Quick-change blade assembly system

Abstract

A blade assembly comprising: a holder assembly connectable to a hairdressing appliance; and, a holder assembly connectable to the stationary clipper blade, the holder assembly detachably connected to the bracket assembly; the support assembly comprises a blade support capable of being connected with a hairdressing tool; and a locking lever connected to the blade holder by a rotatable fastener such that the locking lever is rotatable relative to the blade holder.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention

[0001] The present disclosure relates to hair cutting appliances. In particular, the present disclosure relates to a blade assembly for replacing blades of a hair cutting appliance. 2. Description of the Related Art

[0002] There are various hair cutting appliances on the market, such as hair clippers or trimmer clippers, for trimming scalp hair and / or facial hair. Common styles of hair cutting appliances have an adjustable taper controller. A stationary cutting blade and a movable cutting blade move relative to each other on a bracket, and the bracket is controlled by a tapered lever arm to slide in and out. This is a fine-tuning device for controlling the length of the trimmed hair. The stationary blade is threadedly connected to the sliding bracket. Users typically adjust the tapered arm to the closest position and then loosen two screws, creating space to adjust the blade as close as possible to the movable blade so that the trimmer can trim as close as possible at this position. This is commonly referred to as a zero-gap blade. Additionally, some blades have different geometries, and the trimming length changes as the taper controller slides up and down. Currently, when users want to replace the blade, they have to unexpectedly unscrew the blade, replace it with a replacement blade, and then readjust the blade to zero-gap.

[0003] Accordingly, the present disclosure has determined that there is a continuing need for a device that can overcome, mitigate, and / or alleviate one or more of the above and other detrimental effects of existing devices. SUMMARY OF THE INVENTION

[0004] The blade assembly of the present disclosure allows for quick replacement of the blade on a hair cutting appliance and maintains zero-gap adjustment on the same hair cutting appliance. It is also designed to be retrofitted onto existing models or used on new hair cutting appliances.

[0005] A blade assembly is provided that includes a bracket assembly connectable to a hair cutting appliance and a retainer assembly connectable to a stationary trimmer blade, wherein the retainer assembly is detachably connected to the bracket assembly.

[0006] Those skilled in the art will understand and appreciate the above and other features and advantages of the present disclosure from the following detailed description, the drawings, and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Is a bottom perspective view of a blade assembly according to the present disclosure, the blade assembly having a retainer assembly connected to a bracket assembly.

[0008] Figure 2 Is Figure 1 A bottom perspective view of the blade assembly of, wherein the retainer assembly is disconnected from the bracket assembly.

[0009] Figure 3For Figure 1 Top perspective view of the blade holder of the retainer assembly of

[0010] Figure 4 For Figure 1 Bottom perspective view of the retainer assembly of

[0011] Figure 5 Top perspective exploded view of the retainer assembly and the assembly tool.

[0012] Figure 6 For Figure 1 Top perspective view of the bracket assembly of , where the locking lever is in the connected position.

[0013] Figure 7 For Figure 1 Top perspective view of the bracket assembly of , where the locking lever is in the disconnected position.

[0014] Figure 8 For Figure 1 Partial top perspective view of the blade assembly of , which is connected to the hair cutting appliance, its retainer assembly has been disconnected from the bracket assembly, and the tapered arm of the hair cutting appliance is shown adjusted to the near - cutting position.

[0015] Figure 9 For Figure 1 Top perspective view of the bracket assembly connected to the hair cutting appliance of , where parts have been removed, showing the locking lever in the connected position and the disconnected position, and the position of the bracket assembly when the tapered arm of the hair cutting appliance is adjusted to the longest cutting position.

[0016] Figure 10 For Figure 1 Bottom perspective view of the bracket assembly connected to the hair cutting appliance of , where parts have been removed, showing the locking lever in the connected position and the disconnected position, and the tapered arm of the hair cutting appliance is shown adjusted to the longest cutting position.

[0017] Figure 11 For Figure 1 Partial top perspective view of the blade assembly connected to the hair cutting appliance of , the retainer assembly is connected to the bracket assembly, a part of the fixed clipper blade is cut away, and the tapered arm of the hair cutting appliance is shown adjusted to the near - cutting position.

[0018] Figure 12 For Figure 1 Partial top perspective view of the blade assembly connected to the hair cutting appliance of , the retainer assembly is connected to the bracket assembly, and the tapered arm of the hair cutting appliance is shown adjusted to the near - cutting position.

[0019] Figure 13 For Figure 1Perspective view of a partial top of a hair cutting appliance with the blade assembly attached, the retainer assembly being disconnected from the bracket assembly, the retainer assembly having a blade holder modified to include a protrusion, and the tapered arm of the hair cutting appliance being shown adjusted to the longest cutting position.

[0020] Figure 14 For Figure 13 Perspective view of a partial top of a hair cutting appliance with the blade assembly attached, the retainer assembly being connected to the bracket assembly, where a portion of the stationary clipper blade is cut away, and the tapered arm of the hair cutting appliance being adjusted to the nearest cutting position. Detailed description

[0021] Referring to the drawings, and particularly to Figure 1 which shows an exemplary embodiment of a blade assembly according to the present disclosure, the blade assembly generally being designated by reference numeral 10. Advantageously, the blade assembly 10 allows for quick replacement of the stationary clipper blade for a hair cutting appliance (e.g., a hair clipper or a trimmer) and maintains a zero-gap adjustment on the same hair cutting appliance. The blade assembly 10 is also designed for retrofitting existing models or for use on new hair cutting appliances.

[0022] Referring to Figure 2 the blade assembly 10 has a retainer assembly 12 and a bracket assembly 14. The retainer assembly 12 has a stationary clipper blade 15, a blade holder 16, a first fastener 18, and a second fastener 20.

[0023] Referring to Figure 5 the stationary clipper blade 15 is a blade having a blade body 22 with a blade 23 extending from the blade body 22 and openings 24, 26. For example, the stationary clipper blade 15 can be a conventional stationary clipper blade.

[0024] Referring to Figure 3 the blade holder 16 has a holder body 28. The blade holder 16 has openings 30, 32 which are, for example, threaded holes passing through the holder body 28 and are positioned to align with the openings 24, 26 of the stationary clipper blade 15 for receiving the first fastener 18 and the second fastener 20. The blade holder 16 has a recess 34 in the holder body 28 which forms a cam 36. The thickness of the cam 36 can increase from a first side 38 to a second side 40 to form a ramp. The cam 36 has a notch 37.

[0025] Returning to Figure 5 the first fastener 18 and the second fastener 20 are, for example, both screws. Referring to Figure 4, during assembly, the first fastener 18 passes through the opening 24 of the fixed clipper blade 15 and the opening 32 of the blade holder 16, and the second fastener 20 passes through the opening 26 of the fixed clipper blade 15 and the opening 30 of the blade holder 16, thereby fixing the fixed clipper blade 15 to the blade holder 16.

[0026] See Figure 5 , an assembly tool 500 can be selectively used to assemble the fixed clipper blade 15 to the blade holder 16 by the first fastener 18 and the second fastener 20. For example, the assembly tool 500 can hold the blade holder 16 while positioning the fixed clipper blade 15 above the blade holder 16 such that the first fastener 18 can be inserted into the opening 24 of the fixed clipper blade 15 and the opening 32 of the blade holder 16, and the second fastener 20 can be inserted through the opening 26 of the fixed clipper blade 15 and the opening 30 of the blade holder 16, thereby fixing the fixed clipper blade 15 to the blade holder 16.

[0027] Return to see Figure 2 , the bracket assembly 14 has a blade bracket 50, a locking lever 52, and a rotatable fastener 54. The blade bracket 50 has a bracket body 51. The bracket assembly 14 has a cutout portion 55 that passes through the bracket body 51 of the blade bracket 50 and is shaped to receive the blade holder 16. The bracket body 51 is bent to form an intermediate member 56 and side members 58, 60 on both sides of the intermediate member 56, and the side members 58, 60 each form a free end. The free end of the side member 58 has a ridge 62, and the free end of the side member 60 has a ridge 64. The ridges 62, 64 are bent inwardly towards each other. The intermediate member 56 has an opening 57 adjacent to the cutout portion 55 ( Figure 6 ). The side member 58 has an opening 63. The bracket body 51 can have different shapes while still forming the cutout portion 55. The locking lever 52 has a locking lever arm 66 connected to a locking lever projection 68. The locking lever arm 66 has a free end 67 opposite to the locking lever projection 68. The free end 67 is bent to form a fold 69. The locking lever 52 has an opening through the locking lever arm 66. The rotatable fastener 54 is, for example, a rivet. The rotatable fastener 54 passes through the opening of the locking lever arm 66 and the opening 57 of the blade bracket 50, rotatably connecting the locking lever 52 to the blade bracket 50, thereby forming a pivot point for the lever arm 52. The locking lever 52 is rotatable relative to the blade bracket 50 (as shown by arrow 600) between a connected position (as Figure 6 shown) and a disconnected position (as Figure 7 shown), in the connected position, a part of the locking lever projection 68 extends to overlap with the cutout portion 55, in the disconnected position, the locking lever projection 68 does not overlap with the cutout portion 55 and is located outside the cutout portion 55. As Figure 1 andFigure 6 As shown, when the locking lever 52 is in the connected position, the folded portion 69 of the locking lever arm 66 abuts against the blade holder 50 to limit further movement of the locking lever 52.

[0028] The blade assembly 10 can be connected to a hair cutting appliance, such as a hair clipper or a trimmer having an adjustable taper controller, which can move a stationary cutting blade relative to a movable cutting blade as a fine adjustment device for controlling the length of the hair cut.

[0029] See Figure 8 , the bracket assembly 14 is connected to a hair cutting appliance 800, which is a trimmer. The hair cutting appliance 800 has a blade driver 802 in a housing 804. The blade driver 802 is connected to the movable blade 805 so that during use, the movable blade 805 reciprocates left and right in the direction shown by the arrow 807, while the stationary trimmer blade 15 remains in a fixed position. The movable blade 805 has a blade 815. The hair cutting appliance 800 has an adjustable taper controller taper arm 806 ("taper arm 806"). The taper arm 806 can move between a longest cutting position (as Figure 13 shown) and a near cutting position (as Figure 8 shown), as shown by the arrow 1100.

[0030] The bracket assembly 14 can be connected to the hair cutting appliance 800, for example, by a first plate 200 and a second plate 202 connected to the housing 804 of the hair cutting appliance 800. The first plate 200 has a groove or track 201, and the second plate 202 has a groove or track 204 ( Figure 13 ). The first plate 200 can be connected to the housing 804 by a screw or shaft that is connected to the taper arm 806, which passes through an opening 819 in the first plate 200 and an opening in the housing 804. The second plate 202 can be connected to the housing 804 by a screw 206 ( Figure 13 ), which passes through an opening in the second plate 202 and an opening in the housing 804 that is located on the side of the housing 804 opposite the taper arm 806. As Figure 13As shown, to connect the bracket assembly 14 to the hair cutting appliance 800, the tapered arm 806 is disconnected from the hair cutting appliance 800 by disconnecting the connection of the screw that connects the tapered arm 806 to the housing 804 and / or disconnecting the connection to the shaft of the tapered arm 806. Then, the ridge 64 of the blade holder 50 slides in the track 204 of the second plate 202, and the ridge 62 of the blade holder 50 slides in the track 201 of the first plate 200. Then, screws pass through the tapered arm 806, the opening 63 of the blade holder 50, the opening 819 of the first plate 200, and the housing 804 and / or the shaft to connect the blade holder 50 and the tapered arm 806 to the hair cutting appliance 800 to hold the bracket assembly 14 on the hair cutting appliance 800. Return to see Figure 8 , the side members 58, 60 of the blade holder 50 are sized to leave a space between the blade holder 50 and the hair cutting appliance 800 so that the blade holder 16, the rotatable fastener 54, and the locking lever arm 66 can be installed.

[0031] Alternatively, the blade holder 50 can have a different shape while still forming the cutout portion 55 so that the blade holder 50 can be connected to the hair cutting appliance, for example, by screws, adhesives, welding, or any other connection means.

[0032] See Figure 2 and Figure 8 , when the bracket assembly 14 is connected to the hair cutting appliance 800, the holder assembly 12 can be detachably connected to the bracket assembly 14 by positioning the blade holder 16, where the blade holder 16 is connected to the fixed clipper blade 15 through the cutout portion 55 of the blade holder 50 while the locking lever 52 is in the disconnected position, as Figure 7 shown, the locking lever protrusion 68 does not overlap with the cutout portion 55 and is located outside the cutout portion 55. When the locking lever 52 is in the disconnected position, the notch 37 allows the blade holder 16 to pass through the cutout portion 55. After the blade holder 16 is positioned through the cutout portion 55 of the blade holder 50, the locking lever 52 can be rotated relative to the blade holder 50 from the disconnected position to the connected position, as Figure 1 , Figure 6 , Figure 11 and Figure 12As shown, the act of rotating the locking lever 52 from the disconnected position to the connected position causes the rod protrusion 68 to engage with the inclined surface of the cam 36 of the blade holder 16, thereby positioning the fixed clipper blade 15 in place and pulling the fixed clipper blade 15 downward to closely adhere it to the blade holder 50. Thus, the fixed clipper blade 15 is locked in place, and the deflection on the back surface of the blade holder 50 provides the tension to lock the fixed clipper blade 15 in place. When the holder assembly 12 is connected to the bracket assembly 14, the locking lever protrusion 68 is located in the cam 36, between the blade holder 16 and the fixed clipper blade 15, to maintain the connection between the holder assembly 12 and the bracket assembly 14. Therefore, the fixed clipper blade 15 can be quickly assembled to the hair cutting appliance 800 without using tools.

[0033] When the fixed clipper blade 15 is connected to the hair cutting appliance 800, it can move relative to the movable blade 805 on the blade holder 50, and the movable blade 805 can slide between the longest cutting position (as Figure 9 and Figure 13 shown) and the near cutting position (as Figure 11 shown) and is controlled by the tapered arm 806. When the fixed clipper blade 15 moves between the longest cutting position and the near cutting position, the ridge 64 of the blade holder 50 slides in the track 204 of the second plate 202, and the ridge 62 of the blade holder 50 slides in the track of the first plate 200. At the longest cutting position, the tapered arm 806 is positioned upward relative to the near cutting position (as Figure 13 shown), and the tapered arm 806 moves downward relative to the longest cutting position to the near cutting position (as Figure 11 shown) to move the fixed clipper blade 15 from the longest cutting position to the near cutting position. To move the fixed clipper blade 15 from the near cutting position to the longest cutting position, the tapered arm 806 moves upward relative to the near cutting position.

[0034] See Figure 11 and Figure 12, with the conical arm 806 adjusted to the nearest cutting position and the locking lever 52 in the connected position, the user can loosen the first fastener 18 to adjust the first fastener 18 passing through the opening 24 of the fixed clipper blade 15 and / or the opening 32 of the blade holder 16, and the user can loosen the second fastener 20 to adjust the second fastener 20 passing through the opening 26 of the fixed clipper blade 15 and / or the opening 30 of the blade holder 16. The openings 24, 26, 30, and / or 32 are sized to allow either the first fastener 18 or the second fastener 20 to move therein to adjust the fixed clipper blade 15 as close as possible to the movable blade 805, so that the hair cutting appliance 800 trims as close as possible (e.g., as close as possible to the user's skin) in this position. If desired, the first fastener 18 and the second fastener 20 can be re-fastened to their desired positions through the openings 24, 26, 30, and / or 32 after adjustment. This is commonly referred to as a zero-clearance blade. Once the fixed clipper blade 15 has been connected to the hair cutting appliance 800 once and a zero clearance has been achieved, the fixed clipper blade 15 can be removed from the blade holder 50 and then reconnected to the blade holder 50 that is still connected to the hair cutting appliance 800 without readjusting the zero clearance again.

[0035] The conical arm 806 can be removed with a screw. Once the conical arm 806 is removed, the blade holder 50 can be slipped off the back of the hair cutting appliance 800. This makes it easy to retrofit the blade assembly 10 onto an existing hair cutting appliance.

[0036] See Figure 13 , the blade holder 50 can be modified to a blade holder 50a, which is the same as the blade holder 50 except that the blade holder 50a has a protrusion 1100 that extends from a side of the blade holder 50a opposite to the side where the blade holder 50a is connected to the locking lever 52. Adjust the conical arm 806 to the longest cutting position (upward), as Figure 13As shown, the protrusion 1100 restricts the upward movement of the movable blade 805, and advantageously, the protrusion 1100 will interact with the blade driver 802 to restrict the upward movement of the movable cutting blade 805. Therefore, when the fixed cutting blade 15 is removed, it is easier to reassemble the fixed cutting blade 15 or a replacement fixed cutting blade onto the blade holder 50. Additionally, advantageously, the position of the movable cutting blade 805 is restricted by the movement of the blade holder 50a, so that when the fixed cutting blade 15 is assembled, the blade driver 802 does not contact the protrusion 1100 that restricts the upward movement of the movable cutting blade 805. The movable cutting blade 805 has protrusions 809, 811 on the side opposite to the blade side 812. The protrusion 1100 is located between the protrusions 809, 811, such that the protrusion 1100 can also restrict the left - right movement of the movable cutting blade 805 in the direction shown by the arrow 807.

[0037] Advantageously, the blade retainer 16 can be attached to a user - selected fixed blade (e.g., the fixed clipper blade 15), and / or multiple blade retainers 16 can be respectively attached to one of a plurality of user - selected fixed blades, so that the bracket assembly 14 can be held firmly to the hair - cutting appliance 800 and the fixed clipper blade can be quickly disassembled and replaced.

[0038] Therefore, the blade assembly 10 provides a quick - change blade holder, namely the bracket assembly 14, for a common type of hair - cutting appliance, which has an adjustable taper controller for moving the fixed cutting blade relative to the movable cutting blade on the bracket, and the bracket slides in and out under the control of the taper lever arm. The blade retainer with a cam (i.e., the blade retainer 16) can be attached to a user - selected blade, such as the fixed clipper blade 15, and the blade retainer (i.e., the blade retainer 16) can be inserted into a notch (i.e., the notch portion 55) in the sliding blade holder (i.e., the blade holder 50), where the locking lever arm (i.e., the locking lever 52) is in the right - hand position, as Figure 8 shown, and then by moving the locking lever (i.e., the locking lever 52) to the left - hand position, as Figure 11As shown, the locking to the clipper, the inclined plane of the engaging blade holder cam (i.e., cam 36) positions the fixed clipper blade in place and pulls it downward to hold it tightly against the sliding blade holder (i.e., blade holder 50), so that the fixed clipper blade is locked in place, and the deflection on the back of the sliding blade holder (i.e., blade holder 50) provides the tension to lock the fixed clipper blade in place. Similarly, as described herein, when the tapered arm (i.e., tapered arm 806) is adjusted to the nearest position and the locking lever arm (i.e., locking lever 52) is in the locked position, the user can loosen the blade screw and adjust the two screws (i.e., the first fastener 18 and the second fastener 20), which have space to adjust the fixed clipper blade as close as possible to the movable blade, so that the clipper can trim as closely as possible in this position, which is generally referred to as zero blade clearance. The fixed clipper blade can be disassembled and replaced without readjusting the zero clearance. Another advantage described herein is that the clipper tapered arm (i.e., tapered arm 806) can be disassembled using one screw, and once disassembled, the sliding blade holder (i.e., blade holder 50) can be slid out from the back of the clipper, so that the quick-change holder can be easily retrofitted to the existing device.

[0039] It should also be noted that terms such as "first", "second", "third", "upper", "lower", etc. may be used herein as modifiers to modify various elements. Unless otherwise specified, these modifiers do not imply a spatial order, sequence, or hierarchical order of the modified elements. In addition, the term "attached" may also mean connected.

[0040] Although the present disclosure has been described with reference to one or more exemplary embodiments, those skilled in the art should understand that various changes can be made without departing from the scope of the present disclosure, and elements thereof can be replaced with equivalents. In addition, various modifications can be made without departing from the scope of the present disclosure to adapt to a particular situation or material. Therefore, the present disclosure is not limited to the specific embodiments disclosed as the best mode, but covers all embodiments falling within the scope of the appended claims.

Claims

1. A blade assembly, comprising: A bracket assembly capable of being connected to a hair cutting appliance; And A retainer assembly capable of being connected to a stationary clipper blade, and the retainer assembly being detachably connected to the bracket assembly.

2. The blade assembly according to claim 1, wherein, The stationary clipper blade can be adjusted to a position relative to the movable blade, then the retainer assembly can be disconnected from the bracket assembly and then reconnected to the bracket assembly. When the retainer assembly is connected to the bracket assembly, the stationary clipper blade is positioned at the same position relative to the movable blade.

3. The blade assembly according to claim 1, wherein, The bracket assembly has a blade retainer, and the blade retainer has a retainer body and a recess forming a cam in the retainer body.

4. The blade assembly according to claim 3, wherein, The blade retainer is detachably connected to the stationary clipper blade.

5. The blade assembly according to claim 3, wherein, The bracket assembly has a blade bracket, and the blade bracket is connected to a locking lever by a rotatable fastener such that the locking lever can rotate relative to the blade bracket.

6. The blade assembly according to claim 5, wherein, The bracket assembly has a cutout portion passing through the bracket body, and the cutout portion is shaped to receive the blade retainer of the bracket assembly.

7. The blade assembly according to claim 6, wherein, The bracket body is bent on opposite sides of an intermediate member to form a first side member and a second side member, and both the first side member and the second side member form free ends.

8. The blade assembly according to claim 7, wherein, The free end of the first side member has a first ridge, and the free end of the second side member has a second ridge, and the first ridge and the second ridge extend inwardly towards each other.

9. The blade assembly according to claim 6, wherein, The locking lever has a locking lever arm connected to a locking lever protrusion such that the locking lever can rotate between a connected position and a disconnected position relative to the blade bracket. In the connected position, a part of the locking lever protrusion extends to overlap with the cutout portion, and in the disconnected position, the locking lever protrusion does not overlap with the cutout portion and is located outside the cutout portion.

10. The blade assembly according to claim 8, wherein, To connect the bracket assembly to the hair cutting appliance, the tapered arm is disconnected from the hair cutting appliance, then the first ridge slides in a first track of a first plate connected to the hair cutting appliance, the second ridge slides in a second track of a second plate connected to the hair cutting appliance, and then a screw passes through the tapered arm, an opening of the blade bracket, an opening of the first plate, and the hair cutting appliance to hold the bracket assembly on the hair cutting appliance.

11. The blade assembly according to claim 5, wherein, The blade bracket is connected to the hair cutting appliance by a connection method selected from the group consisting of screws, adhesives, welding, and any combination thereof.

12. The blade assembly according to claim 9, wherein, When the locking lever is in the disconnected position, the retainer assembly is connected to the bracket assembly by positioning the blade retainer, the blade retainer is connected to the stationary clipper blade through the cutout portion of the blade bracket, and then the locking lever rotates from the disconnected position to the connected position such that the rod protrusion engages with an inclined surface of the cam of the blade retainer, and the locking lever protrusion is positioned in the cam and thus between the blade retainer and the stationary clipper blade.

13. The blade assembly according to claim 12, wherein, The locking lever rotates from the disconnected position to the connected position to pull the fixed clipper blade downward so that it is held tightly against the blade holder, thereby locking the fixed clipper blade in place, and the deflection on the back of the blade holder provides the tension to lock the fixed clipper blade in place.

14. The blade assembly according to claim 1, wherein, The fixed clipper blade can move on the blade holder of the bracket assembly relative to the movable blade of the hair cutting appliance. When connected to the hair cutting appliance, the movable blade is controlled by the tapered arm of the hair cutting appliance to slide between the longest cutting position and the near cutting position.

15. The blade assembly according to claim 14, wherein, When the tapered arm is adjusted to the near cutting position and the locking lever of the bracket assembly is in the connected position, the first fastener can be loosened to adjust the first fastener passing through the first opening of the fixed clipper blade and / or the opening of the blade holder of the bracket assembly, and the second fastener can be loosened to adjust the position of the fixed clipper blade relative to the movable blade.

16. The blade assembly according to claim 1, wherein, When connected to the hair cutting appliance, the tapered arm of the hair cutting appliance is removed, and the blade holder of the bracket assembly can slip off the hair cutting appliance.

17. The blade assembly according to claim 5, wherein, The blade holder has a protrusion that extends from a side of the blade holder opposite to the side where the blade holder is connected to the locking lever, and when the tapered arm of the hair cutting appliance is adjusted to the longest cutting position, the protrusion restricts the upward movement of the movable blade of the hair cutting appliance.

18. The blade assembly according to claim 1, wherein, The fixed clipper blade is a plurality of fixed clipper blades, and the holder assembly is a plurality of holder assemblies, each holder assembly having one of the plurality of fixed clipper blades, such that when each of the plurality of holder assemblies can be connected to and detached from the bracket assembly, the bracket assembly remains fastened to the hair cutting appliance.

19. A bracket assembly, comprising: A blade holder that can be connected to a hair cutting appliance; And A locking lever that is connected to the blade holder by a rotatable fastener so that the locking lever can rotate relative to the blade holder.

20. A holder assembly, comprising: A blade holder having a holder body and a recess forming a cam within the holder body, the blade holder can be connected to a fixed clipper blade, the blade holder can be detachably connected to a bracket assembly, and the bracket assembly can be detachably connected to a hair cutting appliance.

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