Glasses stem with friction element at ear bend

Abstract

The present application describes an eyeglasses stem comprising a plate-like metal stem and a friction element at the ear bend. To avoid unintentional removal of the friction element from the metal stem, a first fixation means is formed. The first fixation means comprises a first lateral protrusion at the outermost second end of the eyeglasses stem. This lateral protrusion forms a recess with an outward opening together with the eyeglasses stem. The cross-section of this recess at the opening is smaller than the cross-section at the central part. Thereby, the resiliently plastic material of the friction element will be accommodated in the recess. The resilient material will be compressed, resulting in a clamping effect, which helps to fix the friction element and the metal stem, preventing unintentional separation of the friction element and the metal stem.

Description

TECHNICAL FIELD

[0001] The invention relates to a spectacle stem. BACKGROUND

[0002] The spectacle stem is used in a spectacle frame, which comprises a front frame and two spectacle stems connected to the front frame, preferably by means of a respective hinge, so that the spectacle stems are articulated to the front frame.

[0003] It has been known for many years to manufacture spectacle stems from plastic in the form of cellulose acetate.

[0004] Likewise, it has been known for many years to manufacture spectacle stems from metal, including titanium.

[0005] However, the invention is also applicable to spectacle stems made from other types of material, although the invention will be explained in the following text with specific reference to spectacle stems made from titanium.

[0006] It is known for spectacle stems to be provided with a rubbing element, which is preferably replaceable by the user. This rubbing element is usually a sleeve, which is fitted over the metal stem at the position of the ear bend, so as to rest against the user's ear. This is usually used for metal spectacle stems, but also for plastic spectacle stems, in the interest of user comfort. This avoids direct contact between the plastic and sweat, sebum and other secretions which degrade the plastic. However, these sleeves can result in impaired comfort, because the edges of the sleeve can cause discomfort to the user. Furthermore, there is a risk that the sleeve will shift along the metal stem, so that it does not remain in the optimum position at the ear bend.

[0007] For example, US 6045221 proposes to place the rubbing element in an embedded manner in a recess in the first end side of the metal stem, which first end of the metal stem is used to connect the front frame. Plastic, in particular cellulose acetate, is very sensitive to notches, which means that there can be no great dimensional variations in the spectacle stem, which is particularly true of the ear bend. This results in restrictions in the design of the plastic stem and the bracket element. The American specification therefore also shows a rubbing element in the form of a sleeve for the ear bend.

[0008] Cellulose acetate is a soft plastic material, which is therefore suitable for being bent in a plane to form the ear bend, for being placed against the user's ear and for being bent in a second plane to adapt to the shape of the user's head. Due to the softness of cellulose acetate, previous spectacle stems have had a considerable size, which makes bending difficult and which makes a pair of spectacles excessively heavy and full at the back of the ear.

[0009] For the sake of user comfort, it is desirable to minimise the size of the spectacle stem, both in terms of weight and fullness. However, strength and shape stability thereby become insufficient.

[0010] Furthermore, from US 4 563 066 a spectacle stem formed from a metal rod is known. At the end of the ear bend, the metal rod is covered by a plastic sheath which is fixed on the metal rod. In this area, the metal rod has a sawtooth-like protrusion which together with the adhesive ensures that the plastic sheath remains on the metal rod. The plastic sheath is enclosed in a teardrop-shaped silicone sheath end which is connected to the metal rod by the ear bend. It is not possible to replace this plastic-silicone composite sheath.

[0011] Furthermore, from KR 20200001172 U a spectacle stem of the type initially mentioned is known. It describes a spectacle stem which has a U-shaped curved end at its end, wherein on the outermost fold a first lateral protrusion is provided. From this, the U-shaped curved part will help to press the first lateral protrusion into the first lateral hole. The friction element is formed by a sheath, wherein the first lateral hole is formed in a hole of the sheath, which sheath surrounds the entire U-shaped curved end of the metal rod.

[0012] Furthermore, WO 2017 / 167342 A1 discloses a spectacle stem, which is mentioned in the first paragraph of the description. However, this document does not disclose that the spectacle stem can secure the friction element on the metal rod in a simple manner and ensure that the outer end of the metal rod is covered by the friction element.

[0013] Object of the invention

[0014] It is the object of the present invention to provide a spectacle stem which solves the problems of the known spectacle stems and which can ensure that the friction element is held on the metal rod in a simple manner, so that the outer end of the metal rod is covered with the friction element, whereby the user can easily and simply replace the friction element himself.

[0015] On the other hand, it is the object of the present invention to provide a metal spectacle stem, wherein the metal rod has a rectangular cross section and the friction element wraps one small side and two large sides of the metal rod in a large U-shaped duct of the friction element. Summary of the invention

[0016] According to the invention, this is achieved by a spectacle stem of the type initially mentioned, which is unique in that the first lateral protrusion of the plate-like stem is provided on its outermost second end portion, a longitudinally open groove is formed with the outermost second end portion of the metal rod, wherein the cross section at the opening of the groove is smaller than the cross section at the central portion of the groove, the friction element at the first end of the duct is closed by a dosed material at the first end portion of the friction element, the first lateral hole of the friction element is also obliquely oriented in the longitudinal direction, the elastic material at the first end portion of the friction element is accommodated in the open groove of the metal rod in an elastically compressed state.

[0017] When the friction element is mounted on the metal rod, the first transverse protrusion of the metal rod is pressed into the first transverse hole of the friction element, while simultaneously pressing the elastic material into the groove of the longitudinal opening. Due to the elasticity and plasticity of the friction element material, a press-fit fit is formed. This achieves a secure fixation of the friction element on the metal rod.

[0018] Because the cross-section of the groove at its opening is smaller than that at the center of the groove, the elastic material will be compressed, thus ensuring that the friction element does not unintentionally displace relative to the metal rod in the longitudinal direction.

[0019] The tilt direction of the first lateral protrusion of the eyeglass rod ensures that the first end portion of the friction element will not be unintentionally displaced relative to the lateral direction of the metal rod.

[0020] Therefore, the protrusion and groove can be referred to as the first fixing device, which ensures that the friction element is fixed to the metal rod, at least at the outermost end of the metal rod.

[0021] To ensure that the friction element does not unintentionally shift along its entire length relative to the lateral direction of the metal rod, additional securing devices are provided to prevent this. These devices can be mechanical interlocking, adhesive bonding, or similar mutual fixation. If adhesive bonding is used, it must be a type of bonding that can be easily broken so that the user can replace the friction element.

[0022] The size of the first lateral hole in the friction element can be made smaller than the size of the first lateral protrusion of the metal rod. Due to the elasticity and plasticity of the material, the first lateral protrusion of the metal rod is accommodated therewith with a clamping effect. This provides additional safety, preventing accidental displacement of the friction element relative to the metal rod.

[0023] When using a tubular friction element instead of the known sleeve / sheath, the upper edge region of the metal rod may also be visible at the upper opening edge of the friction element tube. It is also possible that the narrow edge region of the metal rod is located above the friction element, making it visible to the user. This is an ideal design element for eyeglasses.

[0024] The protruding edge area above the friction element channel will extend very little above the friction element, posing no risk of contact with the user.

[0025] Another important aspect to note is that the friction element is a "maintenance component," meaning it must be replaced over time. Therefore, it's crucial that the user can replace this component easily and quickly. By extending the metal rod slightly above the friction element, the user can more easily grasp the upper part of the friction element and pull or press it laterally to release the friction element from the metal rod.

[0026] If the friction element extends to a position not far from or above the top of the metal rod, it will be more difficult to generate lateral displacement because the user's fingers cannot form a clear grip to cause the silicone element to move laterally, as there is a risk that the fingers will also press on the top of the metal rod.

[0027] As used in this manual, the term "accidental" refers to a situation where, during normal use of the glasses, the friction element does not shift relative to the metal rod in the longitudinal or lateral direction. However, when a manual force is applied, this force can be applied by the user to intentionally shift the friction element relative to the metal rod in the longitudinal or lateral direction, allowing for replacement of the friction element.

[0028] In principle, the eyeglass rod comprises a rod element and a friction element. This application has already provided an explanation, wherein the rod element is referred to as a metal rod.

[0029] In this application, "plate-like" refers to a metal rod with a rectangular cross-sectional shape, where the first side is significantly smaller than the second side. For example, the ratio can range from 1:4 to 1:10 or even larger. Therefore, the first side can be referred to as the thickness of the plate, and the second side as the height of the metal rod. It is generally desirable for the eyeglass rod to have the smallest possible thickness in the area near the user's ear.

[0030] Therefore, the metal rod will have two large side surfaces and two small side surfaces forming the bottom and top surfaces in the second end portion. The cross-sections can be the same or different along the length of the metal rod. Thus, the metal rod can have a second and greater thickness in the first end portion and in the intermediate portion connecting the first and second end portions. Similarly, in the first end portion and the intermediate portion, the metal rod can have cross-sectional shapes other than a rectangle.

[0031] The metal rod provides shape stability for the eyeglasses. This shape stability is provided not only in the plane of the ear bend, but also when the metal rod is bent in a direction perpendicular to the ear bend, to adapt to the shape of the user's head.

[0032] According to one embodiment, the unique feature of the eyeglass rod of the present invention is that the bottom surface of the metal rod is provided with a second transverse protrusion for releasable snap-fit ​​engagement with a second hole at the bottom of the pipe, wherein the cross-section of the second protrusion at the connection between the second protrusion and the metal rod is smaller than the cross-section of the second protrusion at a greater distance from the metal rod; therefore, due to the elastic plasticity of the friction element material, the second protrusion is fixed in the second hole at the bottom of the pipe.

[0033] To achieve a particularly simple snap-fit ​​effect, the friction element is preferably made of a flexible and malleable material. This allows the user to create the snap-fit ​​effect in a very simple way. At the same time, the flexibility of the friction element material helps ensure a secure fixation of the friction element. Similarly, compared to friction elements made of rigid materials, flexibility makes it easier for the user to create a snap-fit ​​engagement.

[0034] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that a lateral protrusion, preferably a hook-shaped protrusion, is formed at the opening of the groove on the outermost second end portion of the first lateral protrusion and / or the metal rod.

[0035] In this patent application, "hook-shaped" means that the outer end of the protrusion does not necessarily extend by 180 degrees or more. The protrusion only needs to extend in the lateral direction relative to the second outermost end portion of the protrusion or metal rod. Therefore, a hook-shaped protrusion can have a shape extending in an arc of 90 degrees or less. The curvature of the lateral protrusion is preferably 90 degrees or less.

[0036] The protrusion can be arc-shaped. Alternatively, it can be angular and formed by straight edges of the protrusion or a combination of curved edges and straight edges.

[0037] By forming hook-shaped protrusions at the opening of the groove, the friction element material in the groove is securely fixed in the metal rod.

[0038] The hook shape ensures that a greater force is required to draw the friction element material out of the groove, which reduces the risk of accidental separation.

[0039] Preferably, the hook-shaped protrusion is located above the first transverse protrusion. Alternatively, it can be positioned on the outermost second end portion of the metal rod. In both cases, the opening not only has a smaller cross-section but also features an additional hook, which securely holds the resilient material within the groove.

[0040] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that the size of the first transverse hole in the friction element is made smaller than the size of the first transverse protrusion of the metal rod, so that the first transverse protrusion of the metal rod is accommodated therein with a clamping effect.

[0041] This ensures better safety to prevent accidental separation, because the first lateral protrusion of the metal rod must be pressed into the first lateral hole, thereby compressing the elastic material of the friction element. Thus, the friction element will create a clamping effect on the first lateral protrusion of the metal rod.

[0042] The size of the first lateral hole in the friction element can be manufactured smaller than the size of the first lateral protrusion of the metal rod, so that the first lateral protrusion of the metal rod is accommodated therein and has a clamping effect due to the elastic plasticity of the material. This provides additional safety to prevent accidental displacement of the friction element relative to the metal rod.

[0043] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that the width of the tube is less than the thickness of the metal rod, so that the sidewall of the tube is elastically adjacent to the side of the metal rod.

[0044] Due to the elastic plasticity of the pipe sidewalls, a clamping effect can be formed on the sides of the metal rod. However, the sidewalls will be very thin to ensure that the material at the bends is minimized. However, when the width of the pipe is manufactured to be less than the thickness of the metal rod, the pipe sidewalls will elastically adhere to the sides of the metal rod. This forms a fixation while avoiding the risk of impurities accumulating in the gap between the metal rod and the pipe sidewalls.

[0045] Alternatively, the width of the pipe can be the same as the thickness of the metal rod, so that the pipe sidewall is adjacent to the side of the metal rod without any elastic clamping effect. Nevertheless, this installation eliminates the risk of impurities accumulating in the gap between the metal rod and the pipe sidewall. This can be used, for example, in conjunction with an adhesive joint that secures the pipe sidewall to the metal rod.

[0046] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that, in the middle portion of the side facing the second protrusion of the metal rod, the metal rod has an adjacent surface for the end face of the friction element.

[0047] Because the metal rod has an abutment surface, the end face of the friction element can be adjacent to the abutment surface, avoiding the risk of longitudinal displacement of the friction element relative to the metal rod. The abutment surface of the metal rod can advantageously be provided by a metal rod having a groove at its bottom. Thus, a second transverse protrusion of the metal rod will be provided at the bottom of this groove. Therefore, the end wall of the groove can serve as the abutment surface of the end face of the friction element.

[0048] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that the friction element covers at least a portion of the outermost end face of the second end portion of the metal rod.

[0049] To prevent contact between the user and the metal rod, the friction element will be manufactured such that one end of the conduit is closed. This outermost portion of the friction element seals the conduit and simultaneously covers the outermost end face of the second end portion of the metal rod. This reduces the risk of contact between the user and the metal rod. Furthermore, the friction element material at this end will provide a metered material that reduces the risk of the first lateral protrusion of the metal rod penetrating the friction element material and exposing part of the metal rod.

[0050] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that the metal rod is made of titanium.

[0051] Titanium is the preferred material for making metal rods because it is a very lightweight material. However, other metals can also be used to make metal rods.

[0052] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that the sidewall of the friction element conduit has a reduced thickness facing the side of the metal rod to form a smooth transition.

[0053] The smooth transition avoids the risk of the metal rod causing annoyance to the user. The smooth transition between the metal rod and the side of the friction element contributes to user comfort.

[0054] According to another embodiment, the unique feature of the eyeglass rod of the present invention is that the friction element is made of an elastic polymer.

[0055] While various elastic materials can be used, elastic polymers are preferred due to their good moldability, allowing for the determination of holes to form the correct shape. This ensures that the friction element is securely fixed to the metal rod without the risk of accidental release.

[0056] According to another embodiment, a unique feature of the eyeglass rod of the present invention is that the bottom surface of the rectangular metal rod is provided with a groove, and a second transverse protrusion is located at the bottom of this groove. Preferably, the friction element has an equal length to the groove, such that an abutment surface for the end face of the friction element is provided at the end of the groove. This increases the certainty that the friction element will not displace relative to the metal rod in the longitudinal direction.

[0057] At the same time, since only a small portion of the friction element extends beyond the cross-section defined by the metal rod, the area of ​​the eyeglass rod with the friction element at the ear bend will be very small. Therefore, it can be said that the friction element is partially embedded in the metal rod, and the outer perimeter of both the friction element and the metal rod is close to the outer perimeter of the metal rod. This increases user comfort.

[0058] The metal rod can form an integral part of the hinge element, which is used to attach the eyeglass stem to the front frame. This can be achieved by properly bending the first end portion of the metal rod, thereby forming the hinge component. Attached Figure Description

[0059] The present invention will now be described in detail with reference to the accompanying drawings, wherein...

[0060] Figure 1 A partial perspective view of a pair of eyeglasses with a spectacle stem according to the present invention is shown;

[0061] Figure 2 It shows Figure 1A side view of a partial cross-section of the eyeglass rod;

[0062] Figure 3 It shows Figure 1 A partial side view of the eyeglass stem;

[0063] Figure 4 It shows Figure 3 A top view of the eyeglass rod;

[0064] Figure 5A It shows according to Figure 3 An enlarged sectional view of arrow AA;

[0065] Figure 5B The second embodiment is shown to be similar to Figure 5A A sectional view;

[0066] Figure 6 It shows Figure 1 A side view of a metal rod without any attached friction elements;

[0067] Figure 7 It shows Figure 6 A magnified view of a portion of the metal rod;

[0068] Figure 8 It shows Figure 1 A cross-sectional view of the friction element shown;

[0069] Figure 9 It shows Figure 8 A partial enlarged view of the sectional view; and

[0070] Figure 10 A partially enlarged view of the metal rod and friction element is shown, with the friction element shown in cross-section. Detailed Implementation

[0071] In the following text, identical or similar elements in different figures will be identified by the same reference numerals. Therefore, not all details relating to each individual figure will be explained.

[0072] Figure 1 A partial view of a pair of glasses 1 is shown. The glasses include a metal rod 2, which is connected to a front frame 4 via a hinge 3. Lenses 5 are housed within the front frame 4. The front frame 4 also includes a nose pad 6 for accommodating the user's nose.

[0073] The metal rod 2 has an ear bend 7. At the ear bend 7, a friction element 8 is installed at a position behind the user's ear where there will be contact. The friction element 8 is made of an elastic and malleable material, preferably an elastic polymer.

[0074] It can be seen that the metal rod 2 is plate-shaped, and its height 9 is significantly greater than its thickness 10.

[0075] Figure 2 A metal rod 2 with a friction element 8 is shown, wherein the friction element 8 is shown in cross-section. A groove 11 is provided on the bottom surface of the metal rod, and the friction element is partially accommodated within the groove 11. Within the groove 11, the metal rod has a plurality of transverse second protrusions 12. These second protrusions 12 are mushroom-shaped or arrow-shaped, so that their cross-section at the point of connection with the metal rod 2 is smaller than their cross-section at a certain distance from the metal rod. The protrusions 12, when installed in transverse second holes 13 in the friction element 8, have a snap-fit ​​effect, and are secured therein by a clamping force applied due to the elastic plasticity of the friction element material.

[0076] It can be said that the snap-fit ​​effect is achieved because the protrusion 12 is pressed into the hole 13.

[0077] from Figure 3 As can be clearly seen in Figure 5, the friction element has a conduit shape, with conduit 14 for receiving the metal rod 2. This conduit includes two sidewalls 15 and a bottom 15'. The sidewalls have surfaces 16 that are adjacent to the side surfaces 17 of the metal rod 2. Similarly, the bottom 15' has a bottom surface 18 that contacts the bottom surface 19 of the metal rod 2. The metal rod 2 has a top surface 20 that extends over the friction element 8.

[0078] Figure 5A and 5B An enlarged cross-sectional view of the eyeglass rod between the transverse protrusions 12 on the metal rod 2 is shown.

[0079] Figure 5A and Figure 5B It is also shown that the thickness of the pipe sidewall 15 decreases upward along the direction of the sidewall 17 of the metal rod 2. This provides a smooth transition between the friction element and the outside of the metal rod 2. However, there is an upper portion 21 on the pipe sidewall 15, which the user can use as a pressure surface when the friction element 8 is separated from the metal rod 2.

[0080] Figure 5A One embodiment is shown in which the width of the pipe 14 is less than the thickness of the metal rod 2, such that the sidewall 15 of the pipe is elastically adjacent to the sidewall 17 of the metal rod.

[0081] Figure 5B One embodiment is shown in which the width of the pipe 14 is the same as the thickness of the metal rod 2, such that the pipe sidewall 15 is adjacent to the side surface 17 of the metal rod without any elastic clamping effect. An adhesive joint 46 is provided between the pipe sidewall 15 and the side surface 17 to ensure that the friction element remains against the side surface 17 of the metal rod.

[0082] Figure 3 An enlarged side view of region 7 of the ear bend is shown.Figure 3 Section line AA is shown at the location of the sectional view in Figure 5. From Figure 3 As can be seen, the narrow edge region 20' (see Figure 5) on the metal rod 2 is located above the upper part 21. Therefore, when the friction element needs to be replaced, the user can easily grasp the upper part 21 and pull the friction element in the lateral direction to release it from its engagement with the protrusion 12.

[0083] Figure 2 A metal rod 2 is shown, having a first end portion 22' for attachment to the front frame and an outermost second end portion 22 furthest from the front frame 4. At the outermost second end portion 22, the metal rod has a first lateral protrusion 23.

[0084] Figure 6 and 7 The design of the first transverse protrusion 23 and the second protrusion 12 on the metal rod 2 is shown more clearly.

[0085] Metal rod 2 has a longitudinal direction 24 and a transverse direction 25, such as Figure 6 and Figure 7 As shown. The longitudinal direction 24 and the transverse direction 25 of the metal rod correspond to the longitudinal direction and transverse direction of the eyeglass rod.

[0086] The first transverse protrusion 23 extends in the transverse direction 25 and extends obliquely in the longitudinal direction 24. Thus, the first transverse protrusion 23 and the outermost part of the second end portion 22 of the eyeglass temple together form a groove 26 that opens in the longitudinal direction.

[0087] The groove 26 has an opening 27, the cross-section of which is smaller than the cross-section at the central portion 28 of the groove 26. At the opening 27 of the groove, the first lateral protrusion 23 is provided with a hook-shaped protrusion 29. This hook-shaped protrusion 29 helps to form the smaller opening 27 and, at the same time, helps to securely hold the elastic, malleable material from the friction element, such as in… Figure 2 and Figure 10 As shown in the image.

[0088] Figure 8 and Figure 9 A cross-sectional view of friction element 8 is shown. From Figure 9 It can be clearly seen that the friction element conduit 14 is closed by a metering material 30 at the first end 31 of the friction element. At the second end 32 of the friction element, the conduit 14 is open.

[0089] from Figure 9 As can be clearly seen, the friction element has a first transverse hole 33 in the metering material 30 of the first end portion 31, which closes the conduit 14. The first transverse hole 33 is used to accommodate the transverse first transverse protrusion 23 of the metal rod.

[0090] from Figure 10 It can be seen that the metering material 34 defining the first transverse hole 33 deforms when installed on the metal rod 2. This ensures that the friction element 8 remains fixed to the metal rod 2, preventing the friction element from unintentionally shifting in the longitudinal or transverse direction. The engagement between the first transverse protrusion 23, the first transverse hole 33, and the metering material 34 constitutes the first fixing device.

[0091] The second protrusion 12 and the second hole 13 can be said to constitute the second fixing device between the friction element 8 and the metal rod 2.

[0092] Figure 7 The metal rod 2 is shown to have a groove 35 at its outermost second end portion 22. This groove 35 is used to accommodate a protruding material component 36 at the first end portion 31 of the friction element 8.

[0093] Depend on Figure 10 It can be seen that this ensures that the outer end face 37 of the metal rod 2 and the outer end face 38 of the friction element 8 are in a horizontal position, and that the friction element surface 39 and the surface 40 of the metal rod 2 are adjacent to each other in the groove 35.

[0094] exist Figure 8 In the diagram, the second hole 30 of the friction element 8 is shown with an opening 41, the cross-section of which is smaller than the cross-section of the hole at the central portion 42 of the second hole 13. This achieves secure fixation of the lateral second protrusion 12. Figure 10 It can be clearly seen that after the introduction of the second transverse protrusion 12, the friction element material will undergo elastic deformation due to the clamping effect of the second protrusion 12 being accommodated in the second hole 13, which helps to secure the fixation.

[0095] Similarly, the size of the first transverse protrusion 23 of the eyeglass stem will be larger than the first transverse hole 33 of the friction element, so that the accommodation here also has a clamping effect.

[0096] Figure 6 The diagram shows that the middle portion 43 of the metal rod 2 has an abutment surface 44 at the end of the groove 11. When the friction element 8 is mounted on the metal rod 2, this abutment surface 44 is used to interact with the end face 45 of the friction element 8 (see [reference]). Figure 8 (Adjacent to each other.) This further ensures safety by preventing accidental displacement of the friction element 8 relative to the metal rod 2.

Claims

1. An eyeglasses stem having a first end portion (22') for connecting to a front frame (4) and an outermost second end portion (22) for bending to form an ear bend (7), the eyeglasses stem having a longitudinal direction (24) and a transverse direction (25), and the eyeglasses stem, at least above the outermost second end portion (22), is formed by a plate-shaped rod having a side surface (17), a bottom surface (19), and a top surface (20), wherein a friction element (8) made of an elastic malleable material is engaged with the plate-shaped rod at the ear bend (7), the ear bend being for contacting the back of the user's ear, and wherein the plate-shaped rod has a first transverse protrusion (23) oriented in the transverse direction (25) and obliquely oriented in the longitudinal direction (24) to form a groove (26) with a longitudinal opening together with the second end portion of the plate-shaped rod, and wherein a first end portion (31) of the friction element is provided with a first transverse protrusion (23). A transverse hole (33) is provided for receiving a first transverse protrusion (23) of a plate-shaped rod, wherein the plate-shaped rod is a metal rod and the friction element (8) is a pipe, wherein the pipe sidewall (15) and bottom (15') cover the side (17) and bottom (19) of the metal rod, the first transverse hole (33) of the friction element is formed in a metering material (30) and oriented in the transverse direction (25) to receive the first transverse protrusion (23) of the metal rod, and the elastic material at the first end portion (31) of the friction element is received in a groove (26) of the opening of the metal rod, wherein the first transverse protrusion (23) and the groove (26) form a first fixing device, and another fixing device is provided between the pipe sidewall (15) and bottom (15') of the pipe and the side (17) of the metal rod to prevent the friction element from being displaced in the longitudinal direction (24) and transverse direction (25) of the metal rod, characterized in that, The first transverse protrusion (23) of the plate rod is provided on its outermost second end portion (22). The longitudinally open groove (26) is formed together with the outermost second end portion (22) of the metal rod. The cross-section of the longitudinally open groove (26) at its opening (27) is smaller than the cross-section at the center portion (28) of the groove (26). The friction element (8) at the first end of the pipe (14) is closed by a metering material (30) at the first end portion (31) of the friction element. The first transverse hole (33) of the friction element is also inclined in the longitudinal direction (24). The elastic material at the first end portion (31) of the friction element is accommodated in the groove (26) of the opening of the metal rod in an elastically compressed state.

2. The spectacle shaft according to claim 1, characterized in that, The metal rod (2) has a transverse second protrusion (12) on its bottom surface (19) for forming a releasable snap-fit ​​with the second hole (13) at the bottom (15') of the pipe. The second protrusion at the connection between the second protrusion (12) and the metal rod (2) has a smaller cross-section than the cross-section of the second protrusion further away from the metal rod (2). Therefore, due to the elastic plasticity of the friction element (8) material, the second protrusion (12) is fixed in the second hole (13) at the bottom (15') of the pipe.

3. The spectacle rod according to claim 1 or 2, characterized in that, A transverse protrusion (29) is formed at the opening (27) of the groove (26) on the first transverse protrusion (23) and / or the outermost second end portion (22) of the metal rod.

4. The eyeglasses rod according to claim 3, characterized in that, The transverse protrusion (29) is a hook-shaped protrusion.

5. The spectacle rod according to claim 1 or 2, characterized in that, The size of the first transverse hole (33) in the friction element (8) is made smaller than the size of the first transverse protrusion (23) of the metal rod, so that the first transverse protrusion (23) of the metal rod is accommodated therein with a clamping effect.

6. The spectacle temple according to claim 1 or 2, characterized in that, The width of the pipe (14) is less than the thickness of the metal rod (2), so that the sidewall (15) of the pipe and the sidewall (17) of the metal rod are elastically adjacent.

7. The eyeglass rod according to claim 1 or 2, characterized in that, In the middle portion (43) on the side facing the second protrusion (12) of the metal rod (2), the metal rod (2) has an adjacent surface (44) for the end face (45) of the friction element (8).

8. The spectacle rod according to claim 1 or 2, characterized in that, The friction element (8) covers at least a portion of the outermost end face of the outermost second end portion (22) of the metal rod.

9. The spectacle rod according to claim 1 or 2, characterized in that, The metal rod (2) is made of titanium.

10. The spectacle rod according to claim 1 or 2, characterized in that, The sidewall (15) of the friction element conduit (14) has a reduced thickness toward the side (17) of the metal rod to form a smooth transition.

11. The spectacle temple according to claim 1 or 2, characterized in that, The metal rod (2) has a groove (35) at its outermost second end portion (22), where one end (36) of the friction element (8) is adjacent.

Images