Upper and lower back toothbrush

Abstract

To provide a toothbrush for brushing the backs of upper and lower teeth, which can easily and reliably brush the backs of the upper and lower teeth. [Solution] A toothbrush body comprising a handle with a grip at the rear and a brush with multiple bristle bundles. When the handle is held upright, the handle has a rotating section at its upper tip that incorporates a round rod-shaped rotating body, and the rotating section has a dial section on its back surface that is directly connected to the rotating body, and the rotating section has an arm section on its surface opposite the dial that is integral with the rotating body and is horizontal, round rod-shaped, or strip-shaped, and about 3 cm long, at a right angle to the upright handle, and the arm section has a front arm that is bent at a right angle upwards at its tip and extends about 1 cm in a vertical position, and the front arm has a wide rectangular brush section at its tip, and the brush section has multiple bristle bundles that are parallel to the arm with the bristles facing the rotating section.

Description

[Technical Field]

[0001] The present invention relates to a toothbrush device for cleaning the backs of upper and lower teeth when brushing teeth. [Background technology]

[0002] Conventionally, toothbrushes have been used to brush the front and back of the upper and lower teeth using toothbrushes with bristles that are integrated with the handle and parallel to the handle at the tip of a generally straight handle. Furthermore, a double-sided toothbrush is known that allows for efficient and time-saving tooth brushing, an essential habit even in busy daily lives (see Patent Document 1). In addition, a toothbrush for brushing the back of teeth is known, which has a curved neck that allows the bristles to directly brush the backs of the teeth and molars (see Utility Model Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2024-024155 Public Relations Utility Model Document No. 2 No. 3240379 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, toothbrushes have been used with a roughly straight handle at the tip, with bristles that are integrated with the handle and parallel to the handle, and the backs of the upper and lower teeth have been brushed by devising the angle and direction of the handle, but even skilled brushers have found it impossible to easily and reliably prevent missed spots and brush thoroughly. Furthermore, even if a bend is simply provided in the neck of the toothbrush shown in Utility Model Document 2, it is impossible to make the bristles face the back of the teeth evenly, and it is not possible to easily and reliably eliminate any areas that are left unbrushed. The present invention has been made to solve the above problems. [Means for solving the problem]

[0005] The toothbrush body has a handle with a grip at the rear and a brush with multiple bristle bundles. When the handle is in an upright position, the handle has a rotating part with a built-in round bar-shaped rotating body at its upper tip, and the rotating part has a dial part directly connected to the rotating body at its back surface, and the rotating part has a round bar-shaped or strip-shaped arm part about 3 cm long that is integral with the rotating body at the surface opposite to the dial part and is perpendicular to the handle in the upright position, and the arm part has a front arm part that is bent at a right angle upward at its tip and extends about 1 cm in a vertical position, The front arm has the brush part having a wide rectangular shape at the tip thereof, The brush part has a plurality of bristle bundle parts that are parallel to the arm parts and whose bristle tips face the rotating part side. The toothbrush for cleaning the backs of the upper and lower teeth is constructed as described above. [Effects of the Invention]

[0006] The present invention makes it possible for anyone, regardless of age or gender, to easily and reliably brush the backs of the upper and lower teeth cleanly, which was previously considered impossible, while preventing any areas from being left unbrushed. This helps prevent bad breath and periodontal disease caused by incomplete brushing, keeps the oral cavity clean, and is beneficial for your health. [Brief explanation of the drawings]

[0007] [Figure 1] A perspective view of the present invention [Figure 2] A perspective view of the present invention [Figure 3] FIG. 1 is a perspective view showing a state in which the present invention is used; [Figure 4] FIG. 1 is a perspective view showing a state in which the present invention is used; [Figure 5] FIG. [Figure 6] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described. First, the toothbrush device (1) for cleaning the backs of the upper and lower teeth of the present invention is available in two types, one for adults and one for children. However, apart from the difference in size, the shape and structure are the same, and in this embodiment, the adult version will be described. Claim 1 (i) The toothbrush body (2) comprises a plastic handle (3) with a grip (4) at the rear, and a brush part (9) with multiple bristle bundles (9a). (b) When the handle portion (3) is set upright, the handle portion (3) has a rotating portion (5) at its upper tip portion, which has a built-in round rod-shaped rotating body portion (5a), and the rotating portion (5) has a dial portion (6) at its back portion, which is directly connected to the rotating body portion (5a). (c) The rotating part (5) is provided with an arm (7) that is integral with the rotating body part (5a) on the surface opposite to the dial part (6), is perpendicular to the upright handle part (3), is horizontal, is round bar or strip-shaped and is about 3 cm long, and the tip of the arm (7) is bent upward at a right angle to form a front arm (8) that extends about 1 cm in a vertical position. (d) The front arm (8) has a brush part (9) made of plastic material and shaped like a wide rectangle at the tip. (e) The brush part (9) has a plurality of bristle bundles (9a) parallel to the arm part (7) with bristle tips (9b) facing the rotating part (5). See Figures 1 and 2. Claim 2 (f) The rotating part (5) has a threaded part (5e) with a plurality of threaded recesses (5b) and threaded protrusions (6a) on the outer periphery of the built-in rotating body part (5a) near the dial part (6). See Figure 6. (g) The screw portion is provided with narrow recesses (5z) on the dial portion (6) side and the arm portion (7) side, which are fastened by rotating the dial portion (6) to freely rotate the brush portion (9) 180 degrees from the directly below position to the directly above position or from the directly above position to the directly below position. The present invention has the above structure. The toothbrush (1) for cleaning the backs of upper and lower teeth of the present invention can be freely changed over to cleaning the backs of upper and lower teeth, and when using it, one of the two can be selected first (see Figure 2). When starting from the back of the upper teeth, hold the handle (3) with your right or left hand, and with the fingers of your other hand, pinch and turn the dial (6) to the right, so that the brush part (9) is directly above the handle (3) in an upright position. At this time, the screw (5e) functions (thread recess 5p, narrow recess 5z, thread protrusion 6a) to rotate 180 degrees up and down, and the screw will naturally stop tightening. See Figure 6. After applying toothpaste to the bristles (9b), move the handle (3) upright to the front of the mouth, insert the brush part (9) from the back into the open mouth, and then lift it slightly upward and move it toward the teeth until the bristles (9b) come into contact with the backs of the upper teeth (U). See Figure 3. Then, by moving the handle (3) in small increments from side to side or up and down, the bristle tips (9b) that come into wide and even contact with the backsides of the upper teeth (U) sweep away the dirt adhering to the teeth evenly, so that no areas are left unbrushed easily and reliably. Next, to brush the backs of the lower teeth (K), turn the dial part (6) counterclockwise to move the brush part (9) to the position directly below. See Figure 4. The remaining steps are omitted here as they are the same as those for brushing the backs of the upper teeth. In addition, the brush part (9) is a wide rectangular shape, so it can easily reach the backs of the upper and lower molars and brush them reliably, so there is no need to worry about missing any spots. The toothbrush (1) for brushing the backs of the upper and lower teeth can be easily and reliably brushed cleanly by moving the handle (3) in small movements from side to side or up and down, and is comfortable to use, allowing anyone, regardless of age or gender, to brush their teeth easily and enjoyably without leaving any areas unbrushed. [Explanation of symbols]

[0009] 1 Upper and lower back brushing toothbrush, 2 Toothbrush body, 3 Handle, 4 Grip, 5 Rotating part, 5a Rotating body part, 5e Screw part, 5p Screw recess, 5z Narrow recess, 6 Dial part, 6a Screw convex part, 7 Arm part, 8 Tip arm part, 9 Brush part, 9a Bristle bundle part, 9b Bristle tip part, S User, U Upper front teeth, K Lower front teeth, T Hand

Claims

1. The toothbrush body has a handle with a grip at the rear and a brush with multiple bristle bundles. When the handle is set upright, the handle (3) has a rotating part with a built-in round bar-shaped rotating body at its upper tip, and the rotating part has a dial part directly connected to the rotating body at its back. The rotating part is integral with the rotating body part on the surface opposite to the dial part, and has a horizontal round bar or strip-shaped arm part about 3 cm long, perpendicular to the upright handle part, and the tip of the arm part is bent upward at a right angle to form a front arm part that extends about 1 cm in a vertical position, The front arm has the brush part having a wide rectangular shape at the tip thereof, The toothbrush for brushing the backs of the upper and lower teeth is characterized in that the brush part has a plurality of bristle bundles arranged parallel to the arm parts with the bristle tips facing the rotating part.

2. the rotating part is provided with a threaded part having a plurality of threaded recesses and threaded protrusions on an outer circumferential portion of the built-in rotating body part near the dial part, The toothbrush device for cleaning the backs of the upper and lower teeth according to claim 1, characterized in that the screw portion has narrow recesses on the dial portion side and the arm portion side that allow the brush portion to be rotated freely by half a turn of 180 degrees from the directly below position to the directly above position, or from the directly above position to the directly below position, and then tightened.

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