Electric toothbrush with angled brush head

Abstract

The invention relates to a toothbrush (1) comprising: a) a handle (2) having an upper surface (2a) and a lower surface (2b); and b) a replaceable brush head (3) removably attached to the brush handle (2) wherein the replaceable brush head (3) comprises three linear segments (4, 5, 6) angled relative to each other wherein: i) a first segment (4) is located at an end (7) remote from the brush handle (2) and comprises bristle tufts (8); ii) the second section (5) defines the neck of the brush head (3) at the end (9) close to the handle (2) and comprises means for removable attachment with the handle (2); and iii) a third section (6) is between the first section (4) and the second section (5), and wherein the handle (2) is defined by a first reference plane X '-X "orthogonal to the handle and a second reference plane Y'-Y" abutting the handle at its lower surface (2b) and perpendicular to X '-X ", where the third section (6): A. forms an angle (alpha) of 1 to 30 degrees with the reference plane 4'-4" of the first section (4) abutting its lower side (4a); b. Forming an angle (beta) of 1 to 40 DEG with the reference plane 5 '-5 "of the second segment (5) abutting the underside (5a) thereof; and C. The reference plane 5 '-5 "of the second segment (5) abutting the underside thereof forms an angle (gamma) of 1 to 60 degrees with respect to the first reference plane (X'-X"), where the first and second segments (4, 5) project upwardly and inwardly with respect to the first reference plane (X '-X ") to define the angles (alpha), (beta) and (gamma), where the toothbrush is an electric toothbrush.

Description

Technical Field

[0001] The present invention relates to an electric toothbrush. Background Art

[0002] Electric toothbrushes are well known in the art and typically comprise a motor housed within a handle and a replaceable brush head.

[0003] Most electric toothbrushes achieve cleaning by rapidly moving the brush head (hereinafter referred to as an oscillating brush), but some only vibrate (hereinafter referred to as a vibrating brush).

[0004] There are many types of oscillating brushes on the market, some with specific oscillation patterns, such as longitudinal oscillating elements, or they may have multiple brush heads. They include a rotating head and a sideways oscillating array of bristles away from the brush handle.

[0005] Manual brushes having flexible brush heads are also well known.

[0006] The disadvantage of oscillating brushes is that the electrical equipment required for proper brushing is expensive. A disadvantage of vibrating brushes, which are generally cheaper, is that they need to vibrate quite a bit to clean. This vibration is often uncomfortable for the user because the brush handle usually vibrates as much as the brush head.

[0007] US2015289639 A1 (Dr. Fresh LLC) discloses a toothbrush comprising a handle, a brush head with bristles, and a neck. The neck is curved and angled away from the axis of the handle and then angled in a direction toward the axis.

[0008] US6948209 B2 (P&G., 2005) discloses an electric toothbrush with a flexible neck for lateral, rearward and forward flexibility of the brush head, which is achieved by using a polymer blend. By utilizing a mixture of polymers in the neck, various degrees of flexibility can be achieved in the area of ​​the neck.

[0009] US2017143460 A1 (Latikka Lauri) discloses a brush head for an electric toothbrush having a hollow body portion, a reciprocating shaft within the body portion, and a rotating bristle carrier at a first end of the body portion that rotates back and forth on the shaft. The second end of the shaft includes a protrusion that is inclined at an angle of 20 to 70 degrees relative to the shaft's rotational axis. The inclination points toward the shaft's rotational axis.

[0010] US6353959 B1 (Thomas Andrew, 2002) discloses a toothbrush suitable for use by an individual to brush another person's teeth as well as their own. The toothbrush comprises a handle, a neck, and a bristle brush head angled relative to the neck. The handle has a notch to allow the user's fingers to more easily grip and guide the toothbrush, and the bristle brush head is an oval, rounded head with bristles therein. The toothbrush is moved throughout the oral cavity, thereby facilitating effective brushing while the person is using the toothbrush to clean another person's teeth and gums. The toothbrush has an oval bristle brush head extending from the neck at an angle of 142 to 155 degrees.

[0011] WO0074522 A1 (Unilever) discloses an electric toothbrush with a flexible brush head.

[0012] Reaching the inner dental arches can be awkward and difficult with a conventional electric toothbrush, as the neck and head of the toothbrush are in line with the handle of the toothbrush. To overcome this difficulty and make it easier to position the electric toothbrush head on all tooth surfaces, the inventors have observed that the electric toothbrush of the present invention makes it easier to reach almost all areas of the oral cavity, enabling even those with manual dexterity challenges to clean their teeth more effectively and easily. The areas considered most difficult to reach are the inner upper and lower dental arches and the teeth at the back of the mouth. Making it easier to reach means that the user can gain more control over the movement and force applied when brushing. Summary of the Invention

[0013] According to a first aspect, a toothbrush (1) is disclosed comprising:

[0014] a) a brush handle (2) having an upper surface (2a) and a lower surface (2b); and

[0015] b) a replaceable brush head (3) removably attached to the brush handle (2),

[0016] in,

[0017] The replaceable brush head (3) comprises three linear segments (4,

[0018] 5, 6), where:

[0019] i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8);

[0020] ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2); and

[0021] iii) the third segment (6) is between the first segment (4) and the second segment (5), and

[0022] The brush handle (2) is defined by a first reference plane X'-X" perpendicular to the brush handle and a second reference plane Y'-Y" abutting the brush handle at its lower surface (2b) and perpendicular to X'-X",

[0023] The third paragraph (6) states:

[0024] A. forming an angle (α) of 1 to 30° with a reference plane 4'-4" on which the first section (4) abuts against its underside (4a);

[0025] B. A reference plane 5'-5" against the lower side (5a) of the second section (5)

[0026] forming an angle (β) of 1 to 40°; and

[0027] C. The reference plane 5'-5" of the second section (5) against its lower side forms an angle of 1 to 50 degrees relative to the first reference plane (X'-X").

[0028] (γ).

[0029] wherein said first and second segments (4, 5) project upwardly and inwardly relative to said first reference plane (X'-X") to define said angle (α),

[0030] (β) and (γ),

[0031] in

[0032] The toothbrush is an electric toothbrush.

[0033] According to a second aspect, disclosed is a replaceable brush head (3) for removably attaching to a handle (2) of an electric toothbrush (1), the brush head (3) comprising three linear segments (4, 5, 6) angled relative to each other, wherein:

[0034] i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8);

[0035] ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2); and

[0036] iii) the third section (6) is between the first section (4) and the second section (5),

[0037] And wherein the third paragraph (6):

[0038] a. A reference plane 4'-4" with the first section (4) abutting against its lower side (4a)

[0039] forming an angle (α) of 1 to 30°;

[0040] b. A reference plane 5'-5" with which the second section (5) abuts its lower side (5a)

[0041] forming an angle (β) of 1 to 40°; and

[0042] c. forming an internal angle (δ) of 130 to 179° relative to the reference plane 5'-5" of the second segment (5),

[0043] wherein the first and second sections (4, 5) are arranged relative to the third section (6)

[0044] According to a third aspect, disclosed is a kit of electric toothbrushes (1), comprising:

[0045] a) a brush handle (2); and

[0046] b) a replaceable brush head (3) removably attached to the brush handle (2), and

[0047] c) Optionally, batteries, charging cable and instructions / operating instructions,

[0048] in,

[0049] The replaceable brush head (3) comprises three linear segments (4, 5, 6) angled relative to each other, wherein:

[0050] i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8);

[0051] ii) The second section (5) defines the neck of the brush head (3) near the end (9) of the brush handle (2) and includes a

[0052] a removably attachable device; and

[0053] iii) the third section (6) is between the first section (4) and the second section (5),

[0054] And wherein the third paragraph (6):

[0055] A. A reference plane 4'-4" against the lower side (4a) of the first section (4)

[0056] forming an angle (α) of 1 to 30°;

[0057] B. A reference plane 5'-5" against the lower side (5a) of the second section (5)

[0058] forming an angle (β) of 1 to 40°; and

[0059] C. forming an internal angle (δ) of 130 to 179° relative to the reference plane 5'-5" of said second section (5),

[0060] wherein the first and second sections (4, 5) are arranged relative to the third section (6)

[0061] Projecting upwardly and inwardly to define said angles (α), (β) and (δ).

[0062] Detailed description of the invention

[0063] The invention relates to an electric toothbrush (1). The toothbrush comprises a brush handle (2); and a replaceable brush head (3) removably attached to the brush handle (2).

[0064] The brush head can be attached to and subsequently detached from the brush handle. Thus, the brush handle can be used in conjunction with a variety of brush heads, significantly extending the life of the brush handle relative to known toothbrushes. A used brush head can be discarded, and the brush handle can be used for extended periods of time.

[0065] Preferably, the cross-section of the brush handle is ergonomically sized to fit comfortably in the hand.

[0066] The handle preferably includes a thumb rest made of a thermoplastic elastomer material and / or a polypropylene material. These materials can be easily injection molded onto the heavy resin material described above. Such a thumb rest can provide improved handling characteristics for the toothbrush handle, such as having anti-slip properties to improve the operability of the oral care appliance in wet conditions (e.g., when the user is brushing their teeth). The thumb rest can be made of a thermoplastic elastomer having a Shore A hardness of about 30 to about 60, or about 40, to prevent the oral care appliance from being too slippery when used in wet conditions.

[0067] Preferably, the brush handle includes a motor element that vibrates or oscillates the bristle tufts (8). The brush head has corresponding movable bristles driven by the motor and a drive mechanism disposed within a cavity of the brush handle. Preferably, a shaft is disposed within the flexible neck that is operatively connected to the movable bristle carrier and the motor.

[0068] Replaceable brush heads

[0069] Preferably, the brush head is made of a material with a density of 0.5 to 1.2 g / cm 3 , preferably 0.7 to 1.0 g / cm 3 Preferably, the brush head is made of a thermoplastic polymer such as polypropylene. On the other hand, preferably, the brush handle is made of a density of 2.1 to 3.1 g / cm 3, preferably 2.3 to about 2.8 g / cm 3 Made of denser material.

[0070] The replaceable brush head comprises first, second and third linear segments (4, 5, 6) which are angled relative to each other. The first, second and third segments are continuous, i.e. there are no breaks or connections between them and the three segments together form a continuous uninterrupted profile.

[0071] The replaceable brush head (3) is removably attached to the brush handle (2). The replaceable brush head (3) comprises three linear segments (4, 5, 6) that are angled relative to each other. The first segment (4) is at the end (7) remote from the brush handle (2) and comprises a tuft of bristles (8).

[0072] The tufts can be attached to the brush head by means of a hot tufting process. A method for manufacturing a brush head with filament tufts embedded in the brush head may include the following steps: in a first step, a tuft is formed by providing a desired amount of filaments. In a second step, the tuft is placed in a mold cavity so that the ends of the filaments to be attached to the brush head extend into the cavity. The opposite ends of the filaments that do not extend into the cavity may be rounded or non-rounded. For example, in the case where the filaments are tapered filaments with pointed tips, the filaments may not be rounded at the ends. In a third step, the brush head is formed around the ends of the filaments extending into the mold cavity by an injection molding process, thereby anchoring the tuft in the brush head. Alternatively, the tuft can be anchored by forming a first part (a so-called "sealing plate") of the brush head around the ends of the filaments extending into the mold cavity by an injection molding process before the rest of the oral care appliance is formed. Before starting the injection molding process, the ends of the tufts extending into the mold cavity may optionally be melted or melt-bonded to join the filaments together in the form of a molten mass or ball so that the molten mass or ball is located within the cavity. The tufts can be held in the mold cavity by a mold rod having blind holes corresponding to the desired location of the tufts on the finished brush head of the oral care appliance. In other words, the tufts attached to the brush head by means of a hot tufting process are not doubled in the middle along their length and are not installed in the brush head by using anchors / pins. The tufts are installed on the brush head by an anchorless tufting process.

[0073] Alternatively, the brush head can be provided with a bristle carrier having at least one tuft hole (e.g. a blind end hole). The tuft comprising a plurality of filaments can be fixed / anchored in the tuft hole by a binding process / anchor tufting method. This means that the filaments of the tuft are bent / folded in a substantially U-shaped manner around an anchor (e.g. an anchor wire or anchor plate made of metal). The filaments are pushed into the tuft hole together with the anchor so that the anchor penetrates the opposite side walls of the tuft hole, thereby anchoring / fixing / fastening the filament to the bristle carrier. The anchor can be fixed in the opposite side walls by form engagement and friction engagement. In the case where the tuft hole is a blind end hole, the anchor holds the filament against the bottom of the hole. In other words, the anchor can be located in a substantially vertical manner on the U-shaped bend. Since the filaments of the tuft are bent around the anchor in a substantially U-shaped configuration, the first branch and the second branch of each filament extend from the bristle carrier in the direction of the filament. The type of filament that can be used / suitable for a binding process is also referred to as a "double-sided filament". Brush heads for oral care implements manufactured by the binding process can be provided in a relatively low-cost and time-efficient manner.

[0074] The second section (5) defines the neck of the brush head (3) near the end (9) of the handle (2) and includes means for removably attaching to the handle (2).

[0075] Removable attachment may be provided in various ways.

[0076] The function of the removable attachment is to enable the user to engage the replaceable brush head with the brush handle so that the toothbrush becomes usable. After a single use, the appliance can be set aside without being disassembled until the next need arises. In the event that the brush head wears out, or when the user may want to change the relevant application (such as tongue cleaning after brushing), the brush head may need to be replaced while using the same brush handle but with a different brush head.

[0077] In one aspect, the brush handle includes an insert and the second section of the brush head includes a receiving opening, which together are mutually engageable for removable attachment. Alternatively, the brush handle includes a receiving opening and the second section of the brush head includes an insert, and which together are mutually engageable for said removable attachment.

[0078] It is also preferred that the removable attachment comprises a press fit arrangement, screw threads, bayonet or magnetic arrangement for attachment to a correspondingly configured brush head.

[0079] In one aspect, preferably, the removable attachment in the brush handle includes a shaft provided with a slot, and the corresponding brush head has an elastic clip provided on the cavity wall of the connecting cavity, where the elastic clip can engage with the slot.

[0080] Alternatively, the removable attachment comprises a bayonet element and a socket; the bayonet is included in the brush handle and the socket is formed in the brush head. The socket preferably comprises an axis, an opening, and first and second channels positioned transversely opposite each other, wherein each channel comprises: a first channel portion extending axially from the opening and having a first transverse dimension; and a second channel portion extending axially from the first channel portion and having a second transverse dimension greater than the first transverse dimension; and the bayonet element comprises an axis and first and second protrusions positioned diametrically opposite each other, wherein each protrusion extends outwardly from the bayonet element and is axially receivable by a corresponding first channel portion and transversely receivable by a corresponding second channel portion.

[0081] The bayonet element can be inserted into the socket by first aligning each of the first and second protrusions with the corresponding first channel portion and then axially moving the bayonet element into the socket. Once the bayonet element has been axially moved into the socket so that each protrusion moves through the corresponding first channel portion and into the corresponding second channel portion, the bayonet element can be rotated relative to the socket about its axis so that each protrusion moves laterally across the corresponding second channel portion. When the bayonet is received by the socket, the brush head can be removably attached to the brush handle.

[0082] The third section (6) is between the first section (4) and the second section (5).

[0083] The first and second segments (4, 5) project upwardly and inwardly relative to the third segment (6) to define the angles (α), (β) and (δ). Upwardly and inwardly means that the segments (4, 5) are inclined in a direction oriented toward the brush head and the bristle tufts (8).

[0084] The handle (2) is defined by a first reference plane X'-X" orthogonal to the handle and a second reference plane Y'-Y" abutting the handle at its lower surface (2b) and perpendicular to X'-X".

[0085] Orthogonal also means perpendicular to and abutting means touching or having a point of contact like a tangent line touches a circle.

[0086] The third section of the brush head (6):

[0087] A. forming an angle (α) of 1 to 30° with a reference plane 4'-4" on which the first section (4) abuts against its underside (4a);

[0088] B. forming an angle (β) of 1 to 40° with a reference plane 5'-5" on which the second section (5) abuts against its underside (5a); and

[0089] C. The reference plane 5'-5" of the second section (5) against its underside forms an angle (γ) of 1 to 60° with respect to the first reference plane (X'-X").

[0090] wherein said first and second segments (4, 5) project upwardly and inwardly relative to said first reference plane (X'-X") to define said angles (α), (β) and (γ),

[0091] Preferably, the angle (α) is 5 to 25°. Preferably, the angle (β) is 5 to 35°. Preferably, the angle (γ) is 15 to 60°.

[0092] Preferably, the length of the first section (4) of the brush head is 3 to 35 mm. Preferably, the length of the second section (5) is 5 to 50 mm. It is further preferred that the section (5) of the replaceable brush head (3) has a rectangular, square, circular, oval or trapezoidal cross-section. The second section (5) defines a neck of the brush head (3) near the end (9) of the brush handle (2) (i.e. opposite the end of the bristles) and includes means for removably attaching to the brush handle (2).

[0093] Preferably, the length of the third section (6) is 3 to 35 mm. The third section (6) is between the first section (4) and the second section (5) and has a reference plane 6'-6".

[0094] The reference plane (6'-6") defines an angle (α) of 1 to 30° with the reference plane 4'-4" of the first section (4), an angle (β) of 1 to 40° with the reference plane 5'-5" of the second section (5), and the reference plane 5'-5" of the second section (5) forms an angle (γ) of 1 to 50° with respect to the first reference plane (X'-X").

[0095] The present invention also relates to a replaceable brush head (3) for removably attaching to a handle (2) of an electric toothbrush (1), said brush head (3) comprising three linear segments (4, 5, 6) angled relative to each other, wherein:

[0096] i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8);

[0097] ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2);

[0098] and

[0099] iii) the third section (6) is between the first section (4) and the second section (5),

[0100] And wherein the third paragraph (6):

[0101] a. forming an angle (α) of 1 to 30° with the reference plane 4'-4" of the first section (4) abutting its underside (4a);

[0102] b. forming an angle (β) of 1 to 40° with a reference plane 5'-5" of the second section (5) abutting its underside (5a); and

[0103] c. forming an internal angle (δ) of 130 to 179° relative to the reference plane 5'-5" of the second segment (5),

[0104] The first and second segments (4, 5) protrude upward and inward relative to the third segment (6) to define the angles (α), (β) and (δ).

[0105] Preferably, the internal angle (δ) is from 135 to 160°, more preferably from 140 to 160°.

[0106] The present invention also relates to a kit of electric toothbrushes (1), comprising:

[0107] a) a brush handle (2); and

[0108] b) a replaceable brush head (3) removably attached to the brush handle (2), and

[0109] c) Optionally, batteries, charging cable and instructions / operating instructions,

[0110] in,

[0111] The replaceable brush head (3) comprises three linear segments (4, 5, 6) angled relative to each other, wherein:

[0112] i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8);

[0113] ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2); and

[0114] iii) the third section (6) is between the first section (4) and the second section (5),

[0115] And wherein the third paragraph (6):

[0116] a. forming an angle (α) of 1 to 30° with the reference plane 4'-4" of the first section (4) abutting its underside (4a);

[0117] b. forming an angle (β) of 1 to 40° with a reference plane 5'-5" of the second section (5) abutting its underside (5a); and

[0118] c. forming an internal angle (δ) of 130 to 179° relative to the reference plane 5'-5" of the second segment (5),

[0119] The first and second segments (4, 5) protrude upward and inward relative to the third segment (6) to define the angles (α), (β) and (δ).

[0120] All preferred features of the replaceable brush head and handle have been disclosed above. BRIEF DESCRIPTION OF THE DRAWINGS

[0121] The present invention will now be described in detail with reference to the following drawings, in which:

[0122] Figure 1 is an embodiment of an electric toothbrush according to the present invention.

[0123] Figure 2 is an embodiment of a replaceable brush head according to the present invention.

[0124] Figure 3 A brush handle for an electric toothbrush is disclosed as part of a kit according to the present invention. DETAILED DESCRIPTION

[0125] Figure 1

[0126] Seen here is an electric toothbrush (1) comprising an elongated handle (2) having an upper surface (2a) and a lower surface (2b). The upper surface is the surface on one side of the bristles and the lower surface is on the underside or opposite side of the handle.

[0127] The replaceable brush head (3) is attached to the brush handle (2) at the point marked (9), but the attachment is not visible in this view because it is hidden. The brush handle (2) includes a motor (also not visible) that causes the bristle tufts (8) to vibrate or oscillate. The brush handle (2) includes an insert (10) and the second section (5) includes a receiving opening (11), which together are interengageable for said removable attachment. Features (10, 11) are not visible in this view.

[0128] In this embodiment, the replaceable brush head (3) comprises three linear segments (4, 5, 6) that are angled relative to each other. The first segment (4) is located at the end (7) distal to (or away from or remote from) the handle (2). The first segment comprises tufts of bristles (8).

[0129] The second section (5) defines the neck of the brush head (3) near the end (9) of the handle (2).The second section has means for removably attaching to the handle (2).

[0130] The third section (6) is between the first section (4) and the second section (5).

[0131] The handle (2) is defined by a first reference plane X'-X" which is orthogonal (i.e. at right angles) to the handle and a second reference plane Y'-Y" which abuts (i.e. touches, as a tangent touches a circle) the handle at its lower surface (2b) and is perpendicular to X'-X".

[0132] This third section (6) forms an angle (α) of 1 to 30° (here 15°) with a reference plane 4'-4" on which the first section (4) abuts against its underside (4a).

[0133] Furthermore, the third section (6) forms an angle (β) of 1 to 40° (here 25°) with the reference plane 5'-5" of the second section (5) against its lower side (5a). The reference plane 5'-5" of the second section (5) against its lower side forms an angle (γ) of 1 to 50° (here about 35°) with respect to the first reference plane (X'-X").

[0134] The first and second segments (4, 5) project upwardly and inwardly relative to a first reference plane (X'-X") to define angles (α), (β), and (γ).

[0135] The shaded portion marked (A) may be present in the handle (2) or alternatively comprised in the brush head (3). The profile of the other portion (applicable to 2 or 3) may be shaped accordingly, beveled or straight.

[0136] Figure 2 Embodiments of replaceable brush heads according to the present invention are disclosed.

[0137] Seen here is a brush head (3) comprising three linear segments (4, 5, 6) that are angled relative to each other.

[0138] The angles (α), (β) and (γ) are better visible and understandable in this figure. In addition, it can be seen in this view that the third section (6) of the brush head (3) forms an internal angle (δ) of 130 to 179° with respect to the reference plane 5'-5" of the second section (5). In this figure, δ is about 150°.

[0139] The first and second segments (4, 5) project upwardly and inwardly relative to the third segment (6) to define the angles (α), (β) and (δ).

[0140] Figure 3A brush handle for an electric toothbrush is disclosed as part of a kit according to the present invention. The brush handle is provided with a plurality of buttons (12, 13) intended to control functions of the toothbrush (1), which may be as simple as buttons for turning the toothbrush on / off or changing its operating mode. The brush handle (2) is provided with an insert (10) which is interengageable with a second section (5) of the brush head (3) including a receiving opening (11) for said removable attachment. The opening and the brush head are not included in this figure.

Claims

1. A toothbrush (1), comprising: a) a brush handle (2) having an upper surface (2a) and a lower surface (2b); as well as b) a replaceable brush head (3) removably attached to the brush handle (2), in, The replaceable brush head (3) comprises three linear segments (4, 5, 6) angled relative to each other, wherein: i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8); ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2); and iii) the third section (6) is between the first section (4) and the second section (5), as well as The brush handle (2) is defined by a first reference plane X'-X" perpendicular to the brush handle and a second reference plane Y'-Y" abutting the brush handle at its lower surface (2b) and perpendicular to X'-X", The third paragraph (6) states: A. forming an angle (α) of 1 to 30° with a reference plane 4'-4" on which the first section (4) abuts against its underside (4a); B. forming an angle (β) of 1 to 40° with a reference plane 5'-5" on which the second section (5) abuts against its underside (5a); and C. the reference plane 5'-5" of the second section (5) against its underside forms an angle (γ) of 1 to 60° with respect to the first reference plane (X'-X"), wherein said first and second segments (4, 5) project upwardly and inwardly relative to said first reference plane (X'-X") to define said angles (α), (β) and (γ), in The toothbrush is an electric toothbrush.

2. The toothbrush (1) according to claim 1, wherein the angle (α) is 5 to 25°.

3. The toothbrush (1) according to claim 1 or 2, wherein the angle (β) is 5 to 35°.

4. The toothbrush (1) according to any one of claims 1 to 3, wherein the angle (γ) is between 15 and 60°.

5. The toothbrush (1) according to any one of claims 1 to 4, wherein the length of the first section (4) is 3 to 35 mm.

6. The toothbrush (1) according to any one of claims 1 to 5, wherein the length of the second section (5) is 5 to 50 mm.

7. The toothbrush (1) according to any one of claims 1 to 6, wherein the length of the third section (6) is 3 to 35 mm.

8. The toothbrush (1) according to any one of claims 1 to 7, wherein the second section (5) of the replaceable brush head (3) has a rectangular, square, circular, oval or trapezoidal cross section.

9. The toothbrush (1) according to any one of claims 1 to 8, wherein the brush handle (2) comprises a motor for vibrating or oscillating the bristle tufts (8).

10. The toothbrush (1) according to any one of claims 1 to 9, wherein the handle (2) comprises an insert (10) and the second section (5) comprises a receiving opening (11), the insert and the receiving opening together being mutually engageable for said removable attachment.

11. The toothbrush (1) according to any one of claims 1 to 9, wherein the handle (2) comprises a receiving opening (11) and the second section (5) comprises an insert (10), the receiving opening and the insert together being mutually engageable for said removable attachment.

12. A replaceable brush head (3) for removably attaching to a handle (2) of an electric toothbrush (1), said brush head (3) comprising three linear segments (4, 5, 6) angled relative to one another, wherein: i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8); ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2); and iii) the third section (6) is between the first section (4) and the second section (5), And wherein the third paragraph (6): A. forming an angle (α) of 1 to 30° with a reference plane 4'-4" on which the first section (4) abuts against its underside (4a); B. forming an angle (β) of 1 to 40° with a reference plane 5'-5" on which the second section (5) abuts against its underside (5a); and C. forming an internal angle (δ) of 130 to 179° relative to the reference plane 5'-5" of said second section (5), The first and second segments (4, 5) protrude upward and inward relative to the third segment (6) to define the angles (α), (β) and (δ).

13. A kit for an electric toothbrush (1), comprising: a) Brush handle (2); as well as b) a replaceable brush head (3) removably attached to the brush handle (2), and c) Optionally, batteries, charging cables, and instructions, The replaceable brush head (3) comprises three linear segments (4, 5, 6) angled relative to each other, wherein: i) a first section (4) located at an end (7) remote from the handle (2) and comprising tufts of bristles (8); ii) a second section (5) defining a neck of the brush head (3) near the end (9) of the handle (2) and comprising means for removably attaching to the handle (2); and iii) the third section (6) is between the first section (4) and the second section (5), And wherein the third paragraph (6): A. forming an angle (α) of 1 to 30° with a reference plane 4'-4" on which the first section (4) abuts against its underside (4a); B. forming an angle (β) of 1 to 40° with a reference plane 5'-5" on which the second section (5) abuts against its underside (5a); and C. forming an internal angle (δ) of 130 to 179° relative to the reference plane 5'-5" of said second section (5), The first and second segments (4, 5) protrude upward and inward relative to the third segment (6) to define the angles (α), (β) and (δ).

Images