An oxygen mask PSU panel lock with stable locking function

Abstract

The present invention discloses an oxygen mask PSU panel lock with a stable locking function, relating to the technical field of PSU panel locks. The present invention comprises an oxygen mask housing, a PSU baffle movably mounted on the bottom of the oxygen mask housing via a hinge, a first through-hole extending through the surface of the PSU baffle, a base fixed to the outer wall of the oxygen mask housing, a rotating shaft rotatably disposed on the base, an armature fixed to the rotating shaft, a support shaft rotatably disposed on one side of the base, a ratchet mechanism disposed between the support shaft and the armature, a slide groove disposed on the front side of the base, a gear mechanism disposed between the slide groove and the support shaft, a snap-fit ​​structure disposed at the bottom of the gear mechanism, which cooperates with the first through-hole, and a bistable electromagnet disposed on one side of the base, which cooperates with the armature to facilitate the limited locking and release of the PSU baffle.

Description

Technical Field

[0001] The invention belongs to the technical field of PSU panel locks, and in particular relates to an oxygen mask PSU panel lock with a stable locking function. Background Art

[0002] In order to provide oxygen to the passengers on the aircraft (for example, when there is a sudden loss of cabin pressure), an oxygen mask is installed above each seat. Normally, the passenger oxygen mask is stored inside the PSU panel. When the passenger oxygen system is working, the PSU panel lock mechanism is powered on and unlocked, and the mask is released under the action of its own gravity. It can also be opened manually with the help of external objects.

[0003] Traditional PSU panel locks use a steel ball-spring locking mechanism. When working, the spring is compressed due to the action of magnetic force, and the three built-in steel balls are limited by force, and the device is locked.

[0004] In actual application, the following problems exist:

[0005] 1. The inertia of the steel ball itself may cause the steel ball position to be unrestricted or to slip, resulting in the steel ball being unable to lock the steel needle and unable to achieve stable locking;

[0006] 2. When the acceleration loading direction is upward, due to the upward inertial force, the steel ball will move upward, causing the original compression of the spring to increase, thereby increasing the counterclockwise torque, making the lock easy to open abnormally, causing the PSU panel to fall off abnormally.

[0007] To this end, we designed an oxygen mask PSU panel lock with a stable locking function to solve the above problems. Summary of the Invention

[0008] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0009] The present invention is an oxygen mask PSU panel lock with a stable locking function, comprising an oxygen mask box body, a PSU baffle movably mounted on the bottom of the oxygen mask box body through a hinge, a first through-hole passing through the surface of the PSU baffle, a base fixed to the outer wall of the oxygen mask box body, a rotating shaft rotatably arranged on the base, an armature fixed on the rotating shaft, a support shaft rotatably arranged on one side of the base, a ratchet mechanism provided between the support shaft and the armature, a slide groove provided on the front side of the base, a gear mechanism provided between the slide groove and the support shaft, a snap-fit ​​structure provided at the bottom of the gear mechanism, which cooperates with the first through-hole.

[0010] The gear mechanism includes a rack, which is movably arranged inside a slide groove, a first gear is provided on the front side of the support shaft surface, the first gear is engaged with the rack, a rotating rod is provided on one side of the rack, the rotating rod is rotatably connected to the base, a second gear is provided on the rotating rod, the second gear is provided on the lower side of the first gear, and the second gear is engaged with the rack.

[0011] The buckle structure includes a limit seat, the limit seat is fixed to the top of the rack, and the limit seat is an L-shaped structure, the transverse portion of the limit seat cooperates with the base, a fixing block is fixed on the base, a first spring is connected between the top of the limit seat and the fixing block, a strip plate is fixed to the bottom of the rack, and the bottom of the strip plate is fixed to the connecting block through a connecting rod, two fixing plates are relatively fixed on one side of the connecting block, a connecting plate is rotatably arranged between the two fixing plates, a card plate is fixed to the movable end of the connecting plate, a second spring is connected between the card plate and the connecting block, and the card plate and the connecting block both cooperate with the first through hole, and two connecting ropes are fixed between the rotating rod and the card plate.

[0012] A bistable electromagnet is provided on a side of the first gear away from the rack. The bistable electromagnet is mounted on a base and cooperates with the armature.

[0013] The ratchet mechanism includes a pawl and a ratchet, the pawl is welded and fixed on the inner side of the armature, the ratchet is arranged on the rear side of the first gear, and the ratchet is sleeved on the support shaft, the pawl and the ratchet cooperate with each other, and two slots are provided on the support shaft, and spring retaining rings are provided in the slots, and the two spring retaining rings respectively cooperate with the first gear and the front surface of the ratchet.

[0014] A spring sleeve is provided on one side of the bistable electromagnet, a third spring is provided inside the spring sleeve, and the upper end of the third spring cooperates with the armature.

[0015] Two pulleys are provided on both the front and rear surfaces of the strip plate. The connecting rope passes between two adjacent pulleys. The pulleys are rotatably connected to the strip plate.

[0016] A second through hole is passed through the PSU baffle, and a circular groove is provided at the bottom of the movable end of the armature, and the second through hole and the circular groove cooperate with each other.

[0017] A telescopic rod is provided inside the first spring, and the upper and lower ends of the telescopic rod are fixedly connected to the limit seat and the fixing block respectively.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention facilitates squeezing the movable end of the card plate in a direction away from the connecting block through the elastic action of the second spring and the rotational cooperation between the connecting plate and the fixed plate, so that the movable end of the card plate abuts against the bottom of the PSU baffle, limiting the position of the PSU baffle and placing the PSU baffle in a closed state. At the same time, combined with the meshing action of the first gear and the rack, and the mutual cooperation of the pawl and the ratchet, the rack is effectively limited and clamped, avoiding the free fall of the rack due to gravity, thereby stabilizing the bottom card plate on the lower side of the PSU baffle, ensuring that the PSU baffle is stably maintained in a locked and closed state, and effectively preventing the PSU baffle from automatically falling off. This solves the problem that during the use of the traditional PSU panel lock, the inertia force of the steel ball itself may cause the steel ball position to be unrestricted or slip, resulting in the steel ball being unable to lock the steel needle and unable to achieve stable locking. At the same time, it solves the problem that when the traditional PSU panel lock encounters the aircraft acceleration loading direction upward, due to the upward inertia force, the steel ball will move upward, making the original compression of the spring larger, thereby increasing the counterclockwise torque, making the lock easy to open abnormally, and causing the PSU panel to fall off abnormally. It effectively prevents the PSU panel lock from loosening when the aircraft encounters severe turbulence during flight, ensuring the stability of the locked state of the PSU panel lock;

[0020] 2. The present invention facilitates the detachment of the pawl from the ratchet wheel through the cooperation between the bistable electromagnet and the armature, so that the ratchet wheel and the first gear are no longer restricted and can rotate freely, thereby eliminating the limit on the rack and moving downward under the action of gravity. Combined with the meshing action of the rack and the second gear, the second gear is driven to rotate, and the rotating rod is driven to rotate synchronously, thereby achieving the purpose of winding the connecting rope, and then driving the clamping plate to rotate and detach from the PSU baffle, thereby achieving the effect of releasing and opening the PSU baffle. In addition, the cooperation between the second through hole and the circular groove can realize the purpose of manually opening the PSU baffle, adapting to different usage conditions and ensuring the use effect of the PSU panel lock;

[0021] 3. The present invention adopts a combination of the rotational movement of the card plate and the vertical movement of the rack as a whole, and no longer designs a separate locking structure, so that the entire device has a compact structure, is easy to install, is light in weight, and has stronger stability. It can effectively eliminate the impact of vibration during the flight of the aircraft on the PSU panel lock. At the same time, the bistable electromagnet has a stable magnetic attraction when the power is off, which can keep the PSU baffle stable in a locked and closed state without energy consumption. The device as a whole adopts a more common mechanical structure, does not use special materials, and can overcome more extreme working conditions.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a structural schematic diagram of the locked state of an oxygen mask PSU panel lock with a stable locking function according to the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 4 for Figure 1 A top view of

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of CC in the middle section;

[0029] Figure 6 for Figure 4 Schematic diagram of the structure of DD in the middle section;

[0030] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at E in the middle;

[0031] Figure 8 for Figure 6 Schematic diagram of the enlarged structure at F in the middle;

[0032] Figure 9 for Figure 1 Structural diagram from another perspective;

[0033] Figure 10 for Figure 9 Schematic diagram of the enlarged structure at G in the middle;

[0034] Figure 11 for Figure 1 Schematic diagram of the bottom structure;

[0035] Figure 12 for Figure 11 Schematic diagram of the enlarged structure at H in the middle;

[0036] Figure 13 This is a structural diagram of the spring retaining ring and the support shaft in the present invention in a separated state;

[0037] Figure 14 This is a structural schematic diagram of an oxygen mask PSU panel lock with a stable locking function in an open state according to the present invention;

[0038] Figure 15 for Figure 14 A schematic diagram of the enlarged structure at position I in the middle;

[0039] Figure 16 for Figure 14 Schematic diagram of the enlarged structure at J in the middle;

[0040] Figure 17 for Figure 14 The main view;

[0041] Figure 18 for Figure 17 Schematic diagram of the enlarged structure at K in the middle.

[0042] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0043] 1. Oxygen mask box body; 2. PSU baffle; 3. First through hole; 4. Second through hole; 5. Base; 6. Armature; 7. Ratchet; 8. Rotating shaft; 9. First spring; 10. Limit seat; 11. Rack; 12. Strip plate; 13. Connecting block; 14. Clamping plate; 15. Second spring; 16. Fixed plate; 17. Connecting plate; 18. Connecting rope; 19. Bistable electromagnet; 20. First gear; 21. Ratchet; 22. Support shaft; 23. Spring retaining ring; 24. Third spring; 25. Second gear; 26. Rotating rod; 27. Slide groove; 28. Spring sleeve; 29. ​​Clamping groove; 30. Circular groove; 31. Pulley; 32. Fixed block. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0046] See also Figures 1-18As shown, the present invention is an oxygen mask PSU panel lock with a stable locking function, comprising an oxygen mask box body 1, a PSU baffle 2 is movably mounted on the bottom of the oxygen mask box body 1 through a hinge, a first through-hole 3 is penetrated through the surface of the PSU baffle 2, a base 5 is fixed to the outer wall of the oxygen mask box body 1, a rotating shaft 8 is rotatably provided on the base 5, an armature 6 is fixed on the rotating shaft 8, a support shaft 22 is rotatably provided on one side of the base 5, a ratchet mechanism is provided between the support shaft 22 and the armature 6, a slide groove 27 is provided on the front side of the base 5, a gear mechanism is provided between the slide groove 27 and the support shaft 22, and a snap-fit ​​structure is provided at the bottom of the gear mechanism, which cooperates with the first through-hole 3.

[0047] The gear mechanism includes a rack 11, which is movably arranged inside the slide groove 27. A first gear 20 is provided on the front side of the surface of the support shaft 22, and the first gear 20 is engaged with the rack 11. A rotating rod 26 is provided on one side of the rack 11, and the rotating rod 26 is rotatably connected to the base 5. A second gear 25 is provided on the rotating rod 26, and the second gear 25 is provided on the lower side of the first gear 20, and the second gear 25 is engaged with the rack 11.

[0048] The buckle structure includes a limit seat 10, which is fixed to the top of the rack 11, and the limit seat 10 is an L-shaped structure. The transverse part of the limit seat 10 cooperates with the base 5 to effectively limit the downward movement distance of the rack 11 and prevent the rack 11 from sliding out of the slide groove 27. A fixing block 32 is fixed on the base 5, and a first spring 9 is connected between the top of the limit seat 10 and the fixing block 32. A strip plate 12 is fixed to the bottom of the rack 11, and a connecting block 13 is fixed to the bottom of the strip plate 12 through a connecting rod. Two fixing plates 16 are relatively fixed on one side of the connecting block 13, and a connecting plate 17 is rotatably provided between the two fixing plates 16. The movable end of the connecting plate 17 is fixed with a card plate 14, and a second spring 15 is connected between the card plate 14 and the connecting block 13, and the card plate 14 and the connecting block 13 both cooperate with the first through hole 3, and two connecting ropes 18 are fixed between the rotating rod 26 and the card plate 14.

[0049] In the above structure, the meshing action of the rack 11 and the second gear 25 drives the second gear 25 to rotate, and then drives the rotating rod 26 to rotate synchronously, thereby achieving the purpose of winding and releasing the connecting rope 18. Combined with the rotation cooperation of the connecting plate 17 and the fixed plate 16, the clamping plate 14 is driven to move, thereby achieving the effect of limiting and fixing the PSU baffle 2 and releasing it to open.

[0050] A bistable electromagnet 19 is provided on a side of the first gear 20 away from the rack 11 . The bistable electromagnet 19 is mounted on the base 5 , and the bistable electromagnet 19 cooperates with the armature 6 .

[0051] The ratchet mechanism includes a pawl 7 and a ratchet 21. The pawl 7 is welded and fixed to the inner side of the armature 6. The ratchet 21 is arranged on the rear side of the first gear 20, and the ratchet 21 is sleeved on the support shaft 22. The pawl 7 and the ratchet 21 cooperate with each other. Two slots 29 are provided on the support shaft 22. A spring retaining ring 23 is provided in the slot 29. The two spring retaining rings 23 cooperate with the first gear 20 and the front surface of the ratchet 21 respectively.

[0052] A spring sleeve 28 is provided on one side of the bistable electromagnet 19 , and a third spring 24 is provided inside the spring sleeve 28 . The upper end of the third spring 24 cooperates with the armature 6 .

[0053] Two pulleys 31 are provided on the front and rear surfaces of the strip plate 12. The connecting rope 18 passes between the two adjacent pulleys 31. The pulley 31 is rotationally connected to the strip plate 12. The pulley 31 effectively limits and guides the connecting rope 18, ensuring the use effect of the connecting rope 18 and the stability of the winding and releasing process of the connecting rope 18.

[0054] A second through hole 4 is passed through the PSU baffle 2, and a circular groove 30 is provided at the bottom of the movable end of the armature 6. The second through hole 4 and the circular groove 30 cooperate with each other. The second through hole 4 makes it convenient for the staff to use a sharp object to squeeze the circular groove 30, push the armature 6 upward, and manually open the oxygen mask PSU panel lock.

[0055] A telescopic rod is provided inside the first spring 9 , and the upper and lower ends of the telescopic rod are fixedly connected to the limit seat 10 and the fixing block 32 respectively, thereby ensuring the stability and use effect of the first spring 9 .

[0056] Example:

[0057] like Figures 1-12 As shown, in the initial state, the PSU baffle 2 is in a locked closed position, the bistable electromagnet 19 is not energized, the armature 6 is stable at the end position of the bistable electromagnet 19, and the second through hole 4 and the circular groove 30 are on the same axis.

[0058] like Figures 14-18 As shown, when the oxygen mask needs to be used, the bistable electromagnet 19 is energized through the external control terminal, releasing the armature 6. Under the elastic force of the third spring 24, the right part of the armature 6 is pushed upward. Combined with the action of the rotating shaft 8, the armature 6 rotates around the rotating shaft 8, thereby driving the pawl 7 to disengage from the ratchet 21. At this time, the ratchet 21 is no longer restricted, and the first gear 20 is no longer restricted and can rotate freely. Under the meshing action of the first gear 20 and the rack 11, the restriction on the rack 11 is eliminated.

[0059] At this time, the rack 11 moves downward along the direction of the slide groove 27 under the action of its own weight and the elastic force of the first spring 9 on its top, driving the second gear 25 on the lower side to rotate counterclockwise, and then driving the rotating rod 26 to rotate synchronously, combined with the pulley 31, to stably reel up the connecting rope 18, and under the rotation cooperation of the connecting plate 17 and the fixed plate 16, the card plate 14 is pulled to rotate in the direction close to the connecting block 13, and the second spring 15 is compressed until the movable end of the card plate 14 is separated from the bottom surface of the PSU baffle 2, releasing the restriction on the PSU baffle 2, combined with the first through hole 3, the hinge action between the PSU baffle 2 and the oxygen mask box body 1, the weight of the PSU baffle 2 itself, and the weight of the oxygen mask inside the oxygen mask box body 1, so that the PSU baffle 2 opens downward, and the internal oxygen mask falls downward, making it convenient for passengers to use;

[0060] When the rack 11 moves downward, the buckle structure is driven to move downward synchronously, so that the PSU baffle 2 is released at a certain angle. When the clamping plate 14 is pulled and rotated toward the connecting block 13, the PSU baffle 2 can be lifted up at a certain angle, making it easier to open the PSU baffle 2.

[0061] The staff or passengers can use a sharp object to pass through the second through hole 4, squeeze the circular groove 30, and push the armature 6 upward to manually open the oxygen mask PSU panel lock, which is suitable for different usage situations.

[0062] After use, the staff puts the oxygen mask back into the oxygen mask box body 1, and pushes the PSU baffle 2 and the rack 11 upwards, driving the buckle structure to pass through the first through hole 3. Under the elastic action of the second spring 15, the movable end of the clamping plate 14 is squeezed outward until the movable end of the clamping plate 14 abuts against the bottom of the PSU baffle 2, thereby limiting the position of the PSU baffle 2;

[0063] Secondly, the power to the bistable electromagnet 19 is cut off, the armature 6 returns to its initial position and stabilizes at the end position of the bistable electromagnet 19, and the third spring 24 is compressed into the inside of the spring sleeve 28 through the armature 6, and the pawl 7 is driven to engage in the ratchet groove corresponding to the ratchet 21, and the ratchet 21 is limited by the pawl 7 to prevent the support shaft 22 from rotating freely, thereby achieving the purpose of limiting the first gear 20, the rack 11 and the second gear 25, achieving the purpose of restoring to the initial state, ensuring the stability of the card plate 14, and then achieving the purpose of limiting and locking the PSU baffle 2.

[0064] Compared with the traditional PSU panel lock, the present invention realizes the locking, fixing and opening of the PSU baffle 2 through the mutual cooperation of the ratchet mechanism, the gear mechanism and the snap structure. The ratchet mechanism has the functions of anti-reversal and intermittent movement, which can well ensure that the PSU panel lock will not loosen. It is simple to operate, can overcome the strong turbulence during the flight, is safe and stable, energy-saving and environmentally friendly, and is more suitable for the current aviation market needs.

[0065] It should be further explained that the installation structure, connection method or setting method of each component in the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects.

[0066] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0067] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An oxygen mask PSU panel lock with a stable locking function, comprising an oxygen mask box body (1), a PSU baffle (2) being movably mounted on the bottom of the oxygen mask box body (1) via a hinge, characterized in that: A first through hole (3) is passed through the surface of the PSU baffle (2), a base (5) is fixed to the outer wall of the oxygen mask box body (1), a rotating shaft (8) is rotatably provided on the base (5), an armature (6) is fixed on the rotating shaft (8), a support shaft (22) is rotatably provided on one side of the interior of the base (5), a ratchet mechanism is provided between the support shaft (22) and the armature (6), a slide groove (27) is provided on the front side of the interior of the base (5), a gear mechanism is provided between the slide groove (27) and the support shaft (22), and a snap-fit ​​structure is provided at the bottom of the gear mechanism to cooperate with the first through hole (3); The gear mechanism includes a rack (11), the rack (11) is movably arranged inside the slide groove (27), a first gear (20) is arranged on the front side of the surface of the support shaft (22), the first gear (20) is meshed with the rack (11), a rotating rod (26) is arranged on one side of the rack (11), the rotating rod (26) is rotatably connected to the base (5), a second gear (25) is arranged on the rotating rod (26), the second gear (25) is arranged on the lower side of the first gear (20), and the second gear (25) is meshed with the rack (11); The buckle structure includes a limit seat (10), the limit seat (10) is fixed on the top of the rack (11), and the limit seat (10) is an L-shaped structure, the transverse part of the limit seat (10) cooperates with the base (5), a fixed block (32) is fixed on the base (5), a first spring (9) is connected between the top of the limit seat (10) and the fixed block (32), a strip plate (12) is fixed to the bottom of the rack (11), a connecting block (13) is fixed to the bottom of the strip plate (12) through a connecting rod, two fixed plates (16) are relatively fixed on one side of the connecting block (13), a connecting plate (17) is rotatably arranged between the two fixed plates (16), a card plate (14) is fixed to the movable end of the connecting plate (17), a second spring (15) is connected between the card plate (14) and the connecting block (13), and the card plate (14) and the connecting block (13) are both connected to the first through hole (3) cooperate with each other, two connecting ropes (18) are fixed between the rotating rod (26) and the clamping plate (14), a bistable electromagnet (19) is provided on the side of the first gear (20) away from the rack (11), the bistable electromagnet (19) is installed on the base (5), and the bistable electromagnet (19) cooperates with the armature (6), the ratchet mechanism includes a pawl (7) and a ratchet (21), the pawl (7) is welded and fixed On the inner side of the armature (6), the ratchet (21) is arranged on the rear side of the first gear (20), and the ratchet (21) is sleeved on the support shaft (22). The pawl (7) and the ratchet (21) cooperate with each other. Two slots (29) are provided on the support shaft (22). Spring retaining rings (23) are provided in the slots (29). The two spring retaining rings (23) respectively cooperate with the first gear (20) and the front side surface of the ratchet (21).

2. The oxygen mask PSU panel lock with stable locking function according to claim 1 is characterized in that: A spring sleeve (28) is provided on one side of the bistable electromagnet (19), a third spring (24) is provided inside the spring sleeve (28), and the upper end of the third spring (24) is matched with the armature (6).

3. The oxygen mask PSU panel lock with stable locking function according to claim 2, characterized in that: Two pulleys (31) are provided on both the front and rear surfaces of the strip plate (12), the connecting rope (18) passes between two adjacent pulleys (31), and the pulleys (31) are rotatably connected to the strip plate (12).

4. The oxygen mask PSU panel lock with stable locking function according to claim 3 is characterized in that: A second through hole (4) is passed through the PSU baffle (2), a circular groove (30) is provided at the bottom of the movable end of the armature (6), and the second through hole (4) and the circular groove (30) cooperate with each other.

5. The oxygen mask PSU panel lock with stable locking function according to claim 4, characterized in that: A telescopic rod is provided inside the first spring (9), and the upper and lower ends of the telescopic rod are fixedly connected to the limiting seat (10) and the fixing block (32) respectively.

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