Protective cover for shoulder of pressure vessel

Abstract

The present invention relates to a protective cover for a shoulder of a pressure vessel, and more particularly, to a protective cover coupled to a shoulder of a pressure vessel to protect the shoulder from friction or impact.

Description

Technical Field

[0001] The present invention relates to a protective cover for a shoulder of a pressure vessel, and more particularly, to a protective cover coupled to the shoulder of the pressure vessel to protect the shoulder from friction or impact. Background Art

[0002] Pressure vessels are used to store a variety of fluids, such as oxygen, natural gas, and nitrogen, and more recently, hydrogen, the fuel for environmentally friendly hydrogen fuel cell vehicles.

[0003] A conventional plastic liner formed of a plastic material has a cylindrical shape with a hollow interior and includes a dome-shaped shoulder having a curved cross-section on one or both sides.

[0004] The shoulder is easily affected by the internal pressure of the container or external impact.

[0005] Patent Literature Patent Document 1: Korean Patent No. 10-2250341 Patent Document 2: Korean Patent No. 10-1856323 Summary of the invention Therefore, the present invention is made to solve the above problems in the prior art, and an object of the present invention is to provide a cover for reinforcing the shoulder of a pressure vessel.

[0006] In order to achieve the above-mentioned purpose, according to the present invention, there is provided a protective cover for the shoulder of a pressure vessel, which is coupled to a dome-shaped shoulder located on one side or both sides of the pressure vessel to protect the shoulder, and the protective cover comprises: an impact-resistant member made of impact-absorbing foam; an outer shell coupled to the impact-resistant member while surrounding the impact-resistant member; and a detachable device for detachably coupling the impact-resistant member and the outer shell to each other.

[0007] Furthermore, the detachable device includes: a fixing portion provided on one of the anti-impact member and the housing; and an insertion portion provided on the other of the anti-impact member and the housing.

[0008] In addition, the detachable device includes: a retaining portion having a fixing groove and a push rod, wherein the fixing groove is formed at a position spaced apart from the edge of the shell toward the center, and the push rod is rotatably mounted on the shell to elastically press the outer surface of the anti-impact member or return to an original position; and a mating portion protruding outward from the outer surface of the anti-impact member and including a coupling protrusion arranged on the fixing groove.

[0009] The cover for reinforcing the shoulder of a pressure vessel according to the present invention can reinforce the shoulder of the pressure vessel, thereby preventing the shoulder from being damaged due to external impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other objects, features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings, in which: Figures 1 to 5 A protective cover for a shoulder of a pressure vessel according to a first embodiment of the present invention is shown.

[0011] Figures 6 to 10 A protective cover for a shoulder of a pressure vessel according to a second embodiment of the present invention is shown.

[0012] Figures 11 to 15 A protective cover for a shoulder of a pressure vessel according to a third embodiment of the present invention is shown. DETAILED DESCRIPTION

[0013] Hereinafter, preferred embodiments of a protective cover for a shoulder of a pressure vessel according to the present invention will be described in detail with reference to the accompanying drawings.

[0014] First, if Figures 1 to 5 As shown, a protective cover 1 for a shoulder of a pressure vessel according to a first embodiment of the present invention is coupled to a dome-shaped shoulder located on one side or both sides of the pressure vessel to protect the shoulder, and the protective cover 1 includes: an anti-impact member 10, which is made of impact-absorbing foam; an outer shell 20, which is coupled to the anti-impact member 10 while surrounding the anti-impact member 10; and a detachable device 30, which is used to detachably couple the anti-impact member 10 and the outer shell 20 to each other.

[0015] The protective cover 1 according to the first embodiment is coupled to the shoulder of the plastic liner made of synthetic resin material, and in this case, is configured to be detachably coupled to a fixing flange 40 described later, thereby allowing replacement of only the protective cover 1 in the event of wear or damage. The detailed structure will be described later.

[0016] The anti-impact member 10 compensates for vibration and impact transmitted from the outside to protect the shoulder, and may be manufactured, for example, by foaming and molding a non-flammable rigid polyurethane material in a mold.

[0017] The anti-impact member 10 is arranged to cover a part of the shoulder to protect the shoulder which is susceptible to external impact and pressure, and is formed in a dome shape similar to the entire shoulder.

[0018] In addition, a through hole 11 is provided at the center of the impact-resistant member 10 to provide a passage for exposing a nozzle of the pressure vessel to the outside.

[0019] In addition, the anti-impact member 10 may be attached to the surface of the shoulder portion by an adhesive for fixing. A separate adhesive may be used, or a resin impregnated when the carbon fiber or glass fiber is wound on the liner may be used.

[0020] Of course, the anti-impact member 10 may be detachably coupled to the housing 20 described later, and then, the housing 20 is detachably coupled to the fixing flange 40 such that one side of the anti-impact member covers the shoulder.

[0021] The housing 20 is formed to protect the shoulder and the anti-impact member 10 and is formed in a dome shape similar to the shoulder. The housing 20 has a through hole 21 formed at the center to prevent interference with the nozzle, and it is desirable that the inner surface of the through hole 21 is in close contact with the nozzle.

[0022] The shell 20 is arranged to surround the shoulder when the anti-impact member 10 is combined with the shell 20, and partially offset the external impact or vibration before it is transmitted to the anti-impact member 10, and prevent foreign objects placed outside or transmitted from the outside, thereby preventing damage to the anti-impact member 10.

[0023] Meanwhile, the housing 20 may be coupled to the anti-impact member 10 fixed to the shoulder, or may be coupled to the shoulder after first being coupled to the anti-impact member 10. In this case, the housing 20 may be detachably coupled to the fixing flange 40 by fixing bolts, nuts, and washers, thereby enabling replacement of the housing 20 and the anti-impact member 10 in the event of breakage or damage during use.

[0024] Here, the present invention can minimize the time required to replace the housing 20 and the anti-impact member 10, and as described above, the housing 20 and the anti-impact member 10 can be combined and disassembled by fixing bolts, nuts and washers, thereby improving the convenience of combination.

[0025] Furthermore, there is no need to disassemble and reassemble the liner, shoulder or nozzle during replacement of the shell 20 and the impact-resistant member 10, so the assembly portion between the liner and the shoulder and the joining portion of the nozzle can maintain sealing, thereby ensuring stability.

[0026] The detachable device 30 is configured to detachably combine the anti-impact member 10 and the housing 20 with each other, so that the anti-impact member 10 or the housing 20 can be easily replaced in case of damage during use, thereby improving the convenience of replacement.

[0027] The detachable device 30 is configured to detachably combine the anti-impact member 10 and the housing 20 with each other, and therefore various devices can be applied as the detachable device 30 as long as the anti-impact member 10 and the housing 20 can be detachably combined. However, if a device that penetrates an object, such as a bolt and a nut, is used, there is a problem of reducing the durability of the anti-impact member 10 and the housing 20, and if an adhesive or the like is used, there is a problem of increasing post-processing time or being unable to use because the separated part is not clean.

[0028] Therefore, in the present invention, it is desirable that the detachable device 30 can enhance the convenience of bonding and detachment and does not require post-processing such as cleaning when the contact portion is separated.

[0029] To this end, the detachable device 30 in the present invention includes a fixing portion 31 provided on one of the anti-impact member 10 and the housing 20 , and an insertion portion 32 provided on the other of the anti-impact member 10 and the housing 20 .

[0030] Here, the fixing portion 31 and the insertion portion 32 are each provided on the anti-impact member 10 or the housing 20 , and are formed on different members from each other.

[0031] That is, when the fixing portion 31 is formed on the anti-impact member 10 , the inserting portion 32 is formed on the housing 20 , and conversely, when the inserting portion 32 is formed on the anti-impact member 10 , the fixing portion 31 is formed on the housing 20 .

[0032] Hereinafter, although it is described in this embodiment that the fixing portion 31 is formed on the anti-impact member 10 and the insertion portion 32 is formed on the housing 20 , this is only one embodiment, and as described above, the fixing portion 31 and the insertion portion 32 may be formed on different members.

[0033] The fixing portion 31 is disposed on any one of the outer circumferential surface of the anti-impact member 10 and the inner circumferential surface of the housing 20, and includes: a coupling groove 311, which is formed to extend on the surface in the circumferential direction and is formed to be recessed inward; an entrance 312, which is formed on one side of the coupling groove 311 to allow the insertion portion 32 to enter and exit; and a latch claw 313, which is formed to extend along the coupling groove 311 to close a portion of the top of the coupling groove 311.

[0034] The coupling groove 311 is formed to extend in the circumferential direction from one of the outer circumferential surface of the anti-impact member 10 and the inner circumferential surface of the housing 20 , and is formed to be recessed inwardly from the surface so as to place the inserted insertion portion 32 .

[0035] Next, an embodiment in which the fixing portion 31 is formed on the outer peripheral surface of the anti-impact member 10 will be described.

[0036] Here, the fact that the coupling groove 311 is formed in the circumferential direction of the anti-impact member 10 is for coupling or separating the housing 20 and the anti-impact member 10 by rotating the housing 20 rightward or leftward in the circumferential direction when coupling or separating the housing 20 and the anti-impact member 10 .

[0037] The inlet 312 is provided on one side end of the coupling groove 311 to allow the insertion portion 32 to enter and exit the coupling groove 311 , and the width of the inlet 312 is equal to the width of the coupling groove 311 .

[0038] Here, the inlet 312 includes a main inlet 314 through which the fixing protrusion 322 of the inserting portion 32 enters and exits, and a path groove 315 through which the supporting piece 321 of the inserting portion 32 moves.

[0039] At this time, the path groove 315 is formed by the clasping claw 313. After the fixing protrusion 322 is inserted through the main entrance 314, the support member 321 moves along the path groove 315, and the fixing protrusion 322 is clasped by the clasping claw 313, thereby preventing separation.

[0040] The catch 313 is formed from one side end of the inlet 312 in the circumferential direction (i.e., along the coupling groove 311) to close a portion of the open top of the coupling groove 311, and a pair of the catches 313 face each other to provide a path groove 315. In this case, the ends of the catches 313 are formed to be spaced apart from each other.

[0041] The insertion portion 32 is disposed on any one of the outer peripheral surface of the anti-impact member 10 and the inner peripheral surface of the housing 20, and includes: a support member 321 protruding outward from the surface; and a fixing protrusion 322 formed on the front end portion of the support member 321, having an area wider than that of the support member 321, and inserted and fixed to the fixing portion 31.

[0042] Next, an embodiment in which the insertion portion 32 is formed on the inner surface of the housing 20 will be described.

[0043] The support piece 321 protrudes outward from the inner surface of the housing 20 , ie, toward the anti-impact member 10 contacting the inner peripheral surface of the housing 20 .

[0044] Here, the length and width of the support piece 321 are configured to have sizes corresponding to the width of the path groove 315 and the depth of the coupling groove 311 to move along the path groove 315 formed by the clasp 313 .

[0045] The fixing protrusion 322 is formed at the front end portion of the support piece 321 to enter and exit the inlet 312 of the fixing portion 31 , and when seated in the coupling groove 311 , is restricted from being separated by the clasp claw 313 .

[0046] The detachable device 30 allows the anti-impact member 10 and the housing 20 to be combined by the fixing protrusion 322 , which is inserted into the inlet 312 and then restricted from moving by the clasp 313 after being combined while the support 321 moves along the path groove 315 .

[0047] The detachable device 30 may be formed in plural at positions spaced apart from each other based on the center points of the anti-impact member 10 and the housing 20 , thereby providing a strong bonding force.

[0048] In addition, in order to separate the anti-impact member 10 and the shell 20 from each other through the detachable device 30, the anti-impact member 10 and the shell 20 are rotated in a direction opposite to the coupling direction, and then the fixing protrusion 322 is moved toward the inlet 312, thereby reducing the coupling time and separation time of the anti-impact member 10 and the shell 20 and improving convenience.

[0049] At the same time, after the impact-resistant member 10 and the shell 20 are combined together and detachably coupled to the shoulder for use, during the process of replacing the damaged or worn impact-resistant member and the shell, a fixing flange 40 is provided to maintain the sealing of the coupled parts of the liner, shoulder and nozzle of the pressure vessel.

[0050] The fixing flange 40 is formed in an annular shape with a hollow center to fit on the outer surface of the shoulder, and is arranged so that the end of the fixing flange 40 contacts the outer surface of the shoulder, and then fixed as one by welding or bonding.

[0051] A plurality of fastening holes 41 are formed at a plurality of locations spaced apart from each other on the fixing flange 40 and the housing 20 , wherein the fastening bolts 50 are engaged with the fastening holes 41 to fix the housing 20 to the fixing flange 40 .

[0052] Here, it is desirable that the fastening hole 41 formed on the housing 20 is formed at a position where the insertion position of the fastening bolt 50 does not damage the coupled anti-impact member 10 .

[0053] like Figure 5 As shown, the housing 20 has an expansion surface 23 that expands relatively outward compared to the outer surface area of ​​the anti-impact member 10 , and a plurality of fastening holes 22 engaged with the fastening bolts 50 are radially formed on the expansion surface 23 .

[0054] Reference Figures 6 to 10 , a protective cover 100 for a shoulder of a pressure vessel according to a second embodiment of the present invention will be described.

[0055] As described above, the fixing portion 131 is disposed on any one of the outer circumferential surface of the anti-impact member 110 and the inner circumferential surface of the housing 120, and includes: an inlet groove 311 formed inwardly from the edge toward the center; and a seat groove 312 that is vertically bent at one side end of the inlet groove 311 and extends in the circumferential direction.

[0056] The inlet groove 311 is formed to be recessed straightly from the edge of the inner peripheral surface of the housing 120 toward the center to allow an insertion protrusion 321 of the insertion portion 132 to be described later to enter and exit.

[0057] Here, the width of the inlet groove 311 is made to correspond to the width of the insertion protrusion 321 , and the depth of the inlet groove 311 is made to correspond to the protrusion height of the insertion protrusion 321 .

[0058] In addition, the inlet groove 311 is provided in plurality at positions spaced apart in the circumferential direction of the housing 120 , and preferably, the plurality of inlet grooves 311 are radially formed based on the center point of the housing 120 .

[0059] The seat groove 312 is vertically bent at one side end of the inlet groove 311 and is formed to extend in the circumferential direction of the inner circumferential surface of the housing 120 , wherein the insertion protrusion 321 is seated therein after being inserted to fix the housing 120 and the anti-impact member 110 .

[0060] After the seat groove 312 is vertically bent from one side end of the entrance groove 311 , the insertion protrusion 321 inserted through the entrance groove 311 moves to one side end of the entrance groove 311 , and then moves along the seat groove 312 and is seated on the seat groove to fix the anti-impact member 110 and the housing 120 .

[0061] The seat groove 312 is vertically bent from the entrance groove 311. After the insertion protrusion 321 is inserted into the entrance groove 311, when either the housing 120 or the anti-impact member 110 rotates in one direction, the insertion protrusion 321 moves to the seat groove 312 and is seated on the seat groove 312 to fix the anti-impact member 110 and the housing 120.

[0062] Meanwhile, the seat groove 312 further includes a stopper protrusion 313 to prevent the inserted insertion protrusion 321 from moving arbitrarily due to vibration or impact from the outside after being installed.

[0063] The stop protrusion 313 protrudes outward from the surface of the seat groove 312 and is formed at the longitudinal center of the seat groove 312, thereby preventing the insertion protrusion 321 from moving in the opposite direction, i.e., toward the entrance groove 311, due to vibration or impact transmitted from the outside after the insertion protrusion 321 moves over the stop protrusion 313.

[0064] At this time, the cross-section of the blocking protrusion 313 can be various shapes such as circular, semicircular, square, trapezoidal, etc., and is not limited to the semicircular shape shown in the figure.

[0065] The insertion portion 132 is configured to be detachably combined with the fixing portion 131 , is provided on any one of the outer circumferential surface of the anti-impact member 110 and the inner circumferential surface of the housing 120 , and includes an insertion protrusion 321 protruding outward from the surface.

[0066] Hereinafter, an embodiment in which the insertion protrusion 321 is formed on the outer circumferential surface of the anti-impact member 110 will be described.

[0067] The insertion protrusion 321 protrudes outward from the outer peripheral surface of the anti-impact member 110 , and is configured to have a trapezoidal cross-section that becomes narrower toward a protruding front end.

[0068] That is, the insertion protrusion 321 has a trapezoidal shape having a narrow width at a protruding front end and a wide width toward the surface side of the anti-impact member 10 , and moves and is seated on the seat groove 312 after being inserted into the inlet groove 311 .

[0069] In this case, the insertion protrusion 321 is seated after passing over the catch protrusion 313 protruding outward from the surface of the seat groove 312, and then fixes the anti-impact member 110 and the housing 120. As described above, the movement of the insertion protrusion 321 is restricted by the catch protrusion 313, thereby preventing positional deviation due to vibration or impact from the outside.

[0070] At the same time, the second embodiment is similar to the first embodiment in that after the impact-resistant member 110 and the shell 120 are combined together and detachably coupled to the shoulder for use, during the process of replacing the damaged or worn impact-resistant member and the shell, the fixing flange 140 is configured to maintain the sealing of the combined portion of the liner, shoulder and nozzle of the pressure vessel.

[0071] Reference Figures 11 to 15 , a protective cover for a shoulder of a pressure vessel according to a third embodiment of the present invention will be described.

[0072] To this end, in the present invention, the detachable device 230 includes a retaining portion 231 and a matching portion 232, wherein the retaining portion 231 has a fixing groove 311 and a push rod 312, the fixing groove 311 is formed at a position spaced apart from the edge of the outer shell 220 toward the center, and the push rod 312 is rotatably mounted on the outer shell 220 to elastically press the outer surface of the anti-impact member 210 or return to the original position; the matching portion 232 protrudes outward from the outer surface of the anti-impact member 210 and includes a coupling protrusion 321 arranged on the fixing groove 311.

[0073] The retaining portions 231 are formed in plurality at positions spaced apart in the circumferential direction of the housing 220 , and the fitting portions 232 detachably coupled to the retaining portions 231 are formed in plurality at positions spaced apart in the circumferential direction of the outer surface of the anti-impact member 210 .

[0074] The holding portion 231 includes a fixing groove 311 formed through a position spaced from an edge toward the center of the housing 220 and a push rod 312 rotatably mounted on the housing 220 to elastically press the outer surface of the anti-impact member 210 or return to an original position.

[0075] The fixing groove 311 is formed through at a position spaced apart from the edge toward the center of the housing 220 to allow the coupling protrusion 321 to enter and exit.

[0076] The push rod 312 applies pressure to the outer surface of the anti-impact member 210 to separate the coupling protrusion 321 inserted into the fixing groove 311 from the fixing groove 311 and returns to its original position by elastic restoring force after the pressure is applied.

[0077] To this end, the push rod 312 is configured in a flat plate shape elongated in the longitudinal direction and is rotatably provided on the housing 220 to elastically press or return against the outer surface of the impact member 210 .

[0078] The push rod 312 prevents positional deviation by contacting the end of the coupling protrusion 321 inserted into the fixing groove 311 to couple the anti-impact member and the housing. To disassemble the anti-impact member, when pressure is applied to one longitudinal side of the push rod 312, the other longitudinal side rotates upward, so that the coupling protrusion 321 of the anti-impact member 210 is separated from the fixing groove 311.

[0079] Meanwhile, the push rod 312 is rotatably disposed on the housing 220, and for this purpose, a hinge or similar rotating device may be used to allow the push rod 312 to be rotatably mounted on the housing 220. However, in order to reduce manufacturing cost and time, in the present invention, the push rod 312 is formed as one body with the housing 220, and a slit 313 cut into a predetermined width is formed between the push rod 312 and the housing 220.

[0080] In addition, a bridge 314 is provided at the longitudinal center of the push rod 312, connecting the push rod 312 and the housing 220. Therefore, when pressure is applied to one longitudinal side of the push rod 312 with the bridge 314 as a rotation reference, the other longitudinal side of the push rod 312 rotates upward, and the raised push rod 312 returns to its original position.

[0081] When the coupling protrusion 321 is inserted into the fixing groove 311 by the push rod 312, the coupling protrusion 321 is inserted into the fixing groove 311 while pushing the push rod 312 upward. After the coupling protrusion 321 is inserted into the fixing groove 311, the push rod 312 fixes the position of the coupling protrusion 321 inserted into the fixing groove 311 while returning to its original position.

[0082] The fitting portion 232 includes a coupling protrusion 321 detachably coupled to the fixing groove 311 , wherein the coupling protrusion 321 has a block shape protruding outwardly from an outer surface of the anti-impact member 210 .

[0083] Here, the coupling protrusion 321 protrudes to have a curvature gradually decreasing toward the center of the anti-impact member 210 , and a catch surface 322 protruding vertically outward is formed on one side end portion of the coupling protrusion contacting one end of the push rod 312 .

[0084] When the push rod 312 formed on the housing 220 is pushed upward, the coupling protrusion 321 is inserted into the fixing groove and seated in the fixing groove. Thereafter, the coupling protrusion 321 is separated from the fixing groove 311 by a space formed when one side of the push rod 312 is pressed in the longitudinal direction so that the other side in the longitudinal direction rotates upward, thereby detachably coupling the anti-impact member and the housing.

[0085] Meanwhile, the housing 220 further includes an annular surface 315 covering an upper portion of the fixing groove 311 to minimize an exposed area of ​​the anti-impact member 210 coupled to the fixing groove 311 .

[0086] like Fig.15 As shown, the annular surface 315 is configured to extend the housing 20 to cover the upper portion of the fixing groove 311 of the housing 20. In this case, the inner surface of the annular surface 315 has a gentle curvature to match the curvature of the upper surface of the coupling protrusion 321, thereby guiding the extended front end to contact and cover the upper surface of the coupling protrusion 321.

[0087] The annular surface 315 minimizes the exposed area of ​​the anti-impact member exposed through the fixing groove 311 , thereby minimizing the introduction of foreign matter, especially moisture, into the anti-impact member.

[0088] At the same time, the second embodiment is similar to the first embodiment in that after the impact-resistant member 210 and the shell 220 are combined together and detachably coupled to the shoulder for use, during the process of replacing the damaged or worn impact-resistant member and the shell, the fixing flange is configured to maintain the sealing of the combined portion of the liner, shoulder and nozzle of the pressure vessel.

Claims

1. A protective cover for a shoulder of a pressure vessel, the protective cover being coupled to a dome-shaped shoulder located on one side or both sides of the pressure vessel to protect the shoulder, the protective cover comprising: impact-resistant member made of impact-absorbing foam; an outer shell bonded to the anti-impact member while surrounding the anti-impact member; as well as A detachable device is used to detachably combine the anti-impact member and the housing with each other.

2. The protective cover according to claim 1, wherein: The detachable device comprises: a fixing portion provided on one of the anti-impact member and the housing; and An insert portion is provided on the other of the anti-impact member and the housing.

3. The protective cover according to claim 2, wherein: The fixing portion is provided on any one of an outer peripheral surface of the anti-impact member and an inner peripheral surface of the housing, and Wherein, the fixing part comprises: A coupling groove formed on the surface to extend in a circumferential direction and formed to be recessed inwardly; an inlet formed on one side of the coupling groove to allow the insertion portion to enter and exit; and The buckle claw is formed to extend along the coupling groove to close a portion of the top of the coupling groove.

4. The protective cover according to claim 2, wherein: The insertion portion is provided on any one of an outer peripheral surface of the anti-impact member and an inner peripheral surface of the housing, and Wherein, the inserting part comprises: a support member protruding outwardly from the surface; and A fixing protrusion is formed on a front end portion of the support member, has an area wider than that of the support member, and is inserted and fixed to the fixing portion.

5. The protective cover according to claim 2, wherein: The fixing portion is provided on any one of an outer peripheral surface of the anti-impact member and an inner peripheral surface of the housing, and Wherein, the fixing part comprises: an inlet slot formed inwardly from the edge toward the center; and The seat groove is vertically bent at one end of the inlet groove and extends in the circumferential direction.

6. The protective cover according to claim 5, wherein: The seat groove also includes a stopper protrusion protruding outward from the surface.

7. The protective cover according to claim 2, wherein: The insertion portion is provided on any one of an outer peripheral surface of the anti-impact member and an inner peripheral surface of the housing, and includes an insertion protrusion protruding outward from the surface.

8. The protective cover according to claim 7, wherein: The insertion protrusion has a trapezoidal-shaped cross section, wherein a width of the cross section narrows toward a protruding front end.

9. The protective cover according to claim 1, wherein: The detachable device comprises: a holding portion having a fixing groove and a push rod, the fixing groove being formed at a position spaced apart from an edge toward a center of the housing, and the push rod being rotatably mounted on the housing to elastically press an outer surface of the anti-impact member or return to an original position; and The matching portion protrudes outward from the outer surface of the anti-impact member and includes a coupling protrusion disposed on the fixing groove.

10. The protective cover according to claim 9, wherein: The push rod comprises: a slit formed by cutting an outer surface of the housing; and a bridge member connecting the push rod and the housing, and When one side of the push rod in the longitudinal direction is pressed based on the bridge piece, the other side of the push rod in the longitudinal direction moves upward, and when the pressure is released, the push rod returns to the original position.

11. The protective cover according to claim 9, wherein: The combining protrusion protrudes to have a curvature that gradually decreases toward the center of the anti-impact member, and Wherein, a stopper surface protruding vertically outward is formed on one end of the combining protrusion that contacts one end of the push rod.

12. The protective cover according to claim 9, wherein: The retaining portion further includes an annular surface thereon to minimize an exposed area of ​​the inserted coupling protrusion by covering an upper portion of the fixing groove.

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