A door and window breaking device for fire fighting and rescue

Abstract

The application relates to a door and window breaking device for fire extinguishing and rescue, which comprises a fixing frame, a breaking module and an explosion-proof module. The fixing frame is in a cylindrical hollow structure, the breaking module is arranged at the upper end in the fixing frame, the explosion-proof module is arranged at the lower end outside the fixing frame, and the inner side of the explosion-proof module is matched with the lower end of the breaking module. In the application, the explosion-proof unit is arranged, the explosion-proof pads are arranged between the adjacent pressing frames through the plug-in frames, and the adsorption pads can be effectively adsorbed with the door and window glass, so that the door and window glass cannot be scattered when being broken, and the user or the rescued person is prevented from being hurt when the glass is broken.

Description

Technical Field

[0001] This application relates to the field of fire rescue technology, and in particular to a door and window breaking device for fire fighting and rescue. Background Technology

[0002] In fields such as firefighting and emergency rescue, breaking windows is a common operation to try to rescue trapped people or reduce losses or prevent the disaster from spreading in a short time. Accordingly, various window breaking tools are frequently used in traffic rescue, emergency departments, fire departments, traffic police, etc., to quickly remove the glass from doors and windows in the event of fire, earthquake, car accident, or emergency rescue.

[0003] Currently, existing door and window glass breaking processes typically have the following drawbacks: 1. Existing equipment usually only breaks the glass at a single point, failing to shatter the entire glass and requiring manual secondary cleaning; 2. Existing equipment does not provide protection, as the glass shatters easily scatter, causing scratches and hindering subsequent use. Summary of the Invention

[0004] In order to enable the rapid breaking of window and door glass, this application provides a window and door breaking device for fire fighting and rescue.

[0005] The technical solution of the door and window breaking device for fire fighting and rescue provided in this application is as follows:

[0006] A door and window breaking device for fire fighting and rescue includes a fixed frame, a breaking module and an explosion-proof module. The fixed frame has a cylindrical hollow structure. The breaking module is installed at the upper end inside the fixed frame, and the explosion-proof module is installed at the lower end outside the fixed frame. The inner side of the explosion-proof module cooperates with the lower end of the breaking module.

[0007] The crushing module includes a connecting frame, a guide rod, a linear bearing, a compression spring, a crushing die, and a limiting frame. The connecting frame is installed on the upper end of the fixed frame. The connecting frame has a U-shaped structure and is integrally formed with the fixed frame. A flexible pad is provided in the middle of the connecting frame. A guide rod with a T-shaped structure is provided in the middle of the fixed frame. Linear bearings are evenly installed inside the fixed frame. The guide rod is connected to the middle of the linear bearings by a sliding fit. The crushing die is installed on the lower end of the guide rod. A compression spring is provided on the guide rod located between the crushing die and the linear bearing. A limiting frame is installed in the middle of the lower end of the fixed frame and cooperates with the crushing die.

[0008] The explosion-proof module includes a ring frame, a clamping frame, an explosion-proof unit, an ejection unit, and a crushing unit. The ring frame is installed at the lower end of the fixed frame, and clamping frames are evenly installed on the outer side of the ring frame. Explosion-proof units are installed between adjacent clamping frames. The middle part of the clamping frame is a hollow structure, and an ejection unit is installed inside the clamping frame. The inner side of the ejection unit is connected to the crushing die head. The lower end of the clamping frame is evenly provided with through grooves, and crushing units are installed in the through grooves. The upper end of the crushing unit cooperates with the ejection unit.

[0009] Preferably, the crushing die head has a conical structure and is made of hard metal. A crushing block is detachably installed at the lower end of the crushing die head, and the crushing block has a conical structure.

[0010] By adopting the above technical solution, the breaking die head acts as a counterweight. When the breaking die head is pressed down rapidly, it can drive the breaking block to accurately break the glass, which is beneficial for subsequent fire rescue.

[0011] Preferably, the limiting frame has a circular hollow structure, with a conical cavity in the middle of the limiting frame and a buffer washer installed in the middle of the conical cavity.

[0012] By adopting the above technical solution, when the crushing die head descends rapidly, the limiting frame can play a blocking role, and the buffer washer plays a buffering role, preventing the limiting frame and the crushing die head from being damaged by impact.

[0013] Preferably, the explosion-proof unit includes an explosion-proof pad, a plug-in frame, and an adsorption pad. The explosion-proof pad has an arc-shaped structure. The plug-in frame is evenly arranged on the upper end of the explosion-proof pad. The clamping frame is evenly arranged with plug holes that cooperate with the plug-in frame. An adsorption pad is installed on the lower end face of the explosion-proof pad. The adsorption pad is made of flexible material and has adsorption holes evenly arranged on the lower end face of the adsorption pad.

[0014] By adopting the above technical solution, the explosion-proof pad is installed between adjacent clamping frames through a plug-in bracket. The adsorption pad can effectively adsorb with the door and window glass, so that the door and window glass will not shatter and scatter when broken, preventing injury to users or rescued personnel when the glass breaks.

[0015] Preferably, the adsorption pore is filled with an anti-clogging sheet, which is made of sponge material.

[0016] By adopting the above technical solution, the sponge anti-clogging sheet can not only achieve the effect of loose and breathable air, but also prevent broken glass shards from entering the adsorption pad through the adsorption holes, thus avoiding secondary damage caused by glass shards.

[0017] Preferably, the ejection unit includes a top plate, a fixed column, a connecting spring, an ejector rod, and an ejection spring. The top plate is connected to the middle of the clamping frame by a sliding fit. A groove is provided on the outer side of the top plate, and a fixed column is provided in the groove. The fixed column is installed on the clamping frame and a connecting spring is provided on the fixed column. An ejector rod is installed on the inner side of the top plate and is slidably connected to the fixed frame. An ejection spring is provided on the ejector rod. The end of the ejector rod is a smooth arc-shaped surface, and a guide groove that mates with the end of the ejector rod is provided on the crushing die head.

[0018] By adopting the above technical solution, when the crushing die head moves downward, the crushing die head can drive the top plate to expand outward through the push rod, so that the top plate can quickly drive the crushing unit to be pushed out evenly, so that the crushing unit can accurately crush the door and window glass evenly, which is conducive to the accurate breaking of the door and window glass.

[0019] Preferably, the top plate has a uniformly arranged top groove in the middle, the top groove has a trapezoidal cross-section, and the upper end of the crushing unit slides in conjunction with the top groove.

[0020] By adopting the above technical solution, when the top plate expands outward, the ejector groove in the middle of the top plate moves outward synchronously, so that the ejector groove can drive the crushing unit to move outward gradually, which is conducive to the crushing unit breaking the glass.

[0021] Preferably, the crushing unit includes a fixed seat, a crushing needle, and a return spring. The fixed seat is installed in the through groove, the crushing needle is slidably disposed on the upper end of the fixed seat, and the return spring is installed on the crushing needle. The upper end of the return spring is in close contact with the inner wall of the ejection groove.

[0022] By adopting the above technical solution, when the ejector groove in the middle of the top plate moves outward, the ejector groove can drive the breaking needle to be ejected outward, so that the breaking needle can accurately puncture the glass, thereby making the glass break evenly, which is conducive to the accurate breaking of door and window glass and facilitates subsequent rescue.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. In order to prevent the glass from scattering when it breaks, an explosion-proof unit is provided in this invention. The explosion-proof pad is installed between adjacent clamping frames through a plug-in bracket. The adsorption pad can effectively adsorb with the door and window glass, so that the door and window glass will not shatter and scatter when it breaks, thus preventing injury to users or rescued personnel when the glass breaks.

[0025] 2. In order to prevent broken glass shards from entering the adsorption pores, the adsorption pores are filled with anti-clogging sheets in this invention. The anti-clogging sheets are made of sponge material. The sponge material can not only provide a loose and breathable effect, but also prevent broken glass shards from entering the adsorption pad through the adsorption pores, thus avoiding secondary damage caused by glass shards.

[0026] 3. In order to achieve the function of simultaneously ejecting the crushing unit, an ejection unit is provided in this invention. When the crushing die head moves downward, the crushing die head can drive the top plate to expand outward through the ejector rod, so that the top plate can quickly and evenly push out the crushing unit, so that the crushing unit can accurately and evenly crush the door and window glass, which is conducive to the accurate breaking of the door and window glass.

[0027] 4. In order to achieve the function of breaking door and window glass, a crushing unit is set in this invention. When the ejector groove in the middle of the top plate moves outward, the ejector groove can drive the breaking needle to push outward, so that the breaking needle can accurately puncture the glass, thereby making the glass break evenly, which is conducive to the accurate breaking of door and window glass and facilitates subsequent rescue. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a three-dimensional structural diagram of this application.

[0030] Figure 2 This is a cross-sectional structural diagram of this application.

[0031] Figure 3 This is the bottom view of this application.

[0032] Figure 4 This is a cross-sectional structural diagram of this application.

[0033] Figure 5 This is a cross-sectional structural diagram of the fixing frame and the crushing module in this application.

[0034] Figure 6 This is a cross-sectional structural diagram of the explosion-proof unit of this application.

[0035] Figure 7 This is a cross-sectional structural diagram of the clamping frame, ejection unit and crushing unit of this application.

[0036] Figure 8 It is in this application Figure 7 A magnified structural diagram of point A in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Fixed frame; 2. Crushing module; 21. Connecting frame; 22. Guide rod; 23. Linear bearing; 24. Compression spring; 25. Crushing die head; 251. Crushing block; 26. Limiting frame; 3. Explosion-proof module; 31. Ring frame; 32. Pressing frame; 33. Explosion-proof unit; 331. Explosion-proof pad; 332. Plug-in frame; 333. Plug-in frame; 3331. Adsorption hole; 3332. Anti-blocking plate; 34. Ejection unit; 341. Top plate; 342. Fixed column; 343. Connecting spring; 344. Ejector rod; 345. Ejection spring; 35. Crushing unit; 351. Fixed seat; 352. Crushing needle; 353. Return spring. Implementation

[0038] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0039] This application discloses a door and window breaking device for fire fighting and rescue, which can achieve the function of uniformly breaking door and window glass, while preventing the glass from shattering and scattering, which is beneficial to firefighters for subsequent rescue. Example

[0040] Reference Figure 1-5 As shown in this embodiment, a door and window breaking device for fire fighting and rescue is disclosed, including a fixing frame 1, a breaking module 2 and an explosion-proof module 3. The fixing frame 1 has a cylindrical hollow structure. The breaking module 2 is installed at the upper end of the inside of the fixing frame 1, and the explosion-proof module 3 is installed at the lower end of the outside of the fixing frame 1. The inner side of the explosion-proof module 3 cooperates with the lower end of the breaking module 2.

[0041] Reference Figure 5 As shown, the crushing module 2 includes a connecting frame 21, a guide rod 22, a linear bearing 23, a compression spring 24, a crushing die head 25, and a limiting frame 26. The connecting frame 21 is installed on the upper end of the fixed frame 1. The connecting frame 21 has a U-shaped structure and is integrally formed with the fixed frame 1. A flexible pad is provided in the middle of the connecting frame 21. The guide rod 22 has a T-shaped structure and is provided in the middle of the fixed frame 1. Linear bearings 23 are evenly installed inside the fixed frame 1. The guide rod 22 is connected to the middle of the linear bearings 23 by sliding fit. The crushing die head 25 is installed on the lower end of the guide rod 22. A compression spring 24 is provided on the guide rod 22 located between the crushing die head 25 and the linear bearing 23. The limiting frame 26 is installed in the middle of the lower end of the fixed frame 1 and cooperates with the crushing die head 25.

[0042] In actual use, the operator holds the connecting frame 21, places the fixing frame 1 on the surface of the door and window glass, and pulls the guide rod 22 upward. The compression spring 24 is in a compressed state. When the operator quickly releases the hand, the compression spring 24 returns to its original position. The compression spring 24 then drives the breaking die head 25 to quickly pop out and break the door and window glass. The limiting frame 26 plays a limiting role.

[0043] The crushing die 25 has a conical structure and is made of hard metal. A crushing block 251 is detachably installed at the lower end of the crushing die 25. The crushing block 251 has a conical structure.

[0044] In actual use, the breaking die head 25 acts as a counterweight. When the breaking die head 25 is pressed down rapidly, it can drive the breaking block 251 to accurately break the glass, which is beneficial for subsequent fire rescue.

[0045] The limiting frame 26 has a circular hollow structure, and a conical cavity is provided in the middle of the limiting frame 26. A buffer washer is installed in the middle of the conical cavity.

[0046] In actual use, when the crushing die 25 descends rapidly, the limit frame 26 can act as a stop, and the buffer washer can act as a buffer to prevent the limit frame 26 and the crushing die 25 from being damaged by impact. Example

[0047] Reference Figure 1-8 As shown, based on Embodiment 1, in order to prevent the doors and windows from shattering and scattering when broken, and to achieve the function of uniformly breaking the glass of the doors and windows, a corresponding explosion-proof module 3 is set in Embodiment 2.

[0048] like Figure 2 As shown, the explosion-proof module 3 includes a ring frame 31, a clamping frame 32, an explosion-proof unit 33, an ejection unit 34, and a crushing unit 35. The ring frame 31 is installed at the lower end of the fixed frame 1. The clamping frames 32 are evenly installed on the outer side of the ring frame 31. The explosion-proof unit 33 is installed between adjacent clamping frames 32. The middle part of the clamping frame 32 is hollow. The ejection unit 34 is installed inside the clamping frame 32. The inner side of the ejection unit 34 is connected to the crushing die head 25. The lower end of the clamping frame 32 is evenly provided with through grooves. The crushing unit 35 is installed in the through grooves. The upper end of the crushing unit 35 cooperates with the ejection unit 34.

[0049] In actual use, the explosion-proof unit 33 is evenly installed in the gap between adjacent clamping frames 32. The explosion-proof unit 33 can accurately adhere to the glass of the door and window, thereby preventing the broken glass from scattering and avoiding glass shards from causing injury to rescuers or rescued persons. When the breaking module 2 moves downward to break the glass, the breaking module 2 can simultaneously drive the ejection unit 34 to expand outward. The ejection unit 34 can then drive the crushing unit 35 to be pushed outward in sync, so that the crushing unit 35 can evenly break the glass of the door and window, resulting in good breaking effect and complete breakage, without the need for secondary manual cleaning.

[0050] Reference Figure 6 As shown, in order to prevent the glass from scattering when it breaks, an explosion-proof unit 33 is provided in this embodiment. The explosion-proof unit 33 includes an explosion-proof pad 331, a plug-in frame 332, and an adsorption pad 333. The explosion-proof pad 331 has an arc-shaped structure. The plug-in frame 332 is evenly arranged on the upper end of the explosion-proof pad 331. The clamping frame 32 is evenly arranged with plug holes that cooperate with the plug-in frame 332. An adsorption pad 333 is installed on the lower end face of the explosion-proof pad 331. The adsorption pad 333 is made of flexible material and has adsorption holes 3331 evenly arranged on the lower end face of the adsorption pad 333.

[0051] In actual use, the explosion-proof pad 331 is installed between adjacent clamping frames 32 through the plug-in bracket 332. The adsorption pad 333 can effectively adsorb with the door and window glass, so that the door and window glass will not shatter and scatter when broken, preventing injury to users or rescued personnel when the glass breaks.

[0052] It should be noted that a cavity is provided between the adsorption pad 333 and the explosion-proof pad 331. When the explosion-proof pad 331 is pressed down, the air inside the cavity is completely discharged, making the cavity under negative pressure, so that the adsorption pad 333 can be accurately adsorbed onto the surface of the door and window glass.

[0053] Continue to refer to Figure 6 As shown, in order to prevent broken glass shards from entering the adsorption hole 3331, in this embodiment, the adsorption hole 3331 is filled with an anti-clogging sheet 3332, which is made of sponge material.

[0054] In actual use, the sponge anti-clogging sheet 3332 can not only provide a loose and breathable effect, but also prevent broken glass shards from entering the adsorption pad 333 through the adsorption holes 3331, thus avoiding secondary damage caused by glass shards.

[0055] Reference Figure 7As shown, in order to achieve the function of simultaneously ejecting the crushing unit 35, an ejection unit 34 is provided in this embodiment. The ejection unit 34 includes a top plate 341, a fixed column 342, a connecting spring 343, an ejector rod 344, and an ejection spring 345. The top plate 341 is connected to the middle of the clamping frame 32 by a sliding fit. A sliding groove is provided on the outer side of the top plate 341, and a fixed column 342 is provided in the sliding groove. The fixed column 342 is installed on the clamping frame 32, and a connecting spring 343 is provided on the fixed column 342. An ejector rod 344 is installed on the inner side of the top plate 341. The ejector rod 344 is slidably connected to the fixed frame 1. An ejection spring 345 is provided on the ejector rod 344. The end of the ejector rod 344 is a smooth arc surface. A guide groove that cooperates with the end of the ejector rod 344 is provided on the crushing die head 25.

[0056] In actual use, when the crushing die head 25 moves downward, the crushing die head 25 can drive the top plate 341 to expand outward through the push rod 344, so that the top plate 341 can quickly drive the crushing unit 35 to be pushed out evenly, so that the crushing unit 35 can accurately crush the door and window glass evenly, which is conducive to the accurate breaking of the door and window glass.

[0057] In order to accurately drive the crushing unit 35 out, in this embodiment, an ejection groove is uniformly provided in the middle of the top plate 341. The ejection groove has a trapezoidal cross-section and a smooth inner wall. The upper end of the crushing unit 35 slides in conjunction with the ejection groove.

[0058] In actual use, when the top plate 341 expands outward, the ejector groove in the middle of the top plate 341 moves outward synchronously, so that the ejector groove can drive the crushing unit 35 to move outward gradually, which is beneficial for the crushing unit 35 to break the glass.

[0059] Reference Figure 8 As shown, in order to achieve the function of breaking the glass of doors and windows, a crushing unit 35 is provided in this embodiment. The crushing unit 35 includes a fixed seat 351, a breaking needle 352 and a return spring 353. The fixed seat 351 is installed in the through groove. The breaking needle 352 is slidably arranged on the upper end of the fixed seat 351. The return spring 353 is installed on the breaking needle 352. The upper end of the return spring 353 is in close contact with the inner wall of the ejection groove.

[0060] In actual use, when the ejector groove in the middle of the top plate 341 moves outward, the ejector groove can drive the breaking needle 352 to be ejected outward, so that the breaking needle 352 can accurately puncture the glass, thereby making the glass break evenly, which is conducive to the accurate breaking of door and window glass and facilitates subsequent rescue.

[0061] This embodiment also provides a method for using a door and window breaking device for fire fighting and rescue, including the following steps:

[0062] S1. Door and window glass adsorption fixation: The explosion-proof unit 33 is evenly installed in the gap between adjacent clamping frames 32. When the explosion-proof pad 331 is pressed down, the air inside the cavity is completely discharged, making the cavity under negative pressure. The adsorption pad 333 can then accurately adsorb onto the surface of the door and window glass.

[0063] S2. When the window glass breaks, pull the guide rod 22 upward. The compression spring 24 is in a compressed state. When the manual releases the hand quickly, the compression spring 24 returns to its original position. The compression spring 24 then drives the breaking die head 25 to pop out quickly and break the window glass. At the same time, the breaking module 2 can drive the ejection unit 34 to expand outward. The ejection unit 34 can then drive the crushing unit 35 to push outward synchronously, so that the crushing unit 35 can break the window glass evenly.

[0064] S3. Glass explosion protection: The explosion protection pad 331 is installed between adjacent clamping frames 32 through the plug-in bracket 332. The adsorption pad 333 can effectively adsorb with the door and window glass, so that the door and window glass will not shatter and scatter when broken, preventing injury to users or rescued personnel when the glass breaks.

[0065] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A door and window breaking device for fire fighting and rescue, comprising a fixing frame (1), a breaking module (2), and an explosion-proof module (3), characterized in that, The fixing frame (1) has a cylindrical hollow structure. A crushing module (2) is installed at the upper end of the fixing frame (1), and an explosion-proof module (3) is installed at the lower end of the outer side of the fixing frame (1). The inner side of the explosion-proof module (3) cooperates with the lower end of the crushing module (2). The crushing module (2) includes a connecting frame (21), a guide rod (22), a linear bearing (23), a compression spring (24), a crushing die (25), and a limiting frame (26). The connecting frame (21) is installed on the upper end of the fixed frame (1). The connecting frame (21) has a U-shaped structure and is integrally formed with the fixed frame (1). A flexible pad is provided in the middle of the connecting frame (21). A guide rod (22) is provided in the middle of the fixed frame (1). The guide rod (22) has a T-shape. The structure is as follows: linear bearings (23) are evenly installed inside the fixed frame (1); the guide rod (22) is connected to the middle of the linear bearing (23) by sliding fit; the lower end of the guide rod (22) is equipped with a crushing die head (25); a compression spring (24) is provided on the guide rod (22) located between the crushing die head (25) and the linear bearing (23); a limit frame (26) is installed in the middle of the lower end of the fixed frame (1); the limit frame (26) cooperates with the crushing die head (25). The explosion-proof module (3) includes a ring frame (31), a clamping frame (32), an explosion-proof unit (33), an ejection unit (34), and a crushing unit (35). The ring frame (31) is installed at the lower end of the fixed frame (1). The clamping frame (32) is evenly installed on the outer side of the ring frame (31). An explosion-proof unit (33) is installed between adjacent clamping frames (32). The middle part of the clamping frame (32) is hollow. The ejection unit (34) is installed inside the clamping frame (32). The inner side of the ejection unit (34) is connected to the crushing die head (25). The lower end of the clamping frame (32) is evenly provided with through grooves. The crushing unit (35) is installed in the through grooves. The upper end of the crushing unit (35) cooperates with the ejection unit (34). The ejection unit (34) includes a top plate (341), a fixed column (342), a connecting spring (343), an ejector rod (344), and an ejection spring (345). The top plate (341) is connected to the middle of the clamping frame (32) by a sliding fit. A sliding groove is provided on the outer side of the top plate (341), and a fixed column (342) is provided in the sliding groove. The fixed column (342) is installed on the clamping frame (32), and a connecting spring (343) is provided on the fixed column (342). An ejector rod (344) is installed on the inner side of the top plate (341). The ejector rod (344) is slidably connected to the fixed frame (1). An ejection spring (345) is provided on the ejector rod (344). The end of the ejector rod (344) is a smooth arc surface. A guide groove that cooperates with the end of the ejector rod (344) is provided on the crushing die head (25). The top plate (341) is uniformly provided with an ejector groove in the middle. The ejector groove has a trapezoidal cross-section and the upper end of the crushing unit (35) slides in conjunction with the ejector groove.

2. The door and window breaking device for fire fighting and rescue according to claim 1, characterized in that: The crushing die (25) has a conical structure and is made of hard metal. A crushing block (251) is detachably installed at the lower end of the crushing die (25). The crushing block (251) has a conical structure.

3. The door and window breaking device for fire fighting and rescue according to claim 1, characterized in that: The limiting frame (26) has a circular hollow structure, and a conical cavity is provided in the middle of the limiting frame (26), with a buffer washer installed in the middle of the conical cavity.

4. The door and window breaking device for fire fighting and rescue according to claim 1, characterized in that: The explosion-proof unit (33) includes an explosion-proof pad (331), a plug-in bracket (332), and an adsorption pad (333). The explosion-proof pad (331) has an arc-shaped structure. The plug-in bracket (332) is evenly arranged on the upper end of the explosion-proof pad (331). The clamping bracket (32) is evenly arranged with plug holes that cooperate with the plug-in bracket (332). An adsorption pad (333) is installed on the lower end face of the explosion-proof pad (331). The adsorption pad (333) is made of flexible material. Adsorption holes (3331) are evenly arranged on the lower end face of the adsorption pad (333).

5. The device according to claim 4, characterized in that: The adsorption hole (3331) is filled with an anti-clogging sheet (3332), which is made of sponge material.

6. The door and window breaking device for fire fighting and rescue according to claim 1, characterized in that: The crushing unit (35) includes a fixed seat (351), a crushing needle (352), and a return spring (353). The fixed seat (351) is installed in the through groove. The crushing needle (352) is slidably arranged on the upper end of the fixed seat (351). The return spring (353) is installed on the crushing needle (352). The upper end of the return spring (353) is in close contact with the inner wall of the ejection groove.

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