Electric track for round aluminum pipes

Abstract

The utility model discloses a round aluminum pipe electric track which comprises a track body, a transmission structure and a pulley structure, and the transmission structure comprises a driving wheel, a driven wheel, a belt and a driving motor driving the driving wheel to rotate. The belt comprises a first linear section, a second linear section and bent sections, the first linear section and the second linear section are located in the front-back direction, the bent sections are connected with the two ends of the first linear section and the two ends of the second linear section, the driving wheel and the driven wheel are sleeved with the bent sections at the two ends respectively, the pulley structure comprises a first pulley and a second pulley, the first pulley is arranged on the first linear section, and the second pulley is arranged on the second linear section. The curtain is opened and closed by arranging the transmission structure and the tackle structure, the length of the tackle is increased, the connecting arm pulls the two sliding blocks to move, and the two sliding blocks are movably connected through the connecting rod, so that the situation that when the curtain is opened, the curtain blocks the sliding blocks and skews in the rail is avoided; therefore, the whole tackle can smoothly and quickly move linearly, and the whole curtain can move stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to a curtain rail technical field, concretely relates to a round aluminum pipe electric rail. BACKGROUND

[0002] In modern life, the window in the room will be installed with a curtain, the curtain can play the role of shading, can block the sun and strong light in the daytime, can also block the outdoor view, plays the role of protecting privacy, generally speaking, the curtain is opened and closed manually, and with the development of smart home, the electric curtain begins to enter people's life.

[0003] The existing electric curtain contains numerous electronic components, the structure is complex, is difficult to maintain, and the trolley that drags the curtain to move is blocked by the curtain when the curtain needs to be opened, causes the sliding part to be inclined in the rail, makes the trolley not be able to slide smoothly in the rail, causes the curtain to be not moved stably. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a round aluminum pipe electric rail to solve the problems in the above background.

[0005] In order to realize the above-mentioned purpose, the utility model provides a round aluminum pipe electric rail, which comprises a rail, a transmission structure arranged on the rail and a trolley structure driven by the transmission structure to reciprocate along the rail, wherein:

[0006] The rail is respectively connected with a first end cover and a second end cover at both ends, and the first end cover is connected with a driving shell at the lower side;

[0007] The transmission structure comprises a driving wheel arranged in the first end cover, a driven wheel arranged in the second end cover, a belt tensioned between the driving wheel and the driven wheel and a driving motor for driving the driving wheel to rotate, and the driving motor is installed in the driving shell;

[0008] The rail comprises a plurality of rail housings, the rail housing is a cylindrical aluminum pipe, a connecting plate and a bottom plate are horizontally arranged in the rail housing, two stop plates are vertically connected to the bottom of the connecting plate and the top of the bottom plate, the connecting plate and the bottom plate divide the rail housing into an upper long groove, an inner cavity and a lower long groove, a connecting block for connecting the rail housing is clamped in the upper long groove, a plurality of connecting holes are arranged on the connecting block, the stop plates divide the inner cavity into a pulley sliding cavity in the middle and a belt conveying cavity on both sides, and the bottom plate is provided with a sliding channel, and the pulley sliding cavity is communicated with the lower long groove through the sliding channel;

[0009] The belt comprises a first straight section, a second straight section and a curved section connecting the two ends of the first straight section and the second straight section, and the curved sections at both ends are sleeved on the driving wheel and the driven wheel respectively;

[0010] The first end cover and the second end cover are provided with a groove body for the curved section to slide in and out;

[0011] The trolley structure comprises a first trolley and a second trolley, the first trolley is arranged on the first straight section, and the second trolley is arranged on the second straight section;

[0012] The first trolley and the second trolley each comprise a sliding part slidably connected in the track shell, a mounting part mounted on the belt and connected with the sliding part, and a connecting part extending out of the track shell, the sliding part comprises two sliding blocks, the two sliding blocks are movably connected through a connecting rod, sliding grooves corresponding to the bottom plate are formed on the two sides of the sliding blocks, the mounting part comprises two mounting blocks, the two mounting blocks are connected in one-to-one correspondence with the two sliding blocks, and a mounting cavity corresponding to the belt is formed in the mounting block, and the connecting part comprises a connecting arm, and the connecting arm is threadedly connected with the side surface of the sliding block.

[0013] Optionally, the first end cover and the second end cover each comprise an upper cover body and a lower cover body, the upper cover body is sleeved on the end of the track shell, an upper groove body is arranged in the upper cover body, the lower cover body is connected to the bottom of the upper cover body through screws, and a lower groove body is arranged in the lower cover body, and the lower groove body and the upper groove body form the groove body.

[0014] Optionally, the first end cover and the second end cover are each connected with a decorative head away from the track shell.

[0015] Optionally, the first end cover further comprises a spring mounted between the upper cover body and the lower cover body and a movable button movably connected to the lower cover body, and the bottom of the spring is connected with the movable button.

[0016] Optionally, a through hole is formed in the bottom of the lower cover body of the first end cover, and the rotating shaft of the driving motor penetrates through the through hole into the first end cover and is connected with the driving wheel.

[0017] Optionally, the connecting arm comprises a connecting section and an extension section, the connecting arm is mounted on the bottom side of the sliding block through bolts and clamping plates, and a first mounting hole for mounting a curtain is formed in the extension section.

[0018] Optionally, the connecting part of the first trolley extends to the outside of the second straight section, and the connecting part of the second trolley extends to the outside of the first straight section.

[0019] Optionally, universal alloy wheels and a plurality of nano silent wheels are slidably connected to one side of the track shell on which the first trolley and the second trolley are arranged, and limiting plates are fixedly connected to both ends of the track shell, and a first mounting plate for mounting a curtain is connected to the limiting plates.

[0020] Optionally, a plurality of second installation plates are clamped in the upper long groove, the second installation plates are provided with second installation holes, the track shell top is provided with installation rods in the same number as the second installation plates, the installation rod bottom is provided with installation grooves corresponding to the track shell, and the installation rod is provided with third installation holes communicating with the installation grooves, and the track shell is installed at the installation rod bottom by means of screws penetrating the third installation holes, the installation grooves and the second installation holes in sequence.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] (1) the utility model discloses a drive motor drives the rotation of the driving wheel, and under the auxiliary action of the driven wheel, the belt moves back and forth in the track shell, wherein the first straight section of the belt drives the first trolley to move back and forth, the second straight section drives the second trolley to move back and forth, and the moving direction of the first trolley and the second trolley is opposite, so that the second trolley drives the left curtain to move left or right under the indirect drive of the drive motor, the first trolley drives the right curtain to move right or left, thereby realizing the opening and closing of the curtain at the same speed and the same stroke, and the length of the trolley is lengthened, wherein the connecting arm pulls the two sliding blocks to move, and the two sliding blocks are movably connected through the connecting rod, so that when the curtain is opened, part of the curtain on the connecting plate is blocked by the remaining curtain, and the sliding block connected with the connecting arm is also blocked and tilted, which drives it to not normally slide in the sliding channel, and the other sliding block can still pull the trolley to slide linearly in the sliding channel, so that the whole trolley can move smoothly and quickly in a straight line, and the whole curtain moves stably.

[0023] (2) the track shell of the utility model is a cylindrical aluminum pipe, light in quality, and the track can be connected by the clamped connecting blocks in the upper long groove to connect multiple track shells to realize the length adjustment of the track shell, and the stable connection between the track shells can be realized by installing an installation rod on one track shell to support, and the first end cover can be opened by pressing the movable button and making the spring pop up the upper cover body of the first end cover, so that the maintenance of the driving wheel in the first end cover is realized, and the device only contains electronic components of the drive motor, simple in structure and easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a perspective view of the utility model embodiment.

[0026] Figure 2 The exploded view of the utility model embodiment.

[0027] Figure 3 The track shell section view of the utility model embodiment.

[0028] Figure 4 The exploded view of the trolley structure of the utility model embodiment.

[0029] Figure 5 The upper cover body and lower cover body structure schematic diagram of the first end cover of the utility model embodiment.

[0030] Figure 6 The upper cover body and lower cover body structure schematic diagram of the second end cover of the utility model embodiment.

[0031] In the drawing: track 1, track shell 101, connecting plate 102, bottom plate 103, stop plate 104, transmission structure 2, driving wheel 201, driven wheel 202, belt 203, first straight line segment 2031, second straight line segment 2032, curved segment 2033, drive motor 204, trolley structure 3, sliding block 301, sliding groove 3011, connecting rod 302, mounting block 303, mounting cavity 3031, connecting arm 304, connecting segment 3041, extension segment 3042, first mounting hole 3043, bolt 305, clamping plate 306, first end cover 4, second end cover 5, drive housing 6, upper long groove 7, lower long groove 8, connecting block 9, mounting rod 10, pulley sliding cavity 11, belt conveying cavity 12, sliding channel 13, first trolley 14, second trolley 15, upper cover body 16, lower cover body 17, upper groove body 18, lower groove body 19, decorative head 20, spring 21, movable button 22, universal alloy wheel 23, nanometer mute wheel 24, limit plate 25, first mounting plate 26, second mounting plate 27. DETAILED DESCRIPTION

[0032] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the embodiments of the utility model, and cannot be understood as the limitation of the utility model.

[0033] In the description of the utility model embodiments, it is understood that if the utility model embodiments involve directional indications, such as up, down, left, right, front, back, in, out and the like, the orientation or position relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model embodiments and simplifying the description, and therefore cannot be understood as the limitation of the utility model.

[0034] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated. Thus, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise specifically defined.

[0035] In the embodiments of the present application, unless otherwise specifically defined and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated. It can be mechanically connected, or it can be electrically connected. It can be directly connected, or it can be indirectly connected through an intermediate medium. It can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] For example, Figures 1-6The utility model discloses an electric track of round aluminum pipe provides a kind of electric track of round aluminum pipe, including track 1, drive structure 2 being set on track 1 and trolley structure 3 being driven along track 1 reciprocating by drive structure 2, wherein track 1 both ends are connected with first end cover 4 and second end cover 5 respectively, and the lower side of first end cover 4 is connected with drive housing 6;Drive structure 2 includes driving wheel 201 being arranged in first end cover 4, driven wheel 202 being arranged in second end cover 5, belt 203 being tensioned between driving wheel 201 and driven wheel 202 and drive motor 204 driving driving wheel 201 rotation, and drive motor 204 is installed in drive housing 6 inside;Track 1 includes several track housings 101, and track housing 101 is cylindrical aluminum pipe, and connecting plate 102 and bottom plate 103 are horizontally arranged in track housing 101, two limit plates 104 are vertically connected to the bottom of connecting plate 102 and the top of bottom plate 103, and connecting plate 102, bottom plate 103 divide track housing 101 into upper long groove 7, inner cavity and lower long groove 8, connecting block 9 for connecting track housing 101 is clamped in upper long groove 7, a plurality of connecting holes are arranged on connecting block 9, limit plate 104 divides inner cavity into pulley sliding cavity 11 in the middle and belt conveying cavity 12 on both sides, sliding channel 13 is formed in bottom plate 103, and pulley sliding cavity 11 is communicated with lower long groove 8 through sliding channel 13;Belt 203 includes first linear segment 2031, second linear segment 2032 and curved segment 2033 connecting the both ends of first linear segment 2031 and second linear segment 2032, and the both ends of curved segment 2033 are respectively sleeved on driving wheel 201 and driven wheel 202;First end cover 4 and second end cover 5 are provided with groove for the sliding in and out of curved segment 2033;Trolley structure 3 includes first trolley 14 and second trolley 15, first trolley 14 is arranged on first linear segment 2031, and second trolley 15 is arranged on second linear segment 2032;First trolley 14 and second trolley 15 all include sliding part being slidably connected in track housing 101, mounting part being installed on belt 203 and being connected with sliding part and connecting part being connected outside track housing 101, sliding part includes two sliding blocks 301, two sliding blocks 301 are movably connected through connecting rod 302, sliding groove 3011 corresponding to bottom plate 103 is formed on the both sides of sliding block 301, mounting part includes two mounting blocks 303, two mounting blocks 303 are connected one by one with two sliding blocks 301, and mounting cavity 3031 corresponding to belt 203 is formed in mounting block 303, and connecting arm 304 is screw-connected with the side surface of sliding block 301.

[0037] Specifically, the length of the trolley is lengthened by the trolley structure 3 comprising two sliding blocks 301 connected by a connecting rod 302, two mounting blocks 303 corresponding to the sliding blocks 301 and a connecting arm 304 mounted on one of the sliding blocks 301, so that when the curtain is opened, the upper part of the curtain on the connecting plate 102 is blocked by the side curtain, the sliding block 301 connected with the connecting block 9 is also blocked and deviated, and cannot slide linearly on the sliding channel 13, while the other sliding block 301 still pulls the trolley to slide linearly on the sliding channel 13, so that the movement of the whole trolley deviates from the original movement track, the whole trolley can move smoothly and quickly in a straight line, and the whole curtain moves stably.

[0038] In the embodiment, as shown in the figure, Figure 2 The first end cover 4 and the second end cover 5 each comprise an upper cover body 16 and a lower cover body 17, the upper cover body 16 is sleeved on the end of the track shell 101, and an upper groove body 18 is arranged in the upper cover body 16, the lower cover body 17 is connected to the bottom of the upper cover body 16 by screws, and a lower groove body 19 is arranged in the lower cover body 17, the groove body is formed by the lower groove body 19 and the upper groove body 18.

[0039] Specifically, the groove body is divided into the upper groove body 18 and the lower groove body 19, so as to facilitate replacement of the whole belt 203 after the end cover is opened.

[0040] In the embodiment, as shown in the figure, Figure 1 The first end cover 4 and the second end cover 5 each comprise an upper cover body 16 and a lower cover body 17, the upper cover body 16 is sleeved on the end of the track shell 101, and an upper groove body 18 is arranged in the upper cover body 16, the lower cover body 17 is connected to the bottom of the upper cover body 16 by screws, and a lower groove body 19 is arranged in the lower cover body 17, the groove body is formed by the lower groove body 19 and the upper groove body 18.

[0041] In the embodiment, as shown in the figure, Figure 2 The first end cover 4 further comprises a spring 21 mounted between the upper cover body 16 and the lower cover body 17 and a movable button 22 movably connected to the lower cover body 17, and the bottom of the spring 21 is connected to the movable button 22.

[0042] Specifically, the first end cover 4 is opened by pressing the movable button 22 and making the spring 21 pop up the upper cover body 16 of the first end cover 4, so that the maintenance of the driving wheel 201 in the first end cover 4 is realized.

[0043] In the embodiment, as shown in the figure, Figure 2 A through hole (not marked in the figure) is formed in the bottom of the lower cover body 17 of the first end cover 4, and the rotating shaft of the driving motor 204 penetrates through the through hole into the first end cover 4 and is connected with the driving wheel 201.

[0044] Specifically, the through hole is arranged to avoid sundries from entering the driving shell and better protect the driving motor 204.

[0045] In the embodiment, as shown in the figure, Figure 4As shown, the connecting arm 304 comprises a connecting section 3041 and an extending section 3042, the connecting section 3041 is installed on the bottom side of the sliding block 301 through the bolt 305 and the clamping plate 306, and the extending section 3042 is provided with a first mounting hole 3043 for mounting the curtain.

[0046] In the embodiment, as shown in Figure 3 and Figure 4 As shown, the connecting part of the first pulley 14 extends to the outside of the second straight section 2032, and the connecting part of the second pulley 15 extends to the outside of the first straight section 2031, so that the sliding edges of the left and right curtains can be better folded forward and backward to block the sunlight.

[0047] In the embodiment, as shown in Figure 1 and Figure 2 As shown, the track 1 is slidably connected with a universal alloy wheel 23 and a plurality of nano silent wheels 24 on one side of the first pulley 14 and the second pulley 15, and the track 1 is fixedly connected with a limiting plate 25 at both ends, and the limiting plate 25 is connected with a first mounting plate 26 for mounting the curtain below.

[0048] Specifically, the universal alloy wheel 23 can make the edges of the curtain move in multiple directions; the nano silent wheel 24 can reduce the noise when the curtain pulley moves in the track 1; the limiting plate 25 blocks the movement of the pulley on the track 1; and the first mounting plate 26 is used to fix the edge of the curtain on the side that is stationary.

[0049] In the embodiment, as shown in Figure 2 As shown, the second mounting plate 27 is also clamped in the upper long groove 7, the second mounting plate 27 is provided with a second mounting hole (not labeled in the figure), the track housing 101 is provided with a mounting rod 10 at the top, the mounting rod 10 is provided with a mounting slot (not labeled in the figure) corresponding to the track housing 101 at the bottom, and the mounting rod 10 is provided with a third mounting hole (not labeled in the figure) communicating with the mounting slot, and the track housing 101 is installed at the bottom of the mounting rod 10 by being threaded through the third mounting hole, the mounting slot and the second mounting hole in sequence.

[0050] Before use, the operator first installs the installation rod 10 on the top of the track shell 101, and then installs the installation rod 10 on the wall above the window, so that the electric track is installed above the window; when in use, the operator energizes the driving motor 204, starts the driving motor 204, and the driving motor 204 drives the driving wheel 201 to rotate, and under the auxiliary action of the driven wheel 202, the belt 203 moves back and forth in the track 1, wherein the first straight section 2031 of the belt 203 drives the first trolley 14 to move back and forth, the second straight section 2032 drives the second trolley 15 to move back and forth, and the moving direction of the first trolley 14 and the second trolley 15 is opposite, when the second trolley 15 drives the left curtain to move left under the indirect driving of the driving motor 204, the first trolley 14 drives the right curtain to move right, realizing the opening of the curtain, when the second trolley 15 drives the left curtain to move right under the indirect driving of the driving motor 204, the first trolley 14 drives the right curtain to move left, realizing the closing of the curtain.

[0051] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circular aluminium tube electric track (1), characterized in that, The utility model relates to a track type automatic feeding device, including track (1), drive structure (2) being set on track (1) and trolley structure (3) being driven along track (1) reciprocating movement by drive structure (2), wherein: The track (1) is connected with the first end cover (4) and the second end cover (5) respectively at both ends, the first end cover (4) is connected with the drive shell (6) on the downside; The drive structure (2) includes the driving wheel (201) being set in the first end cover (4), the driven wheel (202) being set in the second end cover (5), the belt (203) being taut between the driving wheel (201) and the driven wheel (202) and the drive motor (204) driving the driving wheel (201) rotation, the drive motor (204) is installed in the drive shell (6) inside; The track (1) includes a plurality of track housings (101), the track housing (101) is cylindrical aluminum pipe, the connecting plate (102) and the bottom plate (103) are horizontally arranged in the track housing (101), the connecting plate (102) bottom and the bottom plate (103) top are vertically connected with two stop plates (104), the connecting plate (102), the bottom plate (103) divide the track housing (101) into the upper long groove (7), the inner cavity and the lower long groove (8), the connecting block (9) for connecting the track housing (101) is clamped in the upper long groove (7), a plurality of connecting holes are formed in the connecting block (9), the stop plate (104) divides the inner cavity into the pulley sliding cavity (11) in the middle and the belt conveying cavity (12) on both sides, the bottom plate (103) is provided with a sliding channel (13), and the pulley sliding cavity (11) is communicated with the lower long groove (8) through the sliding channel (13); The belt (203) includes first linear segment (2031), second linear segment (2032) and curved segment (2033) connecting both ends of first linear segment (2031) and second linear segment (2032) located in front and back, both ends of curved segment (2033) are respectively sleeved on the driving wheel (201) and the driven wheel (202); The first end cover (4) and the second end cover (5) are provided with groove bodies for the sliding in and out of the curved segment (2033); The trolley structure (3) includes the first trolley (14) and the second trolley (15), the first trolley (14) is arranged on the first linear segment (2031), and the second trolley (15) is arranged on the second linear segment (2032); The first pulley (14) and the second pulley (15) each comprise a sliding part slidably connected in the track shell (101), a mounting part mounted on the belt (203) and connected with the sliding part, and a connecting part extending out of the track shell (101), the sliding part comprises two sliding blocks (301), the two sliding blocks (301) are movably connected through a connecting rod (302), sliding grooves (3011) corresponding to the bottom plate (103) are formed on the two sides of the sliding block (301), the mounting part comprises two mounting blocks (303), the two mounting blocks (303) are connected with the two sliding blocks (301) one by one, and a mounting cavity (3031) corresponding to the belt (203) is formed in the mounting block (303), and the connecting part comprises a connecting arm (304), the connecting arm (304) is screw-connected with the side surface of the sliding block (301).

2. A circular aluminum tube electric rail according to claim 1, characterized in that, The first end cover (4) and the second end cover (5) each comprise an upper cover body (16) and a lower cover body (17), the upper cover body (16) is sleeved on the end of the track shell (101), and an upper groove body (18) is arranged in the upper cover body (16), the lower cover body (17) is screw-connected to the bottom of the upper cover body (16), and a lower groove body (19) is arranged in the lower cover body (17), and the lower groove body (19) and the upper groove body (18) form the groove body.

3. A circular aluminum tube electric rail according to claim 1, wherein The first end cover (4) and the second end cover (5) are connected with decorative heads (20) away from the track shell (101).

4. The electric track of round aluminum tube according to claim 1, characterized in that, The first end cover (4) further comprises a spring (21) mounted between the upper cover body (16) and the lower cover body (17), and a movable button (22) movably connected to the lower cover body (17), and the bottom of the spring (21) is connected with the movable button (22).

5. A circular aluminium tube motorized track according to claim 4, characterized in that, A through hole is formed in the bottom of the lower cover body (17) of the first end cover (4), and the rotating shaft of the driving motor (204) penetrates through the through hole into the first end cover (4) and is connected with the driving wheel (201).

6. A circular aluminum tube electric rail according to claim 1, wherein The connecting arm (304) comprises a connecting segment (3041) and an extension segment (3042), the connecting arm (304) is mounted on the bottom side of the sliding block (301) through a bolt (305) and a clamping plate (306), and a first mounting hole (3043) for mounting a curtain is formed in the extension segment (3042).

7. A circular aluminum tube electric rail according to claim 1, wherein The connecting part of the first pulley (14) extends to the outside of the second straight line segment (2032), and the connecting part of the second pulley (15) extends to the outside of the first straight line segment (2031).

8. The electric track of round aluminum tube according to claim 1, characterized in that, The track shell (101) is slidably connected with a universal alloy wheel (23) and a plurality of nano silent wheels (24) on one side of the first pulley (14) and the second pulley (15), and the track shell (101) is fixedly connected with a limiting plate (25) at both ends, and the limiting plate (25) is connected with a first mounting plate (26) for mounting a curtain.

9. The electric track of round aluminum tube according to claim 1, characterized in that, The upper long slot (7) is also clamped with several second installation plates (27), the second installation plate (27) is provided with a second installation hole, the track shell (101) top is provided with the same number of installation rods (10) as the second installation plate (27), the installation rod (10) bottom is provided with a corresponding installation slot with the track shell (101), and the installation rod (10) is provided with a third installation hole communicated with the installation slot, and the track shell (101) is installed at the bottom of the installation rod (10) by screwing through the third installation hole, the installation slot and the second installation hole.

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