the cylindrical groove (611), a first spring (6121) capable of moving the linkage plate (61) along the axis of the fixed column (612) in the direction of the housing (2) is sleeved on the outside of the fixed column (612), and two ends of the first spring (6121) are respectively arranged to abut against the inside of the cylindrical groove (611) and the inner side wall of the linkage plate (61).

8. A thermal protector with a protective structure according to claim 7, characterized in that: A first inclined surface (651) inclined in the direction of the linkage plate (61) is provided on a surface of the second linkage block (65) facing the corresponding first linkage block (64); a second inclined surface (641) capable of slidably cooperating with the first inclined surface (651) is provided on a surface of the first linkage block (64) close to the second linkage block (65); a second spring (711) is sleeved on the outside of the drive shaft (71); two ends of the second spring (711) are respectively disposed in contact with one side of the corresponding first linkage block (64) and the inner side of the drive chamber (7).

9. A thermal protector with a protective structure according to claim 8, characterized in that: The outside of each driving shaft (71) is provided with a strip-shaped limit block (712) distributed along the axis direction thereof, and the inner ring of each driving sleeve (72) corresponding to the driving shaft (71) is provided with a strip-shaped limit groove for the strip-shaped limit block (712) to move.

10. The thermal protector with a protective structure according to claim 1, characterized in that: A baffle (34) capable of abutting the front side of the thermal protector body (1) is arranged inside the front cover (3), and a third rubber layer (341) capable of contacting the outside of the front side of the thermal protector body (1) is arranged on a side of the baffle (34) close to the thermal protector body (1).

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