Waterproof device for ground street lamp and energy-saving street lamp

Abstract

The invention discloses a ground street lamp waterproof device and an energy-saving street lamp, and particularly relates to energy-saving lamp equipment, the ground street lamp waterproof device comprises a separated lamp holder, the separated lamp holder comprises a top cover and a bottom cover which are used for hooping an LED plate, and a conical cover is arranged on the bottom cover; the rubber ring waterproof assembly comprises a first rubber ring arranged between the top cover and the bottom cover and a second rubber ring arranged between the top cover and the conical cover; wherein the locking nail penetrates through the top cover and the bottom cover and limits the top cover and the bottom cover from loosening. The top cover and the bottom cover are pulled and fixed through the locking nails, so that the top cover and the bottom cover are attached to each other, the first rubber ring and the second rubber ring are extruded to achieve sealing and waterproofing, when the first rubber ring and the second rubber ring contract due to aging, the locking nails and the top cover are pushed to be close to the bottom cover, the distance between the top cover and the bottom cover is shortened, and the sealing effect is improved. And the contraction gap of the first rubber ring and the second rubber ring is filled for sealing and waterproofing.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving lamps, and in particular to a waterproof device for a ground street lamp and an energy-saving street lamp. Background Art

[0002] Ground lamps are lighting equipment installed on the road surface and the ground to provide lighting for pedestrians to move around. Ground lamps are also installed in large open-air places such as squares and parks to reduce the number of pole-shaped street lamps and increase the beauty of the landscape.

[0003] The waterproof device of the floor lamp prevents water and dust from entering the lamp, slows down the rusting of the floor lamp, and protects the internal LED lamp beads and circuit boards.

[0004] According to patent number CN106524097A, published (announced) date: 2017-03-22, a ground street lamp waterproof device is disclosed, including a waterproof body and a water-proof box, wherein the waterproof body includes a waterproof plate and a folding plate; the water-proof box is provided with a through hole inside, a sliding rod sleeve is provided on one side of the water-proof box, a sliding rod is provided inside the sliding rod sleeve, a side plate is provided on the side of the water-proof box provided with the sliding rod sleeve, the upper end of the side plate is connected to the sliding rod, a water dividing groove is provided on the surface of the water-proof box, and a drainage groove is provided outside the water dividing groove; one side of the water-proof box is connected to the waterproof plate, the waterproof plate has an angle with the horizontal plane, and the folding plate is arranged on the side of the waterproof plate parallel to the side plate; the tail end of the sliding rod is provided with a mounting groove, and the top end of the side plate is provided with a hook corresponding to the mounting groove at the tail end of the sliding rod. The present invention has the dual effects of waterproofing and water-proofing, and is simple in design and operation, easy to disassemble, and can be applied to any lamp holder.

[0005] In the prior art including the above-mentioned patent, the waterproof device of the floor lamp mostly uses a rubber ring in combination with stainless steel metal to achieve the purpose of waterproofing, dustproofing and slowing down rust. However, the rubber ring is prone to aging when the LED lamp beads are lit and the temperature rises. After aging, the rubber ring shrinks, resulting in a significant reduction in the original waterproof and dustproof effect, making it easy for dust and water to enter the lamp and threaten the circuit board. Summary of the invention

[0006] The purpose of the present invention is to provide a ground street lamp waterproof device and an energy-saving street lamp, aiming to solve the above-mentioned problems.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a ground street lamp waterproof device, comprising: A separate lamp holder, comprising a top cover and a bottom cover for holding an LED board, wherein a cone cover is arranged on the bottom cover; A rubber ring waterproof assembly, comprising a first rubber ring disposed between the top cover and the bottom cover, and a second rubber ring disposed between the top cover and the cone cover; The utility model also includes a locking pin which penetrates the top cover and the bottom cover and restricts the two from loosening.

[0008] Preferably, elastic sheets bent toward the top cover are arranged in a linear array on the locking pins, and the elastic sheets are turned over to fit the bottom cover and fixed.

[0009] Preferably, a deformation cavity is provided on the first rubber ring and the second rubber ring.

[0010] An energy-saving street lamp, using the above-mentioned ground street lamp waterproof device, includes a separate lamp head and an embedded base arranged on the ground for supporting the separate lamp head, an elastic dustproof ring is arranged between the two to form a channel between the separate lamp head and the embedded base, and the channel is connected to the drain outlet.

[0011] Preferably, a plurality of groups of extension plates are arranged in a circular array on the separate lamp cap, a plurality of groups of air ducts facing the extension plates are arranged at the bottom of the separate lamp cap, and the other ends of the air ducts face the drain port.

[0012] Preferably, a plurality of floating plates are movably arranged in a circular array at the bottom of the separated lamp holder, and the plurality of floating plates shield the drain outlet. The floating plates flip and float upward as the liquid level rises to open the drain outlet.

[0013] Preferably, a support rod is provided at the bottom of the separated lamp holder, a movable groove is opened on the floating plate, and two side walls of the movable groove are respectively floated or sunk by the floating plate to fit the support rod.

[0014] Preferably, the separate lamp holder is driven to push against the embedded base to drive the extension piece to fit the inner wall of the embedded base.

[0015] Preferably, the separate lamp holder and the embedded base are close to each other to squeeze the elastic dust ring to bend.

[0016] Preferably, a bevel ring is arranged on the separate lamp cap, and a flip elastic ring is movably arranged on the embedded base, and the flip elastic ring is bent along with the elastic dustproof ring to fit the bevel ring.

[0017] In the above technical scheme, a ground street lamp waterproof device and an energy-saving street lamp provided by the present invention have the following beneficial effects: the top cover and the bottom cover are pulled and fixed by locking nails, so that the top cover and the bottom cover are fitted together, thereby squeezing the first rubber ring and the second rubber ring to achieve sealing and waterproofing, and when the first rubber ring and the second rubber ring shrink due to aging, the locking nails and the top cover are pushed closer to the bottom cover to shorten the distance between the top cover and the bottom cover, fill the gap caused by the shrinkage of the first rubber ring and the second rubber ring, and perform sealing and waterproofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 An overall schematic diagram provided for an embodiment of the present invention; Figure 2 A schematic diagram of a separate lamp holder and an embedded base provided in an embodiment of the present invention; Figure 3 A schematic diagram of a separate lamp holder provided in an embodiment of the present invention; Figure 4 A schematic diagram of an explosion of a separated lamp holder provided in an embodiment of the present invention; Figure 5 A schematic cross-sectional view of a split lamp holder provided by an embodiment of the present invention; Figure 6 An overall cross-sectional schematic diagram provided for an embodiment of the present invention; Figure 7 for Figure 6 The enlarged schematic diagram at A in the middle; Figure 8 A schematic diagram of an explosion of a separated lamp cap and a floating block provided in an embodiment of the present invention; Fig. 9 An exploded schematic diagram of an embedded base provided in an embodiment of the present invention; Fig.10 for Fig. 9 Enlarged schematic diagram of point B in the middle.

[0020] Description of reference numerals: 1. Separate lamp holder; 10. Top cover; 101. Slot; 102. Locking nail; 1021. Elastic sheet; 103. Buckle ring; 104. Glass sheet; 11. Bottom cover; 110. Bevel ring; 111. Cone cover; 112. Support rod; 113. Connecting plate; 114. Support ring; 12. LED board; 121. Cable; 13. Elastic dustproof ring; 2. Rubber ring waterproof assembly; 21. First rubber ring; 211. Deformation cavity; 22. Second rubber ring; 3. Embedded base; 30. Downpipe; 31. Flip spring ring; 311. Turn buckle; 32. Support ring; 321. Ring groove; 41. Floating plate; 411. Movable groove; 412. Through groove; 413. Counterweight; 42. Extension piece; 43. Air duct. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. Example

[0022] like Figure 1-10 As shown, a ground street lamp waterproof device comprises: A separate lamp holder 1 includes a top cover 10 and a bottom cover 11 that hold an LED board 12, and a cone cover 111 is provided on the bottom cover 11; The rubber ring waterproof assembly 2 includes a first rubber ring 21 disposed between the top cover 10 and the bottom cover 11, and a second rubber ring 22 disposed between the top cover 10 and the cone cover 111; The locking pin 102 is also provided to penetrate the top cover 10 and the bottom cover 11 and prevent the two from loosening. Specifically, the bottom cover 11 and the cone cover 111 are connected by a connecting plate 113, and a groove 101 corresponding to the connecting plate 113 is opened on the top cover 10. After the LED board 12 is placed in the bottom cover 11, it is installed on the bottom cover 11 through the top cover 10 for fixation. The first rubber ring 21 is set between the annular frames of the top cover 10 and the bottom cover 11, and the top cover 10 and the bottom cover 11 are pulled and fixed by the locking pins 102 that pass through the top cover 10 and the bottom cover 11 to achieve the sealing of the first rubber ring 21, and a supporting ring 114 is set on the cone cover 111, and the second rubber ring 22 is set on the supporting ring 114. When the locking pin 102 pulls the top cover 10 and the bottom cover 11, the supporting ring 114 will also fit the top cover 10, so that the first rubber ring 21 and the second rubber ring 22 respectively seal the upper end and the lower end of the top cover 10 to complete the installation.

[0023] The double-layer sealing method can increase the volume of the bottom cover 11 for carrying the LED board 12, thereby increasing the heat dissipation capacity.

[0024] Furthermore, a cable 121 is provided on the LED board 12 , and the cable 121 passes through the cone cover 111 , and a waterproof member (the waterproof member may be a waterproof joint) is provided therebetween.

[0025] Furthermore, the top cover 10 and the bottom cover 11 are fixed with assistance by an elastic buckle ring 103, and a glass sheet 104 is provided on the top cover 10 for transmitting light and softening the light.

[0026] In the above technical solution, the top cover 10 and the bottom cover 11 are pulled and fixed by the locking pins 102, so that the top cover 10 and the bottom cover 11 are fitted together, thereby squeezing the first rubber ring 21 and the second rubber ring 22 to achieve sealing and waterproofing. When the first rubber ring 21 and the second rubber ring 22 shrink due to aging, the locking pins 102 and the top cover 10 are pushed to move closer to the bottom cover 11 to shorten the distance between the top cover 10 and the bottom cover 11, fill the gap caused by the shrinkage of the first rubber ring 21 and the second rubber ring 22, and achieve sealing and waterproofing.

[0027] As an embodiment provided by the present invention, elastic sheets 1021 bent toward the top cover 10 are arranged in a linear array on the locking pins 102 , and the elastic sheets 1021 are turned over and attached to the bottom cover 11 for fixing.

[0028] Specifically, the elastic sheet 1021 can be bent in one direction, such as Figure 7 As shown, the one-way bending is upward bending. During installation, the locking pins 102 are moved toward the holes opened on the top cover 10 and the bottom cover 11, driving the elastic sheet 1021 to bend in one direction and enter the holes. After the elastic sheet 1021 passes through the holes, it pops out to fit the bottom cover 11, completing the fixing of the top cover 10 and the bottom cover 11. When the first rubber ring 21 and the second rubber ring 22 are aged due to long-term use, the top cover 10 and the locking pins 102 are squeezed to shorten the distance between the top cover 10 and the bottom cover 11. At this time, the locking pins 102 continue to extend into the holes, so that another set of elastic sheets 1021 become the fitting part, shortening the distance between the top cover 10 and the bottom cover 11.

[0029] Furthermore, a deformation cavity 211 is provided on the first rubber ring 21 and the second rubber ring 22. The deformation cavity 211 is used to increase the deformation amplitude of the first rubber ring 21 and the second rubber ring 22 to adapt to the change in the distance between the top cover 10 and the bottom cover 11, and still has a certain deformation ability when the first rubber ring 21 and the second rubber ring 22 age and shrink, thereby extending the replacement time of the first rubber ring 21 and the second rubber ring 22. After the lamp is installed, the top cover 10 and the locking pin 102 can be pushed against by the flat plate to complete the tightening, and the process is convenient and quick. Example

[0030] like Figure 1-10 As shown, an energy-saving street lamp includes an embedded base 3 set on the ground for supporting a separate lamp holder 1, and an elastic dust ring 13 is set between the two to form a channel between the separate lamp holder 1 and the embedded base 3, and the channel is connected to the drain outlet.

[0031] Specifically, the embedded base 3 is installed on the ground, and the end of the embedded base 3 (with Figure 6For reference, the end is the lower end) is provided with a downpipe 30, which is connected to a drainage port pre-dug on the ground. An elastic dustproof ring 13 is provided on the separated lamp holder 1. When the separated lamp holder 1 is installed on the embedded base 3, the elastic dustproof ring 13 lifts the separated lamp holder 1, so that a channel is formed between the separated lamp holder 1 and the embedded base 3, and the channel can be used for heat dissipation and water drainage.

[0032] Floor lamps are installed underground. For waterproof and dustproof purposes, they are mostly embedded, with a gravel structure for infiltration drainage and water drainage. However, although the gravel structure can drain water, its heat dissipation capacity is weak and it requires a large floor space. When the floor lamp works for a long time, heat will still accumulate at the bottom. The gravel structure cannot specifically cool the heat at the bottom, resulting in a shortened service life of the floor lamp.

[0033] The embedded base 3 occupies a smaller area than the gravel structure and is more suitable for scenes lacking green vegetation, such as squares and terraces. When the LED board 12 in the separated lamp head 1 is powered on, heat is generated. The heat rises along the channel and passes through the elastic dust ring 13 for cooling. Compared with gravel, it can be cooled faster. When it rains, rainwater flows into the channel through the elastic dust ring 13 and is discharged from the sewer pipe 30 from the sewer outlet, and still has good drainage capacity.

[0034] As an embodiment provided by the present invention, a plurality of extension plates 42 are arranged in a circular array on the separated lamp holder 1, and a plurality of air ducts 43 are arranged at the bottom of the separated lamp holder 1 toward the extension plates 42, and the other ends of the air ducts 43 are toward the drain port.

[0035] Specifically, the extension piece 42 is made of metal, and is a metal sheet, and the extension piece 42 is arranged on the bottom cover 11 of the separated lamp holder 1, so as to assist the conduction of heat. When the LED board 12 is powered on, the heat is dissipated along the extension piece 42 to enhance the heat dissipation effect. A plurality of air ducts 43 are arranged at the bottom of the separated lamp holder 1 toward the extension piece 42. When the airflow rises along the elastic dustproof ring 13, the air duct 43 will be driven to draw air toward the drain port along with the rising airflow. The temperature of the drain port is relatively low, and the airflow with a lower temperature is guided toward the extension piece 42 to assist the heat dissipation. When the rainfall is high and covers the elastic dustproof ring 13, the rainwater continuously enters the channel along the elastic dustproof ring 13. At this time, as the rainwater continuously flows, the air is drawn by the air duct 43 to avoid the generation of negative pressure in the channel and maintain the smooth discharge of rainwater.

[0036] As an embodiment provided by the present invention, a plurality of floating plates 41 are movably arranged in a circular array at the bottom of the separation lamp holder 1. The plurality of floating plates 41 shield the drain outlet. The floating plates 41 flip up and float as the liquid level rises to open the drain outlet.

[0037] Specifically, the floating plate 41 is located in the channel, and the bottom of the floating plate 41 (with Figure 8For reference, the lower end is the bottom) is provided with a counterweight block 413, which pulls and slides along the channel, and a plurality of sinking floats 41 block part of the drain outlet. At this time, the extension piece 42 is exposed in the channel, and the sinking float 41 will occupy part of the channel space to reduce heat flow stagnation and assist heat rise. When it rains, the float 41 partially blocks and restricts the drain outlet, and the amount of water discharged is limited, so that rainwater accumulates in the channel and floats on the liquid surface. After the float 41 flips over and floats up with the floating liquid surface, the blocked part of the drain outlet is opened, so that a large amount of water is discharged, generating inertia to assist the rapid discharge of water. After the discharge, the liquid level drops, and the float 41 moves and resets as the liquid level drops, waiting to be reused.

[0038] Furthermore, a support rod 112 is provided at the bottom of the separated lamp holder 1, and the support rod 112 corresponds to the floating plate 41 one by one. The floating plate 41 is provided with a movable groove 411, and the support rod 112 penetrates into the movable groove 411. The movable groove 411 is set through, and the width of the movable groove 411 is greater than the support rod 112. When the floating plate 41 sinks with the counterweight block 413, the support rod 112 will fit one side of the outer circle of the movable groove 411 (with Figure 6 For reference, the outer circle is the side away from the central axis, and the inner circle is the side close to the central axis). When the liquid level rises and drives the float plate 41 to float up, because the support rod 112 fits one side of the outer circle of the movable groove 411, the float block 41 will first flip over when floating up (the counterweight center of the counterweight block 413 is close to the central axis), so that the support rod 112 fits both sides of the movable groove 411 at the same time. After the flipping occurs, as the liquid level continues to rise, the support rod 112 fits one side of the inner circle of the movable groove 411 to reach the limit position.

[0039] Furthermore, the floating plate 41 is provided with a through groove 412 corresponding to the extension piece 42 one by one. When the floating plate 41 floats up, the extension piece 42 will be inserted into the through groove 412, and will not hinder the floating and sinking of the floating plate 41. The extension piece 42 extends out of the through groove 412 by a predetermined distance (the predetermined distance is 3 mm to 5 mm); Due to the humid environment, sticky liquid may occasionally be produced on the channel due to dust accumulation. At this time, a flat plate is used to press the separated lamp head 1 toward the embedded base 3 to drive the extension piece 42 to pass through the through groove 412 and fit the inner wall of the embedded base 3 (that is, the inner wall of the channel), and then the flat plate is slightly rotated to scrape the mucus for cleaning.

[0040] As the best embodiment provided by the present invention, the separated lamp holder 1 and the embedded base 3 are close to each other to squeeze the elastic dust ring 13 to bend; A bevel ring 110 is arranged on the separate lamp holder 1 , and a flip elastic ring 31 is movably arranged on the embedded base 3 . The flip elastic ring 31 is bent along with the elastic dustproof ring 13 to fit the bevel ring 110 .

[0041] Specifically, a support ring 32 is provided on the embedded base 3, and annular grooves 321 are provided on the support ring 32 in a circular array, and a turn buckle 311 is provided on the flip elastic ring 31. When installing the separated lamp holder 1, the turn buckle 311 is aligned with the annular groove 321 for snap-fit ​​installation. The width of the annular groove 321 is greater than the turn buckle 311, which can provide a small degree of freedom for rotation. The snap-fit ​​installation method is convenient for disassembly and installation. The elastic dust ring 13 has a folding groove in the middle section. When the separated lamp holder 1 is pressed by a flat plate (it can also be directly pressed by a pedal), the elastic dust ring 13 bends along the folding groove and pulls the flip elastic ring 31 to flip. At this time, the dirt accumulated on the elastic dust ring 13 is squeezed as the elastic dust ring 13 is folded, and the flipped flip elastic ring 31 will also fit the bevel ring 110 on the separated lamp holder 1, which assists in squeezing the accumulated dirt for subsequent cleaning.

[0042] When installing the separate lamp holder 1, align the turn buckle 311 with the ring groove 321 for snap-on installation. When the weather is not raining, the heat generated by the separate lamp holder 1 when it is powered on is dissipated along the extension piece 42 and rises along the channel. When the airflow rises along the elastic dust ring 13, it will drive the airflow of the air duct 4 to rise and draw air to the drain port, and guide the lower temperature airflow to the extension piece 42. At this time, the sinking float plate 41 will occupy part of the channel space to reduce heat flow stagnation and assist heat rise. When it rains, the float plate 41 partially blocks and restricts the drain port, the amount of water discharged is limited, causing rainwater to accumulate in the channel and float on the liquid surface. After the float plate 41 flips over and floats up with the floating liquid surface, the blocked part of the drain port is opened, thereby discharging a large amount of water and generating inertia to assist the rapid discharge of water. When the separate lamp holder 1 needs to be maintained, a flat plate is used to press The separated lamp holder 1 is pushed toward the embedded base 3, at which time the top cover 10 and the locking pin 102 are squeezed to shorten the distance between the top cover 10 and the bottom cover 11. At this time, the locking pin 102 continues to extend into the hole, so that another set of elastic sheets 1021 becomes a fitting part, shortening the distance between the top cover 10 and the bottom cover 11, and maintaining the waterproof performance. At the same time, the elastic dust ring 13 is bent along the folding groove and pulls the flip elastic ring 31 to flip. At this time, the dirt accumulated on the elastic dust ring 13 is squeezed as the elastic dust ring 13 is folded, and the flipped flip elastic ring 31 will also fit the bevel ring 110 on the separated lamp holder 1 to assist in squeezing the accumulated dirt. After squeezing, the compressed dirt is manually removed. While the flat plate is pressing the separated lamp holder 1, the flat plate can also be slightly rotated, and the extension sheet 42 passes through the through groove 412 and fits the inner wall of the embedded base 3 to scratch and clean it.

[0043] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waterproof device for a ground street lamp, characterized in that: include: A separate lamp holder (1) comprises a top cover (10) and a bottom cover (11) for holding an LED board (12), wherein a cone cover (111) is provided on the bottom cover (11); A rubber ring waterproof assembly (2), comprising a first rubber ring (21) arranged between the top cover (10) and the bottom cover (11), and a second rubber ring (22) between the top cover (10) and the cone cover (111); It also includes a locking pin (102) that penetrates the top cover (10) and the bottom cover (11) and limits the loosening of the two.

2. A waterproof device for ground street lamps according to claim 1, characterized in that: The locking pins (102) are provided with elastic sheets (1021) bent toward the top cover (10) in a linear array, and the elastic sheets (1021) are turned over to fit the bottom cover (11) and fixed.

3. A waterproof device for a ground street lamp according to claim 1, characterized in that: The first rubber ring (21) and the second rubber ring (22) are both provided with a deformation cavity (211).

4. An energy-saving street lamp, characterized in that: The ground street lamp waterproof device used in claims 1 to 3 comprises a separate lamp holder (1), and also comprises an embedded base (3) arranged on the ground for supporting the separate lamp holder (1), an elastic dustproof ring (13) is arranged between the two, so that a channel is formed between the separate lamp holder (1) and the embedded base (3), and the channel is connected to a drain outlet.

5. The energy-saving street lamp according to claim 4, characterized in that: The split lamp holder (1) is provided with a plurality of groups of extension pieces (42) in a circular array, and the bottom of the split lamp holder (1) is provided with a plurality of groups of air ducts (43) facing the extension pieces (42), and the other ends of the air ducts (43) face the drainage port.

6. The energy-saving street lamp according to claim 4, characterized in that: The bottom of the split lamp holder (1) is movably provided with a plurality of floating plates (41) in a circular array, the plurality of floating plates (41) shielding the drainage port, and the floating plates (41) flip and float upward as the liquid level rises to open the drainage port.

7. The energy-saving street lamp according to claim 6, characterized in that: A support rod (112) is provided at the bottom of the split lamp holder (1), a movable groove (411) is provided on the floating plate (41), and two side walls of the movable groove (411) float up or sink through the floating plate (41) to fit the support rod (112).

8. The energy-saving street lamp according to claim 5, characterized in that: The separate lamp holder (1) is driven to push against the embedded base (3) so as to drive the extension piece (42) to fit the inner wall of the embedded base (3).

9. The energy-saving street lamp according to claim 4, characterized in that: The separated lamp holder (1) and the embedded base (3) are brought closer to each other so as to squeeze the elastic dustproof ring (13) to bend.

10. The energy-saving street lamp according to claim 9, characterized in that: The separate lamp holder (1) is provided with a bevel ring (110), and the embedded base (3) is movably provided with a flip elastic ring (31), the flip elastic ring (31) being bent along with the elastic dustproof ring (13) to fit the bevel ring (110).

Images