Replaceable head - gentle toothbrush

Abstract

Replaceable-head soft toothbrush (1), consisting of an interchangeable brush head (4) which can be pressed into a spring wire part (3) which is firmly connected to a handle (2) as an injection-molded part.

Description

[0001] Main claim: Replaceable head gentle toothbrush (1) in which a shaped spring wire part (3) is firmly injected into a handle (2) made of plastic, into which an easily replaceable brush head (4) can be pressed in and out again with just the thumb for changing and in which the brush head (4) exerts as even a permissible pressure as possible on the teeth during brushing and also on the gums. Description

[0002] The replaceable head gentle toothbrush (1) with a spring wire part (3) firmly injected into the handle (2) consisting of a smooth, rust-proof spring wire part (3), which securely holds a brush head (4) pressed into the spring wire part (3) when brushing teeth.

[0003] The wire thickness of the spring wire (3) is adjusted so that the brush head (4) reliably springs softly during brushing, ensuring that the permissible contact pressure on the teeth is not exceeded, and therefore only minimal abrasion of tooth enamel is achieved. The soft spring action also protects the gums.

[0004] The handle (2) has a rectangular, rounded basic shape and provides a good grip, allowing optimal alignment of the brush head (4) to the teeth when brushing.

[0005] The replaceable brush head (4) made of plastic is equipped with bristles (5) that can be selected from the hardness, soft, medium or hard.

[0006] The brush heads (4) have a surrounding edge (6) above the bristles (5), on which the brush heads (4) rest on the spring wire part (3), thus reliably preventing accidental pushing out while brushing. The surrounding edge (6) runs flush with the outer contour of the spring wire part (3).

[0007] The brush heads (4) have a groove (8) at the front above the edge (6) which serves to better fixation when pressed into the spring wire part (3).

[0008] The brush head (4) has nubs (7) on both sides of the rear side, which push the spring wire part (3) apart laterally when the brush head (4) is pressed in. After the brush head (4) is pressed in, the spring wire part (3) springs back under the nubs (7), and the brush head (4) is clamped in place.

[0009] The spring wire part (3) is as free as possible in the upper area of ​​the brush heads (4) in order to minimize deposits of toothpaste residues or to enable easier cleaning of the brush area.

[0010] To temporarily clean the area of ​​the clamped brush head (4), the brush head (4) can be pushed out and reinserted as when changing the brush.

[0011] The spring wire part (3) is bent near the handle (2) to easily reach the back of the teeth when brushing. It is known

[0012] A toothbrush with a detachable plastic handle consisting of two parts, a spring wire part fixed in this as a leg spring and holder for a brush head, into which a replaceable brush head can only be inserted after the plastic handle has to be dismantled.

[0013] The spring wire part, with two areas designed as leg springs and the detachable plastic handle, has many difficult-to-clean, unhygienic dirt corners.

[0014] Toothbrush made of plastic, in one piece, with handle, brush neck and brush, the brush neck being wavy in design to achieve a slight spring effect of the brush.

[0015] Toothbrush made of plastic, consisting of two parts, handle and a replaceable element that can be plugged onto it, brush with brush neck.

[0016] Toothbrush made of plastic or metal with a pocket in the brush area to accommodate a replaceable brush head. The object of the invention

[0017] To create a toothbrush that removes as little of the enamel as possible when brushing your teeth and protects your gums while brushing.

[0018] To create a toothbrush in which pressure on the teeth does not normally exceed scientifically specified limits.

[0019] To create a toothbrush that is sustainable and only requires changing the brush head.

[0020] The toothbrush is designed to avoid unhygienic deposits as much as possible.

[0021] The toothbrush is designed so that dirt can be easily removed.

[0022] That the brush head can be changed effortlessly without tools.

[0023] That vertical brushing of the tooth gaps is possible despite the springy brush due to sufficient stability. The solution is

[0024] Starting from the described condition, a fixed connection of a shaped spring wire part that is injected into a handle by means of an injection molding machine.

[0025] That the spring wire part is made of a stainless, smooth spring wire, the wire diameter of which is selected so that the maximum contact pressure of the brush head on the teeth and gums when brushing is approximately 1 N.

[0026] Although the spring wire part with the two straight ends is firmly injected into the handle at a distance, the brush head springs up and down with sufficient stability even when brushing your teeth.

[0027] That the handle has an ergonomic rectangular rounded shape.

[0028] The brush head can be rectangular with rounded corners, or rectangular with rounded edges at the front and back.

[0029] The fact that the brush head has a groove at the front and knobs at the back and a support edge above the bristles means that it cannot be pushed through when pressed in and the spring wire part clamps the brush head laterally and fixes it to the front and back

[0030] The fact that the spring wire part only partially rests on the brush head minimizes dirt accumulation. Application and implementation examples

[0031] Replaceable head gentle toothbrushes shown individually or as components are shown on drawings Fig. 1 to Fig. 3 and described in more detail below.

[0032] They show: Fig. Figure 1 shows an example of a front and top view of a replaceable head gentle toothbrush (1) with a brush head (4) pressed into a spring wire part (3) that is molded into a handle (2). Fig. Figure 2 shows an example of a front and top view of a brush head (4) with a scale of approximately 1:1 and enlargements of the areas V is the groove (8). W is the nub (7). X is the groove (7). Y is the peripheral edge (6). Z is the nub (7). Fig. 3 shows an example of the spring wire part (3) in front and top view with approximate dimensions List of reference symbols 1 replaceable head gentle toothbrush 2 handles 3 spring wire part 4 brush heads 5 bristles 6 Surrounding edge 7 studs

Claims

[1] Replaceable head gentle toothbrush (1), consisting of a replaceable brush head (4) which can be pressed into a spring wire part (3) which is firmly connected to a handle (2) as an injection-molded part. [2] Replaceable head gentle toothbrush (1) according to claim 1 characterized by that the spring wire part (3) is so soft that a maximum desired contact pressure of 1N on teeth and gums is not exceeded when brushing. [3] Replaceable head gentle toothbrush (1) according to one of the preceding claims characterized by that the spring wire part (3) can be permanently pressed apart without damage when the brush head (4) is pushed in or out and springs back again so that the brush head (4) is held securely. [4] Replaceable head gentle toothbrush (1) according to one of the preceding claims characterized by that the spring wire part (3) is easy to clean with a water jet due to its open shape. [5] Replaceable head gentle toothbrush (1) according to one of the preceding claims characterized by that the brush head (4) can be easily pushed out of the spring wire part (3) and back in again using only the thumb, in order to quickly clean the brush head (4) and the spring wire part (3) with a water jet between the changing intervals. [6] Replaceable head gentle toothbrush (1) according to one of the preceding claims characterized by that the user can hold the bristles (5) of the brush head (4) in the direction of the teeth to be brushed thanks to the rectangular basic shape with the rounded edges of the handle (2).

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